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-rw-r--r--Documentation/ABI/testing/debugfs-ideapad19
-rw-r--r--Documentation/ABI/testing/sysfs-platform-ideapad-laptop15
-rw-r--r--Documentation/DMA-API.txt7
-rw-r--r--Documentation/cgroups/memory.txt1
-rw-r--r--Documentation/device-mapper/dm-log.txt2
-rw-r--r--Documentation/device-mapper/persistent-data.txt84
-rw-r--r--Documentation/device-mapper/thin-provisioning.txt285
-rw-r--r--Documentation/devicetree/bindings/arm/calxeda.txt8
-rw-r--r--Documentation/devicetree/bindings/arm/fsl.txt26
-rw-r--r--Documentation/devicetree/bindings/arm/gic.txt55
-rw-r--r--Documentation/devicetree/bindings/arm/omap/dsp.txt14
-rw-r--r--Documentation/devicetree/bindings/arm/omap/iva.txt19
-rw-r--r--Documentation/devicetree/bindings/arm/omap/l3-noc.txt19
-rw-r--r--Documentation/devicetree/bindings/arm/omap/mpu.txt27
-rw-r--r--Documentation/devicetree/bindings/arm/omap/omap.txt43
-rw-r--r--Documentation/devicetree/bindings/arm/picoxcell.txt24
-rw-r--r--Documentation/devicetree/bindings/ata/calxeda-sata.txt17
-rw-r--r--Documentation/devicetree/bindings/crypto/picochip-spacc.txt23
-rw-r--r--Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt25
-rw-r--r--Documentation/devicetree/bindings/i2c/samsung-i2c.txt39
-rw-r--r--Documentation/devicetree/bindings/pinmux/pinmux_nvidia.txt5
-rw-r--r--Documentation/devicetree/bindings/tty/serial/msm_serial.txt27
-rw-r--r--Documentation/devicetree/bindings/virtio/mmio.txt17
-rw-r--r--Documentation/feature-removal-schedule.txt35
-rw-r--r--Documentation/filesystems/Locking1
-rw-r--r--Documentation/filesystems/ext3.txt8
-rw-r--r--Documentation/filesystems/ext4.txt41
-rw-r--r--Documentation/hwmon/w83627ehf28
-rw-r--r--Documentation/hwspinlock.txt74
-rw-r--r--Documentation/kernel-parameters.txt14
-rw-r--r--Documentation/networking/ipvs-sysctl.txt62
-rw-r--r--Documentation/power/regulator/machine.txt19
-rw-r--r--Documentation/rapidio/rapidio.txt2
-rw-r--r--Documentation/rapidio/tsi721.txt49
-rw-r--r--Documentation/sysctl/kernel.txt8
-rw-r--r--Documentation/trace/postprocess/trace-vmscan-postprocess.pl8
-rw-r--r--Documentation/virtual/uml/UserModeLinux-HOWTO.txt532
37 files changed, 1267 insertions, 415 deletions
diff --git a/Documentation/ABI/testing/debugfs-ideapad b/Documentation/ABI/testing/debugfs-ideapad
new file mode 100644
index 000000000000..7079c0b21030
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-ideapad
@@ -0,0 +1,19 @@
1What: /sys/kernel/debug/ideapad/cfg
2Date: Sep 2011
3KernelVersion: 3.2
4Contact: Ike Panhc <ike.pan@canonical.com>
5Description:
6
7cfg shows the return value of _CFG method in VPC2004 device. It tells machine
8capability and what graphic component within the machine.
9
10
11What: /sys/kernel/debug/ideapad/status
12Date: Sep 2011
13KernelVersion: 3.2
14Contact: Ike Panhc <ike.pan@canonical.com>
15Description:
16
17status shows infos we can read and tells its meaning and value.
18
19
diff --git a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop
index ff53183c3848..814b01354c41 100644
--- a/Documentation/ABI/testing/sysfs-platform-ideapad-laptop
+++ b/Documentation/ABI/testing/sysfs-platform-ideapad-laptop
@@ -5,19 +5,4 @@ Contact: "Ike Panhc <ike.pan@canonical.com>"
5Description: 5Description:
6 Control the power of camera module. 1 means on, 0 means off. 6 Control the power of camera module. 1 means on, 0 means off.
7 7
8What: /sys/devices/platform/ideapad/cfg
9Date: Jun 2011
10KernelVersion: 3.1
11Contact: "Ike Panhc <ike.pan@canonical.com>"
12Description:
13 Ideapad capability bits.
14 Bit 8-10: 1 - Intel graphic only
15 2 - ATI graphic only
16 3 - Nvidia graphic only
17 4 - Intel and ATI graphic
18 5 - Intel and Nvidia graphic
19 Bit 16: Bluetooth exist (1 for exist)
20 Bit 17: 3G exist (1 for exist)
21 Bit 18: Wifi exist (1 for exist)
22 Bit 19: Camera exist (1 for exist)
23 8
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index fe2326906610..66bd97a95f10 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -50,6 +50,13 @@ specify the GFP_ flags (see kmalloc) for the allocation (the
50implementation may choose to ignore flags that affect the location of 50implementation may choose to ignore flags that affect the location of
51the returned memory, like GFP_DMA). 51the returned memory, like GFP_DMA).
52 52
53void *
54dma_zalloc_coherent(struct device *dev, size_t size,
55 dma_addr_t *dma_handle, gfp_t flag)
56
57Wraps dma_alloc_coherent() and also zeroes the returned memory if the
58allocation attempt succeeded.
59
53void 60void
54dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, 61dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
55 dma_addr_t dma_handle) 62 dma_addr_t dma_handle)
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 06eb6d957c83..cc0ebc5241b3 100644
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -418,7 +418,6 @@ total_unevictable - sum of all children's "unevictable"
418 418
419# The following additional stats are dependent on CONFIG_DEBUG_VM. 419# The following additional stats are dependent on CONFIG_DEBUG_VM.
420 420
421inactive_ratio - VM internal parameter. (see mm/page_alloc.c)
422recent_rotated_anon - VM internal parameter. (see mm/vmscan.c) 421recent_rotated_anon - VM internal parameter. (see mm/vmscan.c)
423recent_rotated_file - VM internal parameter. (see mm/vmscan.c) 422recent_rotated_file - VM internal parameter. (see mm/vmscan.c)
424recent_scanned_anon - VM internal parameter. (see mm/vmscan.c) 423recent_scanned_anon - VM internal parameter. (see mm/vmscan.c)
diff --git a/Documentation/device-mapper/dm-log.txt b/Documentation/device-mapper/dm-log.txt
index 994dd75475a6..c155ac569c44 100644
--- a/Documentation/device-mapper/dm-log.txt
+++ b/Documentation/device-mapper/dm-log.txt
@@ -48,7 +48,7 @@ kernel and userspace, 'connector' is used as the interface for
48communication. 48communication.
49 49
50There are currently two userspace log implementations that leverage this 50There are currently two userspace log implementations that leverage this
51framework - "clustered_disk" and "clustered_core". These implementations 51framework - "clustered-disk" and "clustered-core". These implementations
52provide a cluster-coherent log for shared-storage. Device-mapper mirroring 52provide a cluster-coherent log for shared-storage. Device-mapper mirroring
53can be used in a shared-storage environment when the cluster log implementations 53can be used in a shared-storage environment when the cluster log implementations
54are employed. 54are employed.
diff --git a/Documentation/device-mapper/persistent-data.txt b/Documentation/device-mapper/persistent-data.txt
new file mode 100644
index 000000000000..0e5df9b04ad2
--- /dev/null
+++ b/Documentation/device-mapper/persistent-data.txt
@@ -0,0 +1,84 @@
1Introduction
2============
3
4The more-sophisticated device-mapper targets require complex metadata
5that is managed in kernel. In late 2010 we were seeing that various
6different targets were rolling their own data strutures, for example:
7
8- Mikulas Patocka's multisnap implementation
9- Heinz Mauelshagen's thin provisioning target
10- Another btree-based caching target posted to dm-devel
11- Another multi-snapshot target based on a design of Daniel Phillips
12
13Maintaining these data structures takes a lot of work, so if possible
14we'd like to reduce the number.
15
16The persistent-data library is an attempt to provide a re-usable
17framework for people who want to store metadata in device-mapper
18targets. It's currently used by the thin-provisioning target and an
19upcoming hierarchical storage target.
20
21Overview
22========
23
24The main documentation is in the header files which can all be found
25under drivers/md/persistent-data.
26
27The block manager
28-----------------
29
30dm-block-manager.[hc]
31
32This provides access to the data on disk in fixed sized-blocks. There
33is a read/write locking interface to prevent concurrent accesses, and
34keep data that is being used in the cache.
35
36Clients of persistent-data are unlikely to use this directly.
37
38The transaction manager
39-----------------------
40
41dm-transaction-manager.[hc]
42
43This restricts access to blocks and enforces copy-on-write semantics.
44The only way you can get hold of a writable block through the
45transaction manager is by shadowing an existing block (ie. doing
46copy-on-write) or allocating a fresh one. Shadowing is elided within
47the same transaction so performance is reasonable. The commit method
48ensures that all data is flushed before it writes the superblock.
49On power failure your metadata will be as it was when last committed.
50
51The Space Maps
52--------------
53
54dm-space-map.h
55dm-space-map-metadata.[hc]
56dm-space-map-disk.[hc]
57
58On-disk data structures that keep track of reference counts of blocks.
59Also acts as the allocator of new blocks. Currently two
60implementations: a simpler one for managing blocks on a different
61device (eg. thinly-provisioned data blocks); and one for managing
62the metadata space. The latter is complicated by the need to store
63its own data within the space it's managing.
64
65The data structures
66-------------------
67
68dm-btree.[hc]
69dm-btree-remove.c
70dm-btree-spine.c
71dm-btree-internal.h
72
73Currently there is only one data structure, a hierarchical btree.
74There are plans to add more. For example, something with an
75array-like interface would see a lot of use.
76
77The btree is 'hierarchical' in that you can define it to be composed
78of nested btrees, and take multiple keys. For example, the
79thin-provisioning target uses a btree with two levels of nesting.
80The first maps a device id to a mapping tree, and that in turn maps a
81virtual block to a physical block.
82
83Values stored in the btrees can have arbitrary size. Keys are always
8464bits, although nesting allows you to use multiple keys.
diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt
new file mode 100644
index 000000000000..801d9d1cf82b
--- /dev/null
+++ b/Documentation/device-mapper/thin-provisioning.txt
@@ -0,0 +1,285 @@
1Introduction
2============
3
4This document descibes a collection of device-mapper targets that
5between them implement thin-provisioning and snapshots.
6
7The main highlight of this implementation, compared to the previous
8implementation of snapshots, is that it allows many virtual devices to
9be stored on the same data volume. This simplifies administration and
10allows the sharing of data between volumes, thus reducing disk usage.
11
12Another significant feature is support for an arbitrary depth of
13recursive snapshots (snapshots of snapshots of snapshots ...). The
14previous implementation of snapshots did this by chaining together
15lookup tables, and so performance was O(depth). This new
16implementation uses a single data structure to avoid this degradation
17with depth. Fragmentation may still be an issue, however, in some
18scenarios.
19
20Metadata is stored on a separate device from data, giving the
21administrator some freedom, for example to:
22
23- Improve metadata resilience by storing metadata on a mirrored volume
24 but data on a non-mirrored one.
25
26- Improve performance by storing the metadata on SSD.
27
28Status
29======
30
31These targets are very much still in the EXPERIMENTAL state. Please
32do not yet rely on them in production. But do experiment and offer us
33feedback. Different use cases will have different performance
34characteristics, for example due to fragmentation of the data volume.
35
36If you find this software is not performing as expected please mail
37dm-devel@redhat.com with details and we'll try our best to improve
38things for you.
39
40Userspace tools for checking and repairing the metadata are under
41development.
42
43Cookbook
44========
45
46This section describes some quick recipes for using thin provisioning.
47They use the dmsetup program to control the device-mapper driver
48directly. End users will be advised to use a higher-level volume
49manager such as LVM2 once support has been added.
50
51Pool device
52-----------
53
54The pool device ties together the metadata volume and the data volume.
55It maps I/O linearly to the data volume and updates the metadata via
56two mechanisms:
57
58- Function calls from the thin targets
59
60- Device-mapper 'messages' from userspace which control the creation of new
61 virtual devices amongst other things.
62
63Setting up a fresh pool device
64------------------------------
65
66Setting up a pool device requires a valid metadata device, and a
67data device. If you do not have an existing metadata device you can
68make one by zeroing the first 4k to indicate empty metadata.
69
70 dd if=/dev/zero of=$metadata_dev bs=4096 count=1
71
72The amount of metadata you need will vary according to how many blocks
73are shared between thin devices (i.e. through snapshots). If you have
74less sharing than average you'll need a larger-than-average metadata device.
75
76As a guide, we suggest you calculate the number of bytes to use in the
77metadata device as 48 * $data_dev_size / $data_block_size but round it up
78to 2MB if the answer is smaller. The largest size supported is 16GB.
79
80If you're creating large numbers of snapshots which are recording large
81amounts of change, you may need find you need to increase this.
82
83Reloading a pool table
84----------------------
85
86You may reload a pool's table, indeed this is how the pool is resized
87if it runs out of space. (N.B. While specifying a different metadata
88device when reloading is not forbidden at the moment, things will go
89wrong if it does not route I/O to exactly the same on-disk location as
90previously.)
91
92Using an existing pool device
93-----------------------------
94
95 dmsetup create pool \
96 --table "0 20971520 thin-pool $metadata_dev $data_dev \
97 $data_block_size $low_water_mark"
98
99$data_block_size gives the smallest unit of disk space that can be
100allocated at a time expressed in units of 512-byte sectors. People
101primarily interested in thin provisioning may want to use a value such
102as 1024 (512KB). People doing lots of snapshotting may want a smaller value
103such as 128 (64KB). If you are not zeroing newly-allocated data,
104a larger $data_block_size in the region of 256000 (128MB) is suggested.
105$data_block_size must be the same for the lifetime of the
106metadata device.
107
108$low_water_mark is expressed in blocks of size $data_block_size. If
109free space on the data device drops below this level then a dm event
110will be triggered which a userspace daemon should catch allowing it to
111extend the pool device. Only one such event will be sent.
112Resuming a device with a new table itself triggers an event so the
113userspace daemon can use this to detect a situation where a new table
114already exceeds the threshold.
115
116Thin provisioning
117-----------------
118
119i) Creating a new thinly-provisioned volume.
120
121 To create a new thinly- provisioned volume you must send a message to an
122 active pool device, /dev/mapper/pool in this example.
123
124 dmsetup message /dev/mapper/pool 0 "create_thin 0"
125
126 Here '0' is an identifier for the volume, a 24-bit number. It's up
127 to the caller to allocate and manage these identifiers. If the
128 identifier is already in use, the message will fail with -EEXIST.
129
130ii) Using a thinly-provisioned volume.
131
132 Thinly-provisioned volumes are activated using the 'thin' target:
133
134 dmsetup create thin --table "0 2097152 thin /dev/mapper/pool 0"
135
136 The last parameter is the identifier for the thinp device.
137
138Internal snapshots
139------------------
140
141i) Creating an internal snapshot.
142
143 Snapshots are created with another message to the pool.
144
145 N.B. If the origin device that you wish to snapshot is active, you
146 must suspend it before creating the snapshot to avoid corruption.
147 This is NOT enforced at the moment, so please be careful!
148
149 dmsetup suspend /dev/mapper/thin
150 dmsetup message /dev/mapper/pool 0 "create_snap 1 0"
151 dmsetup resume /dev/mapper/thin
152
153 Here '1' is the identifier for the volume, a 24-bit number. '0' is the
154 identifier for the origin device.
155
156ii) Using an internal snapshot.
157
158 Once created, the user doesn't have to worry about any connection
159 between the origin and the snapshot. Indeed the snapshot is no
160 different from any other thinly-provisioned device and can be
161 snapshotted itself via the same method. It's perfectly legal to
162 have only one of them active, and there's no ordering requirement on
163 activating or removing them both. (This differs from conventional
164 device-mapper snapshots.)
165
166 Activate it exactly the same way as any other thinly-provisioned volume:
167
168 dmsetup create snap --table "0 2097152 thin /dev/mapper/pool 1"
169
170Deactivation
171------------
172
173All devices using a pool must be deactivated before the pool itself
174can be.
175
176 dmsetup remove thin
177 dmsetup remove snap
178 dmsetup remove pool
179
180Reference
181=========
182
183'thin-pool' target
184------------------
185
186i) Constructor
187
188 thin-pool <metadata dev> <data dev> <data block size (sectors)> \
189 <low water mark (blocks)> [<number of feature args> [<arg>]*]
190
191 Optional feature arguments:
192 - 'skip_block_zeroing': skips the zeroing of newly-provisioned blocks.
193
194 Data block size must be between 64KB (128 sectors) and 1GB
195 (2097152 sectors) inclusive.
196
197
198ii) Status
199
200 <transaction id> <used metadata blocks>/<total metadata blocks>
201 <used data blocks>/<total data blocks> <held metadata root>
202
203
204 transaction id:
205 A 64-bit number used by userspace to help synchronise with metadata
206 from volume managers.
207
208 used data blocks / total data blocks
209 If the number of free blocks drops below the pool's low water mark a
210 dm event will be sent to userspace. This event is edge-triggered and
211 it will occur only once after each resume so volume manager writers
212 should register for the event and then check the target's status.
213
214 held metadata root:
215 The location, in sectors, of the metadata root that has been
216 'held' for userspace read access. '-' indicates there is no
217 held root. This feature is not yet implemented so '-' is
218 always returned.
219
220iii) Messages
221
222 create_thin <dev id>
223
224 Create a new thinly-provisioned device.
225 <dev id> is an arbitrary unique 24-bit identifier chosen by
226 the caller.
227
228 create_snap <dev id> <origin id>
229
230 Create a new snapshot of another thinly-provisioned device.
231 <dev id> is an arbitrary unique 24-bit identifier chosen by
232 the caller.
233 <origin id> is the identifier of the thinly-provisioned device
234 of which the new device will be a snapshot.
235
236 delete <dev id>
237
238 Deletes a thin device. Irreversible.
239
240 trim <dev id> <new size in sectors>
241
242 Delete mappings from the end of a thin device. Irreversible.
243 You might want to use this if you're reducing the size of
244 your thinly-provisioned device. In many cases, due to the
245 sharing of blocks between devices, it is not possible to
246 determine in advance how much space 'trim' will release. (In
247 future a userspace tool might be able to perform this
248 calculation.)
249
250 set_transaction_id <current id> <new id>
251
252 Userland volume managers, such as LVM, need a way to
253 synchronise their external metadata with the internal metadata of the
254 pool target. The thin-pool target offers to store an
255 arbitrary 64-bit transaction id and return it on the target's
256 status line. To avoid races you must provide what you think
257 the current transaction id is when you change it with this
258 compare-and-swap message.
259
260'thin' target
261-------------
262
263i) Constructor
264
265 thin <pool dev> <dev id>
266
267 pool dev:
268 the thin-pool device, e.g. /dev/mapper/my_pool or 253:0
269
270 dev id:
271 the internal device identifier of the device to be
272 activated.
273
274The pool doesn't store any size against the thin devices. If you
275load a thin target that is smaller than you've been using previously,
276then you'll have no access to blocks mapped beyond the end. If you
277load a target that is bigger than before, then extra blocks will be
278provisioned as and when needed.
279
280If you wish to reduce the size of your thin device and potentially
281regain some space then send the 'trim' message to the pool.
282
283ii) Status
284
285 <nr mapped sectors> <highest mapped sector>
diff --git a/Documentation/devicetree/bindings/arm/calxeda.txt b/Documentation/devicetree/bindings/arm/calxeda.txt
new file mode 100644
index 000000000000..4755caaccba6
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/calxeda.txt
@@ -0,0 +1,8 @@
1Calxeda Highbank Platforms Device Tree Bindings
2-----------------------------------------------
3
4Boards with Calxeda Cortex-A9 based Highbank SOC shall have the following
5properties.
6
7Required root node properties:
8 - compatible = "calxeda,highbank";
diff --git a/Documentation/devicetree/bindings/arm/fsl.txt b/Documentation/devicetree/bindings/arm/fsl.txt
new file mode 100644
index 000000000000..c9848ad0e2e3
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/fsl.txt
@@ -0,0 +1,26 @@
1Freescale i.MX Platforms Device Tree Bindings
2-----------------------------------------------
3
4i.MX51 Babbage Board
5Required root node properties:
6 - compatible = "fsl,imx51-babbage", "fsl,imx51";
7
8i.MX53 Automotive Reference Design Board
9Required root node properties:
10 - compatible = "fsl,imx53-ard", "fsl,imx53";
11
12i.MX53 Evaluation Kit
13Required root node properties:
14 - compatible = "fsl,imx53-evk", "fsl,imx53";
15
16i.MX53 Quick Start Board
17Required root node properties:
18 - compatible = "fsl,imx53-qsb", "fsl,imx53";
19
20i.MX53 Smart Mobile Reference Design Board
21Required root node properties:
22 - compatible = "fsl,imx53-smd", "fsl,imx53";
23
24i.MX6 Quad SABRE Automotive Board
25Required root node properties:
26 - compatible = "fsl,imx6q-sabreauto", "fsl,imx6q";
diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt
new file mode 100644
index 000000000000..52916b4aa1fe
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/gic.txt
@@ -0,0 +1,55 @@
1* ARM Generic Interrupt Controller
2
3ARM SMP cores are often associated with a GIC, providing per processor
4interrupts (PPI), shared processor interrupts (SPI) and software
5generated interrupts (SGI).
6
7Primary GIC is attached directly to the CPU and typically has PPIs and SGIs.
8Secondary GICs are cascaded into the upward interrupt controller and do not
9have PPIs or SGIs.
10
11Main node required properties:
12
13- compatible : should be one of:
14 "arm,cortex-a9-gic"
15 "arm,arm11mp-gic"
16- interrupt-controller : Identifies the node as an interrupt controller
17- #interrupt-cells : Specifies the number of cells needed to encode an
18 interrupt source. The type shall be a <u32> and the value shall be 3.
19
20 The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
21 interrupts.
22
23 The 2nd cell contains the interrupt number for the interrupt type.
24 SPI interrupts are in the range [0-987]. PPI interrupts are in the
25 range [0-15].
26
27 The 3rd cell is the flags, encoded as follows:
28 bits[3:0] trigger type and level flags.
29 1 = low-to-high edge triggered
30 2 = high-to-low edge triggered
31 4 = active high level-sensitive
32 8 = active low level-sensitive
33 bits[15:8] PPI interrupt cpu mask. Each bit corresponds to each of
34 the 8 possible cpus attached to the GIC. A bit set to '1' indicated
35 the interrupt is wired to that CPU. Only valid for PPI interrupts.
36
37- reg : Specifies base physical address(s) and size of the GIC registers. The
38 first region is the GIC distributor register base and size. The 2nd region is
39 the GIC cpu interface register base and size.
40
41Optional
42- interrupts : Interrupt source of the parent interrupt controller. Only
43 present on secondary GICs.
44
45Example:
46
47 intc: interrupt-controller@fff11000 {
48 compatible = "arm,cortex-a9-gic";
49 #interrupt-cells = <3>;
50 #address-cells = <1>;
51 interrupt-controller;
52 reg = <0xfff11000 0x1000>,
53 <0xfff10100 0x100>;
54 };
55
diff --git a/Documentation/devicetree/bindings/arm/omap/dsp.txt b/Documentation/devicetree/bindings/arm/omap/dsp.txt
new file mode 100644
index 000000000000..d3830a32ce08
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/dsp.txt
@@ -0,0 +1,14 @@
1* TI - DSP (Digital Signal Processor)
2
3TI DSP included in OMAP SoC
4
5Required properties:
6- compatible : Should be "ti,omap3-c64" for OMAP3 & 4
7- ti,hwmods: "dsp"
8
9Examples:
10
11dsp {
12 compatible = "ti,omap3-c64";
13 ti,hwmods = "dsp";
14};
diff --git a/Documentation/devicetree/bindings/arm/omap/iva.txt b/Documentation/devicetree/bindings/arm/omap/iva.txt
new file mode 100644
index 000000000000..6d6295171358
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/iva.txt
@@ -0,0 +1,19 @@
1* TI - IVA (Imaging and Video Accelerator) subsystem
2
3The IVA contain various audio, video or imaging HW accelerator
4depending of the version.
5
6Required properties:
7- compatible : Should be:
8 - "ti,ivahd" for OMAP4
9 - "ti,iva2.2" for OMAP3
10 - "ti,iva2.1" for OMAP2430
11 - "ti,iva1" for OMAP2420
12- ti,hwmods: "iva"
13
14Examples:
15
16iva {
17 compatible = "ti,ivahd", "ti,iva";
18 ti,hwmods = "iva";
19};
diff --git a/Documentation/devicetree/bindings/arm/omap/l3-noc.txt b/Documentation/devicetree/bindings/arm/omap/l3-noc.txt
new file mode 100644
index 000000000000..6888a5efc860
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/l3-noc.txt
@@ -0,0 +1,19 @@
1* TI - L3 Network On Chip (NoC)
2
3This version is an implementation of the generic NoC IP
4provided by Arteris.
5
6Required properties:
7- compatible : Should be "ti,omap3-l3-smx" for OMAP3 family
8 Should be "ti,omap4-l3-noc" for OMAP4 family
9- ti,hwmods: "l3_main_1", ... One hwmod for each noc domain.
10
11Examples:
12
13ocp {
14 compatible = "ti,omap4-l3-noc", "simple-bus";
15 #address-cells = <1>;
16 #size-cells = <1>;
17 ranges;
18 ti,hwmods = "l3_main_1", "l3_main_2", "l3_main_3";
19};
diff --git a/Documentation/devicetree/bindings/arm/omap/mpu.txt b/Documentation/devicetree/bindings/arm/omap/mpu.txt
new file mode 100644
index 000000000000..1a5a42ce21bb
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/mpu.txt
@@ -0,0 +1,27 @@
1* TI - MPU (Main Processor Unit) subsystem
2
3The MPU subsystem contain one or several ARM cores
4depending of the version.
5The MPU contain CPUs, GIC, L2 cache and a local PRCM.
6
7Required properties:
8- compatible : Should be "ti,omap3-mpu" for OMAP3
9 Should be "ti,omap4-mpu" for OMAP4
10- ti,hwmods: "mpu"
11
12Examples:
13
14- For an OMAP4 SMP system:
15
16mpu {
17 compatible = "ti,omap4-mpu";
18 ti,hwmods = "mpu";
19};
20
21
22- For an OMAP3 monocore system:
23
24mpu {
25 compatible = "ti,omap3-mpu";
26 ti,hwmods = "mpu";
27};
diff --git a/Documentation/devicetree/bindings/arm/omap/omap.txt b/Documentation/devicetree/bindings/arm/omap/omap.txt
new file mode 100644
index 000000000000..dbdab40ed3a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/omap/omap.txt
@@ -0,0 +1,43 @@
1* Texas Instruments OMAP
2
3OMAP is currently using a static file per SoC family to describe the
4IPs present in the SoC.
5On top of that an omap_device is created to extend the platform_device
6capabilities and to allow binding with one or several hwmods.
7The hwmods will contain all the information to build the device:
8adresse range, irq lines, dma lines, interconnect, PRCM register,
9clock domain, input clocks.
10For the moment just point to the existing hwmod, the next step will be
11to move data from hwmod to device-tree representation.
12
13
14Required properties:
15- compatible: Every devices present in OMAP SoC should be in the
16 form: "ti,XXX"
17- ti,hwmods: list of hwmod names (ascii strings), that comes from the OMAP
18 HW documentation, attached to a device. Must contain at least
19 one hwmod.
20
21Optional properties:
22- ti,no_idle_on_suspend: When present, it prevents the PM to idle the module
23 during suspend.
24
25
26Example:
27
28spinlock@1 {
29 compatible = "ti,omap4-spinlock";
30 ti,hwmods = "spinlock";
31};
32
33
34Boards:
35
36- OMAP3 BeagleBoard : Low cost community board
37 compatible = "ti,omap3-beagle", "ti,omap3"
38
39- OMAP4 SDP : Software Developement Board
40 compatible = "ti,omap4-sdp", "ti,omap4430"
41
42- OMAP4 PandaBoard : Low cost community board
43 compatible = "ti,omap4-panda", "ti,omap4430"
diff --git a/Documentation/devicetree/bindings/arm/picoxcell.txt b/Documentation/devicetree/bindings/arm/picoxcell.txt
new file mode 100644
index 000000000000..e75c0ef51e69
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/picoxcell.txt
@@ -0,0 +1,24 @@
1Picochip picoXcell device tree bindings.
2========================================
3
4Required root node properties:
5 - compatible:
6 - "picochip,pc7302-pc3x3" : PC7302 development board with PC3X3 device.
7 - "picochip,pc7302-pc3x2" : PC7302 development board with PC3X2 device.
8 - "picochip,pc3x3" : picoXcell PC3X3 device based board.
9 - "picochip,pc3x2" : picoXcell PC3X2 device based board.
10
11Timers required properties:
12 - compatible = "picochip,pc3x2-timer"
13 - interrupts : The single IRQ line for the timer.
14 - clock-freq : The frequency in HZ of the timer.
15 - reg : The register bank for the timer.
16
17Note: two timers are required - one for the scheduler clock and one for the
18event tick/NOHZ.
19
20VIC required properties:
21 - compatible = "arm,pl192-vic".
22 - interrupt-controller.
23 - reg : The register bank for the device.
24 - #interrupt-cells : Must be 1.
diff --git a/Documentation/devicetree/bindings/ata/calxeda-sata.txt b/Documentation/devicetree/bindings/ata/calxeda-sata.txt
new file mode 100644
index 000000000000..79caa5651f53
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/calxeda-sata.txt
@@ -0,0 +1,17 @@
1* Calxeda SATA Controller
2
3SATA nodes are defined to describe on-chip Serial ATA controllers.
4Each SATA controller should have its own node.
5
6Required properties:
7- compatible : compatible list, contains "calxeda,hb-ahci"
8- interrupts : <interrupt mapping for SATA IRQ>
9- reg : <registers mapping>
10
11Example:
12 sata@ffe08000 {
13 compatible = "calxeda,hb-ahci";
14 reg = <0xffe08000 0x1000>;
15 interrupts = <115>;
16 };
17
diff --git a/Documentation/devicetree/bindings/crypto/picochip-spacc.txt b/Documentation/devicetree/bindings/crypto/picochip-spacc.txt
new file mode 100644
index 000000000000..d8609ece1f4c
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/picochip-spacc.txt
@@ -0,0 +1,23 @@
1Picochip picoXcell SPAcc (Security Protocol Accelerator) bindings
2
3Picochip picoXcell devices contain crypto offload engines that may be used for
4IPSEC and femtocell layer 2 ciphering.
5
6Required properties:
7 - compatible : "picochip,spacc-ipsec" for the IPSEC offload engine
8 "picochip,spacc-l2" for the femtocell layer 2 ciphering engine.
9 - reg : Offset and length of the register set for this device
10 - interrupt-parent : The interrupt controller that controls the SPAcc
11 interrupt.
12 - interrupts : The interrupt line from the SPAcc.
13 - ref-clock : The input clock that drives the SPAcc.
14
15Example SPAcc node:
16
17spacc@10000 {
18 compatible = "picochip,spacc-ipsec";
19 reg = <0x100000 0x10000>;
20 interrupt-parent = <&vic0>;
21 interrupts = <24>;
22 ref-clock = <&ipsec_clk>, "ref";
23};
diff --git a/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
new file mode 100644
index 000000000000..f3cf43b66f7e
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt
@@ -0,0 +1,25 @@
1* Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
2
3Required properties:
4- compatible : Should be "fsl,<chip>-i2c"
5- reg : Should contain I2C/HS-I2C registers location and length
6- interrupts : Should contain I2C/HS-I2C interrupt
7
8Optional properties:
9- clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
10 The absence of the propoerty indicates the default frequency 100 kHz.
11
12Examples:
13
14i2c@83fc4000 { /* I2C2 on i.MX51 */
15 compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
16 reg = <0x83fc4000 0x4000>;
17 interrupts = <63>;
18};
19
20i2c@70038000 { /* HS-I2C on i.MX51 */
21 compatible = "fsl,imx51-i2c", "fsl,imx1-i2c";
22 reg = <0x70038000 0x4000>;
23 interrupts = <64>;
24 clock-frequency = <400000>;
25};
diff --git a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt
new file mode 100644
index 000000000000..38832c712919
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt
@@ -0,0 +1,39 @@
1* Samsung's I2C controller
2
3The Samsung's I2C controller is used to interface with I2C devices.
4
5Required properties:
6 - compatible: value should be either of the following.
7 (a) "samsung, s3c2410-i2c", for i2c compatible with s3c2410 i2c.
8 (b) "samsung, s3c2440-i2c", for i2c compatible with s3c2440 i2c.
9 - reg: physical base address of the controller and length of memory mapped
10 region.
11 - interrupts: interrupt number to the cpu.
12 - samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges.
13 - gpios: The order of the gpios should be the following: <SDA, SCL>.
14 The gpio specifier depends on the gpio controller.
15
16Optional properties:
17 - samsung,i2c-slave-addr: Slave address in multi-master enviroment. If not
18 specified, default value is 0.
19 - samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not
20 specified, the default value in Hz is 100000.
21
22Example:
23
24 i2c@13870000 {
25 compatible = "samsung,s3c2440-i2c";
26 reg = <0x13870000 0x100>;
27 interrupts = <345>;
28 samsung,i2c-sda-delay = <100>;
29 samsung,i2c-max-bus-freq = <100000>;
30 gpios = <&gpd1 2 0 /* SDA */
31 &gpd1 3 0 /* SCL */>;
32 #address-cells = <1>;
33 #size-cells = <0>;
34
35 wm8994@1a {
36 compatible = "wlf,wm8994";
37 reg = <0x1a>;
38 };
39 };
diff --git a/Documentation/devicetree/bindings/pinmux/pinmux_nvidia.txt b/Documentation/devicetree/bindings/pinmux/pinmux_nvidia.txt
new file mode 100644
index 000000000000..36f82dbdd14d
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinmux/pinmux_nvidia.txt
@@ -0,0 +1,5 @@
1NVIDIA Tegra 2 pinmux controller
2
3Required properties:
4- compatible : "nvidia,tegra20-pinmux"
5
diff --git a/Documentation/devicetree/bindings/tty/serial/msm_serial.txt b/Documentation/devicetree/bindings/tty/serial/msm_serial.txt
new file mode 100644
index 000000000000..aef383eb8876
--- /dev/null
+++ b/Documentation/devicetree/bindings/tty/serial/msm_serial.txt
@@ -0,0 +1,27 @@
1* Qualcomm MSM UART
2
3Required properties:
4- compatible :
5 - "qcom,msm-uart", and one of "qcom,msm-hsuart" or
6 "qcom,msm-lsuart".
7- reg : offset and length of the register set for the device
8 for the hsuart operating in compatible mode, there should be a
9 second pair describing the gsbi registers.
10- interrupts : should contain the uart interrupt.
11
12There are two different UART blocks used in MSM devices,
13"qcom,msm-hsuart" and "qcom,msm-lsuart". The msm-serial driver is
14able to handle both of these, and matches against the "qcom,msm-uart"
15as the compatibility.
16
17The registers for the "qcom,msm-hsuart" device need to specify both
18register blocks, even for the common driver.
19
20Example:
21
22 uart@19c400000 {
23 compatible = "qcom,msm-hsuart", "qcom,msm-uart";
24 reg = <0x19c40000 0x1000>,
25 <0x19c00000 0x1000>;
26 interrupts = <195>;
27 };
diff --git a/Documentation/devicetree/bindings/virtio/mmio.txt b/Documentation/devicetree/bindings/virtio/mmio.txt
new file mode 100644
index 000000000000..5069c1b8e193
--- /dev/null
+++ b/Documentation/devicetree/bindings/virtio/mmio.txt
@@ -0,0 +1,17 @@
1* virtio memory mapped device
2
3See http://ozlabs.org/~rusty/virtio-spec/ for more details.
4
5Required properties:
6
7- compatible: "virtio,mmio" compatibility string
8- reg: control registers base address and size including configuration space
9- interrupts: interrupt generated by the device
10
11Example:
12
13 virtio_block@3000 {
14 compatible = "virtio,mmio";
15 reg = <0x3000 0x100>;
16 interrupts = <41>;
17 }
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 7c799fc5b88e..3d849122b5b1 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -133,41 +133,6 @@ Who: Pavel Machek <pavel@ucw.cz>
133 133
134--------------------------- 134---------------------------
135 135
136What: sys_sysctl
137When: September 2010
138Option: CONFIG_SYSCTL_SYSCALL
139Why: The same information is available in a more convenient from
140 /proc/sys, and none of the sysctl variables appear to be
141 important performance wise.
142
143 Binary sysctls are a long standing source of subtle kernel
144 bugs and security issues.
145
146 When I looked several months ago all I could find after
147 searching several distributions were 5 user space programs and
148 glibc (which falls back to /proc/sys) using this syscall.
149
150 The man page for sysctl(2) documents it as unusable for user
151 space programs.
152
153 sysctl(2) is not generally ABI compatible to a 32bit user
154 space application on a 64bit and a 32bit kernel.
155
156 For the last several months the policy has been no new binary
157 sysctls and no one has put forward an argument to use them.
158
159 Binary sysctls issues seem to keep happening appearing so
160 properly deprecating them (with a warning to user space) and a
161 2 year grace warning period will mean eventually we can kill
162 them and end the pain.
163
164 In the mean time individual binary sysctls can be dealt with
165 in a piecewise fashion.
166
167Who: Eric Biederman <ebiederm@xmission.com>
168
169---------------------------
170
171What: /proc/<pid>/oom_adj 136What: /proc/<pid>/oom_adj
172When: August 2012 137When: August 2012
173Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's 138Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 653380793a6c..d819ba16a0c7 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -29,6 +29,7 @@ d_hash no no no maybe
29d_compare: yes no no maybe 29d_compare: yes no no maybe
30d_delete: no yes no no 30d_delete: no yes no no
31d_release: no no yes no 31d_release: no no yes no
32d_prune: no yes no no
32d_iput: no no yes no 33d_iput: no no yes no
33d_dname: no no no no 34d_dname: no no no no
34d_automount: no no yes no 35d_automount: no no yes no
diff --git a/Documentation/filesystems/ext3.txt b/Documentation/filesystems/ext3.txt
index 22f3a0eda1d2..b100adc38adb 100644
--- a/Documentation/filesystems/ext3.txt
+++ b/Documentation/filesystems/ext3.txt
@@ -73,14 +73,6 @@ nobarrier (*) This also requires an IO stack which can support
73 also be used to enable or disable barriers, for 73 also be used to enable or disable barriers, for
74 consistency with other ext3 mount options. 74 consistency with other ext3 mount options.
75 75
76orlov (*) This enables the new Orlov block allocator. It is
77 enabled by default.
78
79oldalloc This disables the Orlov block allocator and enables
80 the old block allocator. Orlov should have better
81 performance - we'd like to get some feedback if it's
82 the contrary for you.
83
84user_xattr Enables Extended User Attributes. Additionally, you 76user_xattr Enables Extended User Attributes. Additionally, you
85 need to have extended attribute support enabled in the 77 need to have extended attribute support enabled in the
86 kernel configuration (CONFIG_EXT3_FS_XATTR). See the 78 kernel configuration (CONFIG_EXT3_FS_XATTR). See the
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 232a575a0c48..4917cf24a5e0 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -160,7 +160,9 @@ noload if the filesystem was not unmounted cleanly,
160 lead to any number of problems. 160 lead to any number of problems.
161 161
162data=journal All data are committed into the journal prior to being 162data=journal All data are committed into the journal prior to being
163 written into the main file system. 163 written into the main file system. Enabling
164 this mode will disable delayed allocation and
165 O_DIRECT support.
164 166
165data=ordered (*) All data are forced directly out to the main file 167data=ordered (*) All data are forced directly out to the main file
166 system prior to its metadata being committed to the 168 system prior to its metadata being committed to the
@@ -201,30 +203,19 @@ inode_readahead_blks=n This tuning parameter controls the maximum
201 table readahead algorithm will pre-read into 203 table readahead algorithm will pre-read into
202 the buffer cache. The default value is 32 blocks. 204 the buffer cache. The default value is 32 blocks.
203 205
204orlov (*) This enables the new Orlov block allocator. It is 206nouser_xattr Disables Extended User Attributes. If you have extended
205 enabled by default. 207 attribute support enabled in the kernel configuration
206 208 (CONFIG_EXT4_FS_XATTR), extended attribute support
207oldalloc This disables the Orlov block allocator and enables 209 is enabled by default on mount. See the attr(5) manual
208 the old block allocator. Orlov should have better 210 page and http://acl.bestbits.at/ for more information
209 performance - we'd like to get some feedback if it's 211 about extended attributes.
210 the contrary for you.
211
212user_xattr Enables Extended User Attributes. Additionally, you
213 need to have extended attribute support enabled in the
214 kernel configuration (CONFIG_EXT4_FS_XATTR). See the
215 attr(5) manual page and http://acl.bestbits.at/ to
216 learn more about extended attributes.
217
218nouser_xattr Disables Extended User Attributes.
219
220acl Enables POSIX Access Control Lists support.
221 Additionally, you need to have ACL support enabled in
222 the kernel configuration (CONFIG_EXT4_FS_POSIX_ACL).
223 See the acl(5) manual page and http://acl.bestbits.at/
224 for more information.
225 212
226noacl This option disables POSIX Access Control List 213noacl This option disables POSIX Access Control List
227 support. 214 support. If ACL support is enabled in the kernel
215 configuration (CONFIG_EXT4_FS_POSIX_ACL), ACL is
216 enabled by default on mount. See the acl(5) manual
217 page and http://acl.bestbits.at/ for more information
218 about acl.
228 219
229bsddf (*) Make 'df' act like BSD. 220bsddf (*) Make 'df' act like BSD.
230minixdf Make 'df' act like Minix. 221minixdf Make 'df' act like Minix.
@@ -419,8 +410,8 @@ written to the journal first, and then to its final location.
419In the event of a crash, the journal can be replayed, bringing both data and 410In the event of a crash, the journal can be replayed, bringing both data and
420metadata into a consistent state. This mode is the slowest except when data 411metadata into a consistent state. This mode is the slowest except when data
421needs to be read from and written to disk at the same time where it 412needs to be read from and written to disk at the same time where it
422outperforms all others modes. Currently ext4 does not have delayed 413outperforms all others modes. Enabling this mode will disable delayed
423allocation support if this data journalling mode is selected. 414allocation and O_DIRECT support.
424 415
425/proc entries 416/proc entries
426============= 417=============
diff --git a/Documentation/hwmon/w83627ehf b/Documentation/hwmon/w83627ehf
index 76ffef94ed75..3f44dbdfda70 100644
--- a/Documentation/hwmon/w83627ehf
+++ b/Documentation/hwmon/w83627ehf
@@ -14,6 +14,10 @@ Supported chips:
14 Prefix: 'w83627dhg' 14 Prefix: 'w83627dhg'
15 Addresses scanned: ISA address retrieved from Super I/O registers 15 Addresses scanned: ISA address retrieved from Super I/O registers
16 Datasheet: not available 16 Datasheet: not available
17 * Winbond W83627UHG
18 Prefix: 'w83627uhg'
19 Addresses scanned: ISA address retrieved from Super I/O registers
20 Datasheet: available from www.nuvoton.com
17 * Winbond W83667HG 21 * Winbond W83667HG
18 Prefix: 'w83667hg' 22 Prefix: 'w83667hg'
19 Addresses scanned: ISA address retrieved from Super I/O registers 23 Addresses scanned: ISA address retrieved from Super I/O registers
@@ -42,14 +46,13 @@ Description
42----------- 46-----------
43 47
44This driver implements support for the Winbond W83627EHF, W83627EHG, 48This driver implements support for the Winbond W83627EHF, W83627EHG,
45W83627DHG, W83627DHG-P, W83667HG, W83667HG-B, W83667HG-I (NCT6775F), 49W83627DHG, W83627DHG-P, W83627UHG, W83667HG, W83667HG-B, W83667HG-I
46and NCT6776F super I/O chips. We will refer to them collectively as 50(NCT6775F), and NCT6776F super I/O chips. We will refer to them collectively
47Winbond chips. 51as Winbond chips.
48 52
49The chips implement three temperature sensors (up to four for 667HG-B, and nine 53The chips implement 2 to 4 temperature sensors (9 for NCT6775F and NCT6776F),
50for NCT6775F and NCT6776F), five fan rotation speed sensors, ten analog voltage 542 to 5 fan rotation speed sensors, 8 to 10 analog voltage sensors, one VID
51sensors (only nine for the 627DHG), one VID (6 pins for the 627EHF/EHG, 8 pins 55(except for 627UHG), alarms with beep warnings (control unimplemented),
52for the 627DHG and 667HG), alarms with beep warnings (control unimplemented),
53and some automatic fan regulation strategies (plus manual fan control mode). 56and some automatic fan regulation strategies (plus manual fan control mode).
54 57
55The temperature sensor sources on W82677HG-B, NCT6775F, and NCT6776F are 58The temperature sensor sources on W82677HG-B, NCT6775F, and NCT6776F are
@@ -86,17 +89,16 @@ follows:
86 89
87temp1 -> pwm1 90temp1 -> pwm1
88temp2 -> pwm2 91temp2 -> pwm2
89temp3 -> pwm3 92temp3 -> pwm3 (not on 627UHG)
90prog -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not 93prog -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not
91 supported by the driver) 94 supported by the driver)
92 95
93/sys files 96/sys files
94---------- 97----------
95 98
96name - this is a standard hwmon device entry. For the W83627EHF and W83627EHG, 99name - this is a standard hwmon device entry, it contains the name of
97 it is set to "w83627ehf", for the W83627DHG it is set to "w83627dhg", 100 the device (see the prefix in the list of supported devices at
98 for the W83667HG and W83667HG-B it is set to "w83667hg", for NCT6775F it 101 the top of this file)
99 is set to "nct6775", and for NCT6776F it is set to "nct6776".
100 102
101pwm[1-4] - this file stores PWM duty cycle or DC value (fan speed) in range: 103pwm[1-4] - this file stores PWM duty cycle or DC value (fan speed) in range:
102 0 (stop) to 255 (full) 104 0 (stop) to 255 (full)
diff --git a/Documentation/hwspinlock.txt b/Documentation/hwspinlock.txt
index 7dcd1a4e726c..a903ee5e9776 100644
--- a/Documentation/hwspinlock.txt
+++ b/Documentation/hwspinlock.txt
@@ -39,23 +39,20 @@ independent, drivers.
39 in case an unused hwspinlock isn't available. Users of this 39 in case an unused hwspinlock isn't available. Users of this
40 API will usually want to communicate the lock's id to the remote core 40 API will usually want to communicate the lock's id to the remote core
41 before it can be used to achieve synchronization. 41 before it can be used to achieve synchronization.
42 Can be called from an atomic context (this function will not sleep) but 42 Should be called from a process context (might sleep).
43 not from within interrupt context.
44 43
45 struct hwspinlock *hwspin_lock_request_specific(unsigned int id); 44 struct hwspinlock *hwspin_lock_request_specific(unsigned int id);
46 - assign a specific hwspinlock id and return its address, or NULL 45 - assign a specific hwspinlock id and return its address, or NULL
47 if that hwspinlock is already in use. Usually board code will 46 if that hwspinlock is already in use. Usually board code will
48 be calling this function in order to reserve specific hwspinlock 47 be calling this function in order to reserve specific hwspinlock
49 ids for predefined purposes. 48 ids for predefined purposes.
50 Can be called from an atomic context (this function will not sleep) but 49 Should be called from a process context (might sleep).
51 not from within interrupt context.
52 50
53 int hwspin_lock_free(struct hwspinlock *hwlock); 51 int hwspin_lock_free(struct hwspinlock *hwlock);
54 - free a previously-assigned hwspinlock; returns 0 on success, or an 52 - free a previously-assigned hwspinlock; returns 0 on success, or an
55 appropriate error code on failure (e.g. -EINVAL if the hwspinlock 53 appropriate error code on failure (e.g. -EINVAL if the hwspinlock
56 is already free). 54 is already free).
57 Can be called from an atomic context (this function will not sleep) but 55 Should be called from a process context (might sleep).
58 not from within interrupt context.
59 56
60 int hwspin_lock_timeout(struct hwspinlock *hwlock, unsigned int timeout); 57 int hwspin_lock_timeout(struct hwspinlock *hwlock, unsigned int timeout);
61 - lock a previously-assigned hwspinlock with a timeout limit (specified in 58 - lock a previously-assigned hwspinlock with a timeout limit (specified in
@@ -230,45 +227,62 @@ int hwspinlock_example2(void)
230 227
2314. API for implementors 2284. API for implementors
232 229
233 int hwspin_lock_register(struct hwspinlock *hwlock); 230 int hwspin_lock_register(struct hwspinlock_device *bank, struct device *dev,
231 const struct hwspinlock_ops *ops, int base_id, int num_locks);
234 - to be called from the underlying platform-specific implementation, in 232 - to be called from the underlying platform-specific implementation, in
235 order to register a new hwspinlock instance. Can be called from an atomic 233 order to register a new hwspinlock device (which is usually a bank of
236 context (this function will not sleep) but not from within interrupt 234 numerous locks). Should be called from a process context (this function
237 context. Returns 0 on success, or appropriate error code on failure. 235 might sleep).
236 Returns 0 on success, or appropriate error code on failure.
238 237
239 struct hwspinlock *hwspin_lock_unregister(unsigned int id); 238 int hwspin_lock_unregister(struct hwspinlock_device *bank);
240 - to be called from the underlying vendor-specific implementation, in order 239 - to be called from the underlying vendor-specific implementation, in order
241 to unregister an existing (and unused) hwspinlock instance. 240 to unregister an hwspinlock device (which is usually a bank of numerous
242 Can be called from an atomic context (will not sleep) but not from 241 locks).
243 within interrupt context. 242 Should be called from a process context (this function might sleep).
244 Returns the address of hwspinlock on success, or NULL on error (e.g. 243 Returns the address of hwspinlock on success, or NULL on error (e.g.
245 if the hwspinlock is sill in use). 244 if the hwspinlock is sill in use).
246 245
2475. struct hwspinlock 2465. Important structs
248 247
249This struct represents an hwspinlock instance. It is registered by the 248struct hwspinlock_device is a device which usually contains a bank
250underlying hwspinlock implementation using the hwspin_lock_register() API. 249of hardware locks. It is registered by the underlying hwspinlock
250implementation using the hwspin_lock_register() API.
251 251
252/** 252/**
253 * struct hwspinlock - vendor-specific hwspinlock implementation 253 * struct hwspinlock_device - a device which usually spans numerous hwspinlocks
254 * 254 * @dev: underlying device, will be used to invoke runtime PM api
255 * @dev: underlying device, will be used with runtime PM api 255 * @ops: platform-specific hwspinlock handlers
256 * @ops: vendor-specific hwspinlock handlers 256 * @base_id: id index of the first lock in this device
257 * @id: a global, unique, system-wide, index of the lock. 257 * @num_locks: number of locks in this device
258 * @lock: initialized and used by hwspinlock core 258 * @lock: dynamically allocated array of 'struct hwspinlock'
259 * @owner: underlying implementation module, used to maintain module ref count
260 */ 259 */
261struct hwspinlock { 260struct hwspinlock_device {
262 struct device *dev; 261 struct device *dev;
263 const struct hwspinlock_ops *ops; 262 const struct hwspinlock_ops *ops;
264 int id; 263 int base_id;
264 int num_locks;
265 struct hwspinlock lock[0];
266};
267
268struct hwspinlock_device contains an array of hwspinlock structs, each
269of which represents a single hardware lock:
270
271/**
272 * struct hwspinlock - this struct represents a single hwspinlock instance
273 * @bank: the hwspinlock_device structure which owns this lock
274 * @lock: initialized and used by hwspinlock core
275 * @priv: private data, owned by the underlying platform-specific hwspinlock drv
276 */
277struct hwspinlock {
278 struct hwspinlock_device *bank;
265 spinlock_t lock; 279 spinlock_t lock;
266 struct module *owner; 280 void *priv;
267}; 281};
268 282
269The underlying implementation is responsible to assign the dev, ops, id and 283When registering a bank of locks, the hwspinlock driver only needs to
270owner members. The lock member, OTOH, is initialized and used by the hwspinlock 284set the priv members of the locks. The rest of the members are set and
271core. 285initialized by the hwspinlock core itself.
272 286
2736. Implementation callbacks 2876. Implementation callbacks
274 288
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 27e0488d54d2..a0c5c5f4fce6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -741,10 +741,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
741 See Documentation/block/cfq-iosched.txt and 741 See Documentation/block/cfq-iosched.txt and
742 Documentation/block/deadline-iosched.txt for details. 742 Documentation/block/deadline-iosched.txt for details.
743 743
744 elfcorehdr= [IA-64,PPC,SH,X86] 744 elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
745 Specifies physical address of start of kernel core 745 Specifies physical address of start of kernel core
746 image elf header. Generally kexec loader will 746 image elf header and optionally the size. Generally
747 pass this option to capture kernel. 747 kexec loader will pass this option to capture kernel.
748 See Documentation/kdump/kdump.txt for details. 748 See Documentation/kdump/kdump.txt for details.
749 749
750 enable_mtrr_cleanup [X86] 750 enable_mtrr_cleanup [X86]
@@ -973,6 +973,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
973 ignore_loglevel [KNL] 973 ignore_loglevel [KNL]
974 Ignore loglevel setting - this will print /all/ 974 Ignore loglevel setting - this will print /all/
975 kernel messages to the console. Useful for debugging. 975 kernel messages to the console. Useful for debugging.
976 We also add it as printk module parameter, so users
977 could change it dynamically, usually by
978 /sys/module/printk/parameters/ignore_loglevel.
976 979
977 ihash_entries= [KNL] 980 ihash_entries= [KNL]
978 Set number of hash buckets for inode cache. 981 Set number of hash buckets for inode cache.
@@ -1666,6 +1669,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
1666 debugging driver suspend/resume hooks). This may 1669 debugging driver suspend/resume hooks). This may
1667 not work reliably with all consoles, but is known 1670 not work reliably with all consoles, but is known
1668 to work with serial and VGA consoles. 1671 to work with serial and VGA consoles.
1672 To facilitate more flexible debugging, we also add
1673 console_suspend, a printk module parameter to control
1674 it. Users could use console_suspend (usually
1675 /sys/module/printk/parameters/console_suspend) to
1676 turn on/off it dynamically.
1669 1677
1670 noaliencache [MM, NUMA, SLAB] Disables the allocation of alien 1678 noaliencache [MM, NUMA, SLAB] Disables the allocation of alien
1671 caches in the slab allocator. Saves per-node memory, 1679 caches in the slab allocator. Saves per-node memory,
diff --git a/Documentation/networking/ipvs-sysctl.txt b/Documentation/networking/ipvs-sysctl.txt
index 4ccdbca03811..f2a2488f1bf3 100644
--- a/Documentation/networking/ipvs-sysctl.txt
+++ b/Documentation/networking/ipvs-sysctl.txt
@@ -15,6 +15,23 @@ amemthresh - INTEGER
15 enabled and the variable is automatically set to 2, otherwise 15 enabled and the variable is automatically set to 2, otherwise
16 the strategy is disabled and the variable is set to 1. 16 the strategy is disabled and the variable is set to 1.
17 17
18conntrack - BOOLEAN
19 0 - disabled (default)
20 not 0 - enabled
21
22 If set, maintain connection tracking entries for
23 connections handled by IPVS.
24
25 This should be enabled if connections handled by IPVS are to be
26 also handled by stateful firewall rules. That is, iptables rules
27 that make use of connection tracking. It is a performance
28 optimisation to disable this setting otherwise.
29
30 Connections handled by the IPVS FTP application module
31 will have connection tracking entries regardless of this setting.
32
33 Only available when IPVS is compiled with CONFIG_IP_VS_NFCT enabled.
34
18cache_bypass - BOOLEAN 35cache_bypass - BOOLEAN
19 0 - disabled (default) 36 0 - disabled (default)
20 not 0 - enabled 37 not 0 - enabled
@@ -39,7 +56,7 @@ debug_level - INTEGER
39 11 - IPVS packet handling (ip_vs_in/ip_vs_out) 56 11 - IPVS packet handling (ip_vs_in/ip_vs_out)
40 12 or more - packet traversal 57 12 or more - packet traversal
41 58
42 Only available when IPVS is compiled with the CONFIG_IPVS_DEBUG 59 Only available when IPVS is compiled with CONFIG_IP_VS_DEBUG enabled.
43 60
44 Higher debugging levels include the messages for lower debugging 61 Higher debugging levels include the messages for lower debugging
45 levels, so setting debug level 2, includes level 0, 1 and 2 62 levels, so setting debug level 2, includes level 0, 1 and 2
@@ -123,13 +140,11 @@ nat_icmp_send - BOOLEAN
123secure_tcp - INTEGER 140secure_tcp - INTEGER
124 0 - disabled (default) 141 0 - disabled (default)
125 142
126 The secure_tcp defense is to use a more complicated state 143 The secure_tcp defense is to use a more complicated TCP state
127 transition table and some possible short timeouts of each 144 transition table. For VS/NAT, it also delays entering the
128 state. In the VS/NAT, it delays the entering the ESTABLISHED 145 TCP ESTABLISHED state until the three way handshake is completed.
129 until the real server starts to send data and ACK packet
130 (after 3-way handshake).
131 146
132 The value definition is the same as that of drop_entry or 147 The value definition is the same as that of drop_entry and
133 drop_packet. 148 drop_packet.
134 149
135sync_threshold - INTEGER 150sync_threshold - INTEGER
@@ -141,3 +156,36 @@ sync_threshold - INTEGER
141 synchronized, every time the number of its incoming packets 156 synchronized, every time the number of its incoming packets
142 modulus 50 equals the threshold. The range of the threshold is 157 modulus 50 equals the threshold. The range of the threshold is
143 from 0 to 49. 158 from 0 to 49.
159
160snat_reroute - BOOLEAN
161 0 - disabled
162 not 0 - enabled (default)
163
164 If enabled, recalculate the route of SNATed packets from
165 realservers so that they are routed as if they originate from the
166 director. Otherwise they are routed as if they are forwarded by the
167 director.
168
169 If policy routing is in effect then it is possible that the route
170 of a packet originating from a director is routed differently to a
171 packet being forwarded by the director.
172
173 If policy routing is not in effect then the recalculated route will
174 always be the same as the original route so it is an optimisation
175 to disable snat_reroute and avoid the recalculation.
176
177sync_version - INTEGER
178 default 1
179
180 The version of the synchronisation protocol used when sending
181 synchronisation messages.
182
183 0 selects the original synchronisation protocol (version 0). This
184 should be used when sending synchronisation messages to a legacy
185 system that only understands the original synchronisation protocol.
186
187 1 selects the current synchronisation protocol (version 1). This
188 should be used where possible.
189
190 Kernels with this sync_version entry are able to receive messages
191 of both version 1 and version 2 of the synchronisation protocol.
diff --git a/Documentation/power/regulator/machine.txt b/Documentation/power/regulator/machine.txt
index b42419b52e44..ce63af0a8e35 100644
--- a/Documentation/power/regulator/machine.txt
+++ b/Documentation/power/regulator/machine.txt
@@ -16,7 +16,7 @@ initialisation code by creating a struct regulator_consumer_supply for
16each regulator. 16each regulator.
17 17
18struct regulator_consumer_supply { 18struct regulator_consumer_supply {
19 struct device *dev; /* consumer */ 19 const char *dev_name; /* consumer dev_name() */
20 const char *supply; /* consumer supply - e.g. "vcc" */ 20 const char *supply; /* consumer supply - e.g. "vcc" */
21}; 21};
22 22
@@ -24,13 +24,13 @@ e.g. for the machine above
24 24
25static struct regulator_consumer_supply regulator1_consumers[] = { 25static struct regulator_consumer_supply regulator1_consumers[] = {
26{ 26{
27 .dev = &platform_consumerB_device.dev, 27 .dev_name = "dev_name(consumer B)",
28 .supply = "Vcc", 28 .supply = "Vcc",
29},}; 29},};
30 30
31static struct regulator_consumer_supply regulator2_consumers[] = { 31static struct regulator_consumer_supply regulator2_consumers[] = {
32{ 32{
33 .dev = &platform_consumerA_device.dev, 33 .dev = "dev_name(consumer A"),
34 .supply = "Vcc", 34 .supply = "Vcc",
35},}; 35},};
36 36
@@ -43,6 +43,7 @@ to their supply regulator :-
43 43
44static struct regulator_init_data regulator1_data = { 44static struct regulator_init_data regulator1_data = {
45 .constraints = { 45 .constraints = {
46 .name = "Regulator-1",
46 .min_uV = 3300000, 47 .min_uV = 3300000,
47 .max_uV = 3300000, 48 .max_uV = 3300000,
48 .valid_modes_mask = REGULATOR_MODE_NORMAL, 49 .valid_modes_mask = REGULATOR_MODE_NORMAL,
@@ -51,13 +52,19 @@ static struct regulator_init_data regulator1_data = {
51 .consumer_supplies = regulator1_consumers, 52 .consumer_supplies = regulator1_consumers,
52}; 53};
53 54
55The name field should be set to something that is usefully descriptive
56for the board for configuration of supplies for other regulators and
57for use in logging and other diagnostic output. Normally the name
58used for the supply rail in the schematic is a good choice. If no
59name is provided then the subsystem will choose one.
60
54Regulator-1 supplies power to Regulator-2. This relationship must be registered 61Regulator-1 supplies power to Regulator-2. This relationship must be registered
55with the core so that Regulator-1 is also enabled when Consumer A enables its 62with the core so that Regulator-1 is also enabled when Consumer A enables its
56supply (Regulator-2). The supply regulator is set by the supply_regulator 63supply (Regulator-2). The supply regulator is set by the supply_regulator
57field below:- 64field below and co:-
58 65
59static struct regulator_init_data regulator2_data = { 66static struct regulator_init_data regulator2_data = {
60 .supply_regulator = "regulator_name", 67 .supply_regulator = "Regulator-1",
61 .constraints = { 68 .constraints = {
62 .min_uV = 1800000, 69 .min_uV = 1800000,
63 .max_uV = 2000000, 70 .max_uV = 2000000,
diff --git a/Documentation/rapidio/rapidio.txt b/Documentation/rapidio/rapidio.txt
index be70ee15f8ca..c75694b35d08 100644
--- a/Documentation/rapidio/rapidio.txt
+++ b/Documentation/rapidio/rapidio.txt
@@ -144,7 +144,7 @@ and the default device ID in order to access the device on the active port.
144 144
145After the host has completed enumeration of the entire network it releases 145After the host has completed enumeration of the entire network it releases
146devices by clearing device ID locks (calls rio_clear_locks()). For each endpoint 146devices by clearing device ID locks (calls rio_clear_locks()). For each endpoint
147in the system, it sets the Master Enable bit in the Port General Control CSR 147in the system, it sets the Discovered bit in the Port General Control CSR
148to indicate that enumeration is completed and agents are allowed to execute 148to indicate that enumeration is completed and agents are allowed to execute
149passive discovery of the network. 149passive discovery of the network.
150 150
diff --git a/Documentation/rapidio/tsi721.txt b/Documentation/rapidio/tsi721.txt
new file mode 100644
index 000000000000..335f3c6087dc
--- /dev/null
+++ b/Documentation/rapidio/tsi721.txt
@@ -0,0 +1,49 @@
1RapidIO subsystem mport driver for IDT Tsi721 PCI Express-to-SRIO bridge.
2=========================================================================
3
4I. Overview
5
6This driver implements all currently defined RapidIO mport callback functions.
7It supports maintenance read and write operations, inbound and outbound RapidIO
8doorbells, inbound maintenance port-writes and RapidIO messaging.
9
10To generate SRIO maintenance transactions this driver uses one of Tsi721 DMA
11channels. This mechanism provides access to larger range of hop counts and
12destination IDs without need for changes in outbound window translation.
13
14RapidIO messaging support uses dedicated messaging channels for each mailbox.
15For inbound messages this driver uses destination ID matching to forward messages
16into the corresponding message queue. Messaging callbacks are implemented to be
17fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
18
19II. Known problems
20
21 None.
22
23III. To do
24
25 Add DMA data transfers (non-messaging).
26 Add inbound region (SRIO-to-PCIe) mapping.
27
28IV. Version History
29
30 1.0.0 - Initial driver release.
31
32V. License
33-----------------------------------------------
34
35 Copyright(c) 2011 Integrated Device Technology, Inc. All rights reserved.
36
37 This program is free software; you can redistribute it and/or modify it
38 under the terms of the GNU General Public License as published by the Free
39 Software Foundation; either version 2 of the License, or (at your option)
40 any later version.
41
42 This program is distributed in the hope that it will be useful, but WITHOUT
43 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
44 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
45 more details.
46
47 You should have received a copy of the GNU General Public License along with
48 this program; if not, write to the Free Software Foundation, Inc.,
49 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 704e474a93df..1f2463671a1a 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -24,6 +24,7 @@ show up in /proc/sys/kernel:
24- bootloader_type [ X86 only ] 24- bootloader_type [ X86 only ]
25- bootloader_version [ X86 only ] 25- bootloader_version [ X86 only ]
26- callhome [ S390 only ] 26- callhome [ S390 only ]
27- cap_last_cap
27- core_pattern 28- core_pattern
28- core_pipe_limit 29- core_pipe_limit
29- core_uses_pid 30- core_uses_pid
@@ -155,6 +156,13 @@ on has a service contract with IBM.
155 156
156============================================================== 157==============================================================
157 158
159cap_last_cap
160
161Highest valid capability of the running kernel. Exports
162CAP_LAST_CAP from the kernel.
163
164==============================================================
165
158core_pattern: 166core_pattern:
159 167
160core_pattern is used to specify a core dumpfile pattern name. 168core_pattern is used to specify a core dumpfile pattern name.
diff --git a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
index 12cecc83cd91..4a37c4759cd2 100644
--- a/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
+++ b/Documentation/trace/postprocess/trace-vmscan-postprocess.pl
@@ -379,10 +379,10 @@ EVENT_PROCESS:
379 379
380 # To closer match vmstat scanning statistics, only count isolate_both 380 # To closer match vmstat scanning statistics, only count isolate_both
381 # and isolate_inactive as scanning. isolate_active is rotation 381 # and isolate_inactive as scanning. isolate_active is rotation
382 # isolate_inactive == 0 382 # isolate_inactive == 1
383 # isolate_active == 1 383 # isolate_active == 2
384 # isolate_both == 2 384 # isolate_both == 3
385 if ($isolate_mode != 1) { 385 if ($isolate_mode != 2) {
386 $perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned; 386 $perprocesspid{$process_pid}->{HIGH_NR_SCANNED} += $nr_scanned;
387 } 387 }
388 $perprocesspid{$process_pid}->{HIGH_NR_CONTIG_DIRTY} += $nr_contig_dirty; 388 $perprocesspid{$process_pid}->{HIGH_NR_CONTIG_DIRTY} += $nr_contig_dirty;
diff --git a/Documentation/virtual/uml/UserModeLinux-HOWTO.txt b/Documentation/virtual/uml/UserModeLinux-HOWTO.txt
index 5d0fc8bfcdb9..77dfecf4e2d6 100644
--- a/Documentation/virtual/uml/UserModeLinux-HOWTO.txt
+++ b/Documentation/virtual/uml/UserModeLinux-HOWTO.txt
@@ -134,13 +134,13 @@
134 134
135 ______________________________________________________________________ 135 ______________________________________________________________________
136 136
137 11.. IInnttrroodduuccttiioonn 137 1. Introduction
138 138
139 Welcome to User Mode Linux. It's going to be fun. 139 Welcome to User Mode Linux. It's going to be fun.
140 140
141 141
142 142
143 11..11.. HHooww iiss UUsseerr MMooddee LLiinnuuxx DDiiffffeerreenntt?? 143 1.1. How is User Mode Linux Different?
144 144
145 Normally, the Linux Kernel talks straight to your hardware (video 145 Normally, the Linux Kernel talks straight to your hardware (video
146 card, keyboard, hard drives, etc), and any programs which run ask the 146 card, keyboard, hard drives, etc), and any programs which run ask the
@@ -181,7 +181,7 @@
181 181
182 182
183 183
184 11..22.. WWhhyy WWoouulldd II WWaanntt UUsseerr MMooddee LLiinnuuxx?? 184 1.2. Why Would I Want User Mode Linux?
185 185
186 186
187 1. If User Mode Linux crashes, your host kernel is still fine. 187 1. If User Mode Linux crashes, your host kernel is still fine.
@@ -206,12 +206,12 @@
206 206
207 207
208 208
209 22.. CCoommppiilliinngg tthhee kkeerrnneell aanndd mmoodduulleess 209 2. Compiling the kernel and modules
210 210
211 211
212 212
213 213
214 22..11.. CCoommppiilliinngg tthhee kkeerrnneell 214 2.1. Compiling the kernel
215 215
216 216
217 Compiling the user mode kernel is just like compiling any other 217 Compiling the user mode kernel is just like compiling any other
@@ -322,7 +322,7 @@
322 bug fixes and enhancements that have gone into subsequent releases. 322 bug fixes and enhancements that have gone into subsequent releases.
323 323
324 324
325 22..22.. CCoommppiilliinngg aanndd iinnssttaalllliinngg kkeerrnneell mmoodduulleess 325 2.2. Compiling and installing kernel modules
326 326
327 UML modules are built in the same way as the native kernel (with the 327 UML modules are built in the same way as the native kernel (with the
328 exception of the 'ARCH=um' that you always need for UML): 328 exception of the 'ARCH=um' that you always need for UML):
@@ -386,19 +386,19 @@
386 386
387 387
388 388
389 22..33.. CCoommppiilliinngg aanndd iinnssttaalllliinngg uummll__uuttiilliittiieess 389 2.3. Compiling and installing uml_utilities
390 390
391 Many features of the UML kernel require a user-space helper program, 391 Many features of the UML kernel require a user-space helper program,
392 so a uml_utilities package is distributed separately from the kernel 392 so a uml_utilities package is distributed separately from the kernel
393 patch which provides these helpers. Included within this is: 393 patch which provides these helpers. Included within this is:
394 394
395 +o port-helper - Used by consoles which connect to xterms or ports 395 o port-helper - Used by consoles which connect to xterms or ports
396 396
397 +o tunctl - Configuration tool to create and delete tap devices 397 o tunctl - Configuration tool to create and delete tap devices
398 398
399 +o uml_net - Setuid binary for automatic tap device configuration 399 o uml_net - Setuid binary for automatic tap device configuration
400 400
401 +o uml_switch - User-space virtual switch required for daemon 401 o uml_switch - User-space virtual switch required for daemon
402 transport 402 transport
403 403
404 The uml_utilities tree is compiled with: 404 The uml_utilities tree is compiled with:
@@ -423,11 +423,11 @@
423 423
424 424
425 425
426 33.. RRuunnnniinngg UUMMLL aanndd llooggggiinngg iinn 426 3. Running UML and logging in
427 427
428 428
429 429
430 33..11.. RRuunnnniinngg UUMMLL 430 3.1. Running UML
431 431
432 It runs on 2.2.15 or later, and all 2.4 kernels. 432 It runs on 2.2.15 or later, and all 2.4 kernels.
433 433
@@ -454,7 +454,7 @@
454 454
455 455
456 456
457 33..22.. LLooggggiinngg iinn 457 3.2. Logging in
458 458
459 459
460 460
@@ -468,7 +468,7 @@
468 468
469 There are a couple of other ways to log in: 469 There are a couple of other ways to log in:
470 470
471 +o On a virtual console 471 o On a virtual console
472 472
473 473
474 474
@@ -480,7 +480,7 @@
480 480
481 481
482 482
483 +o Over the serial line 483 o Over the serial line
484 484
485 485
486 In the boot output, find a line that looks like: 486 In the boot output, find a line that looks like:
@@ -503,7 +503,7 @@
503 503
504 504
505 505
506 +o Over the net 506 o Over the net
507 507
508 508
509 If the network is running, then you can telnet to the virtual 509 If the network is running, then you can telnet to the virtual
@@ -514,13 +514,13 @@
514 down and the process will exit. 514 down and the process will exit.
515 515
516 516
517 33..33.. EExxaammpplleess 517 3.3. Examples
518 518
519 Here are some examples of UML in action: 519 Here are some examples of UML in action:
520 520
521 +o A login session <http://user-mode-linux.sourceforge.net/login.html> 521 o A login session <http://user-mode-linux.sourceforge.net/login.html>
522 522
523 +o A virtual network <http://user-mode-linux.sourceforge.net/net.html> 523 o A virtual network <http://user-mode-linux.sourceforge.net/net.html>
524 524
525 525
526 526
@@ -528,12 +528,12 @@
528 528
529 529
530 530
531 44.. UUMMLL oonn 22GG//22GG hhoossttss 531 4. UML on 2G/2G hosts
532 532
533 533
534 534
535 535
536 44..11.. IInnttrroodduuccttiioonn 536 4.1. Introduction
537 537
538 538
539 Most Linux machines are configured so that the kernel occupies the 539 Most Linux machines are configured so that the kernel occupies the
@@ -546,7 +546,7 @@
546 546
547 547
548 548
549 44..22.. TThhee pprroobblleemm 549 4.2. The problem
550 550
551 551
552 The prebuilt UML binaries on this site will not run on 2G/2G hosts 552 The prebuilt UML binaries on this site will not run on 2G/2G hosts
@@ -558,7 +558,7 @@
558 558
559 559
560 560
561 44..33.. TThhee ssoolluuttiioonn 561 4.3. The solution
562 562
563 563
564 The fix for this is to rebuild UML from source after enabling 564 The fix for this is to rebuild UML from source after enabling
@@ -576,7 +576,7 @@
576 576
577 577
578 578
579 55.. SSeettttiinngg uupp sseerriiaall lliinneess aanndd ccoonnssoolleess 579 5. Setting up serial lines and consoles
580 580
581 581
582 It is possible to attach UML serial lines and consoles to many types 582 It is possible to attach UML serial lines and consoles to many types
@@ -586,12 +586,12 @@
586 You can attach them to host ptys, ttys, file descriptors, and ports. 586 You can attach them to host ptys, ttys, file descriptors, and ports.
587 This allows you to do things like 587 This allows you to do things like
588 588
589 +o have a UML console appear on an unused host console, 589 o have a UML console appear on an unused host console,
590 590
591 +o hook two virtual machines together by having one attach to a pty 591 o hook two virtual machines together by having one attach to a pty
592 and having the other attach to the corresponding tty 592 and having the other attach to the corresponding tty
593 593
594 +o make a virtual machine accessible from the net by attaching a 594 o make a virtual machine accessible from the net by attaching a
595 console to a port on the host. 595 console to a port on the host.
596 596
597 597
@@ -599,7 +599,7 @@
599 599
600 600
601 601
602 55..11.. SSppeecciiffyyiinngg tthhee ddeevviiccee 602 5.1. Specifying the device
603 603
604 Devices are specified with "con" or "ssl" (console or serial line, 604 Devices are specified with "con" or "ssl" (console or serial line,
605 respectively), optionally with a device number if you are talking 605 respectively), optionally with a device number if you are talking
@@ -626,13 +626,13 @@
626 626
627 627
628 628
629 55..22.. SSppeecciiffyyiinngg tthhee cchhaannnneell 629 5.2. Specifying the channel
630 630
631 There are a number of different types of channels to attach a UML 631 There are a number of different types of channels to attach a UML
632 device to, each with a different way of specifying exactly what to 632 device to, each with a different way of specifying exactly what to
633 attach to. 633 attach to.
634 634
635 +o pseudo-terminals - device=pty pts terminals - device=pts 635 o pseudo-terminals - device=pty pts terminals - device=pts
636 636
637 637
638 This will cause UML to allocate a free host pseudo-terminal for the 638 This will cause UML to allocate a free host pseudo-terminal for the
@@ -640,20 +640,20 @@
640 log. You access it by attaching a terminal program to the 640 log. You access it by attaching a terminal program to the
641 corresponding tty: 641 corresponding tty:
642 642
643 +o screen /dev/pts/n 643 o screen /dev/pts/n
644 644
645 +o screen /dev/ttyxx 645 o screen /dev/ttyxx
646 646
647 +o minicom -o -p /dev/ttyxx - minicom seems not able to handle pts 647 o minicom -o -p /dev/ttyxx - minicom seems not able to handle pts
648 devices 648 devices
649 649
650 +o kermit - start it up, 'open' the device, then 'connect' 650 o kermit - start it up, 'open' the device, then 'connect'
651 651
652 652
653 653
654 654
655 655
656 +o terminals - device=tty:tty device file 656 o terminals - device=tty:tty device file
657 657
658 658
659 This will make UML attach the device to the specified tty (i.e 659 This will make UML attach the device to the specified tty (i.e
@@ -672,7 +672,7 @@
672 672
673 673
674 674
675 +o xterms - device=xterm 675 o xterms - device=xterm
676 676
677 677
678 UML will run an xterm and the device will be attached to it. 678 UML will run an xterm and the device will be attached to it.
@@ -681,7 +681,7 @@
681 681
682 682
683 683
684 +o Port - device=port:port number 684 o Port - device=port:port number
685 685
686 686
687 This will attach the UML devices to the specified host port. 687 This will attach the UML devices to the specified host port.
@@ -725,7 +725,7 @@
725 725
726 726
727 727
728 +o already-existing file descriptors - device=file descriptor 728 o already-existing file descriptors - device=file descriptor
729 729
730 730
731 If you set up a file descriptor on the UML command line, you can 731 If you set up a file descriptor on the UML command line, you can
@@ -743,7 +743,7 @@
743 743
744 744
745 745
746 +o Nothing - device=null 746 o Nothing - device=null
747 747
748 748
749 This allows the device to be opened, in contrast to 'none', but 749 This allows the device to be opened, in contrast to 'none', but
@@ -754,7 +754,7 @@
754 754
755 755
756 756
757 +o None - device=none 757 o None - device=none
758 758
759 759
760 This causes the device to disappear. 760 This causes the device to disappear.
@@ -770,7 +770,7 @@
770 770
771 771
772 772
773 will cause serial line 3 to accept input on the host's /dev/tty3 and 773 will cause serial line 3 to accept input on the host's /dev/tty2 and
774 display output on an xterm. That's a silly example - the most common 774 display output on an xterm. That's a silly example - the most common
775 use of this syntax is to reattach the main console to stdin and stdout 775 use of this syntax is to reattach the main console to stdin and stdout
776 as shown above. 776 as shown above.
@@ -785,7 +785,7 @@
785 785
786 786
787 787
788 55..33.. EExxaammpplleess 788 5.3. Examples
789 789
790 There are a number of interesting things you can do with this 790 There are a number of interesting things you can do with this
791 capability. 791 capability.
@@ -838,7 +838,7 @@
838 prompt of the other virtual machine. 838 prompt of the other virtual machine.
839 839
840 840
841 66.. SSeettttiinngg uupp tthhee nneettwwoorrkk 841 6. Setting up the network
842 842
843 843
844 844
@@ -858,19 +858,19 @@
858 There are currently five transport types available for a UML virtual 858 There are currently five transport types available for a UML virtual
859 machine to exchange packets with other hosts: 859 machine to exchange packets with other hosts:
860 860
861 +o ethertap 861 o ethertap
862 862
863 +o TUN/TAP 863 o TUN/TAP
864 864
865 +o Multicast 865 o Multicast
866 866
867 +o a switch daemon 867 o a switch daemon
868 868
869 +o slip 869 o slip
870 870
871 +o slirp 871 o slirp
872 872
873 +o pcap 873 o pcap
874 874
875 The TUN/TAP, ethertap, slip, and slirp transports allow a UML 875 The TUN/TAP, ethertap, slip, and slirp transports allow a UML
876 instance to exchange packets with the host. They may be directed 876 instance to exchange packets with the host. They may be directed
@@ -893,28 +893,28 @@
893 With so many host transports, which one should you use? Here's when 893 With so many host transports, which one should you use? Here's when
894 you should use each one: 894 you should use each one:
895 895
896 +o ethertap - if you want access to the host networking and it is 896 o ethertap - if you want access to the host networking and it is
897 running 2.2 897 running 2.2
898 898
899 +o TUN/TAP - if you want access to the host networking and it is 899 o TUN/TAP - if you want access to the host networking and it is
900 running 2.4. Also, the TUN/TAP transport is able to use a 900 running 2.4. Also, the TUN/TAP transport is able to use a
901 preconfigured device, allowing it to avoid using the setuid uml_net 901 preconfigured device, allowing it to avoid using the setuid uml_net
902 helper, which is a security advantage. 902 helper, which is a security advantage.
903 903
904 +o Multicast - if you want a purely virtual network and you don't want 904 o Multicast - if you want a purely virtual network and you don't want
905 to set up anything but the UML 905 to set up anything but the UML
906 906
907 +o a switch daemon - if you want a purely virtual network and you 907 o a switch daemon - if you want a purely virtual network and you
908 don't mind running the daemon in order to get somewhat better 908 don't mind running the daemon in order to get somewhat better
909 performance 909 performance
910 910
911 +o slip - there is no particular reason to run the slip backend unless 911 o slip - there is no particular reason to run the slip backend unless
912 ethertap and TUN/TAP are just not available for some reason 912 ethertap and TUN/TAP are just not available for some reason
913 913
914 +o slirp - if you don't have root access on the host to setup 914 o slirp - if you don't have root access on the host to setup
915 networking, or if you don't want to allocate an IP to your UML 915 networking, or if you don't want to allocate an IP to your UML
916 916
917 +o pcap - not much use for actual network connectivity, but great for 917 o pcap - not much use for actual network connectivity, but great for
918 monitoring traffic on the host 918 monitoring traffic on the host
919 919
920 Ethertap is available on 2.4 and works fine. TUN/TAP is preferred 920 Ethertap is available on 2.4 and works fine. TUN/TAP is preferred
@@ -926,7 +926,7 @@
926 exploit the helper's root privileges. 926 exploit the helper's root privileges.
927 927
928 928
929 66..11.. GGeenneerraall sseettuupp 929 6.1. General setup
930 930
931 First, you must have the virtual network enabled in your UML. If are 931 First, you must have the virtual network enabled in your UML. If are
932 running a prebuilt kernel from this site, everything is already 932 running a prebuilt kernel from this site, everything is already
@@ -995,7 +995,7 @@
995 995
996 996
997 997
998 66..22.. UUsseerrssppaaccee ddaaeemmoonnss 998 6.2. Userspace daemons
999 999
1000 You will likely need the setuid helper, or the switch daemon, or both. 1000 You will likely need the setuid helper, or the switch daemon, or both.
1001 They are both installed with the RPM and deb, so if you've installed 1001 They are both installed with the RPM and deb, so if you've installed
@@ -1011,7 +1011,7 @@
1011 1011
1012 1012
1013 1013
1014 66..33.. SSppeecciiffyyiinngg eetthheerrnneett aaddddrreesssseess 1014 6.3. Specifying ethernet addresses
1015 1015
1016 Below, you will see that the TUN/TAP, ethertap, and daemon interfaces 1016 Below, you will see that the TUN/TAP, ethertap, and daemon interfaces
1017 allow you to specify hardware addresses for the virtual ethernet 1017 allow you to specify hardware addresses for the virtual ethernet
@@ -1023,11 +1023,11 @@
1023 sufficient to guarantee a unique hardware address for the device. A 1023 sufficient to guarantee a unique hardware address for the device. A
1024 couple of exceptions are: 1024 couple of exceptions are:
1025 1025
1026 +o Another set of virtual ethernet devices are on the same network and 1026 o Another set of virtual ethernet devices are on the same network and
1027 they are assigned hardware addresses using a different scheme which 1027 they are assigned hardware addresses using a different scheme which
1028 may conflict with the UML IP address-based scheme 1028 may conflict with the UML IP address-based scheme
1029 1029
1030 +o You aren't going to use the device for IP networking, so you don't 1030 o You aren't going to use the device for IP networking, so you don't
1031 assign the device an IP address 1031 assign the device an IP address
1032 1032
1033 If you let the driver provide the hardware address, you should make 1033 If you let the driver provide the hardware address, you should make
@@ -1049,7 +1049,7 @@
1049 1049
1050 1050
1051 1051
1052 66..44.. UUMMLL iinntteerrffaaccee sseettuupp 1052 6.4. UML interface setup
1053 1053
1054 Once the network devices have been described on the command line, you 1054 Once the network devices have been described on the command line, you
1055 should boot UML and log in. 1055 should boot UML and log in.
@@ -1131,7 +1131,7 @@
1131 1131
1132 1132
1133 1133
1134 66..55.. MMuullttiiccaasstt 1134 6.5. Multicast
1135 1135
1136 The simplest way to set up a virtual network between multiple UMLs is 1136 The simplest way to set up a virtual network between multiple UMLs is
1137 to use the mcast transport. This was written by Harald Welte and is 1137 to use the mcast transport. This was written by Harald Welte and is
@@ -1194,7 +1194,7 @@
1194 1194
1195 1195
1196 1196
1197 66..66.. TTUUNN//TTAAPP wwiitthh tthhee uummll__nneett hheellppeerr 1197 6.6. TUN/TAP with the uml_net helper
1198 1198
1199 TUN/TAP is the preferred mechanism on 2.4 to exchange packets with the 1199 TUN/TAP is the preferred mechanism on 2.4 to exchange packets with the
1200 host. The TUN/TAP backend has been in UML since 2.4.9-3um. 1200 host. The TUN/TAP backend has been in UML since 2.4.9-3um.
@@ -1247,10 +1247,10 @@
1247 There are a couple potential problems with running the TUN/TAP 1247 There are a couple potential problems with running the TUN/TAP
1248 transport on a 2.4 host kernel 1248 transport on a 2.4 host kernel
1249 1249
1250 +o TUN/TAP seems not to work on 2.4.3 and earlier. Upgrade the host 1250 o TUN/TAP seems not to work on 2.4.3 and earlier. Upgrade the host
1251 kernel or use the ethertap transport. 1251 kernel or use the ethertap transport.
1252 1252
1253 +o With an upgraded kernel, TUN/TAP may fail with 1253 o With an upgraded kernel, TUN/TAP may fail with
1254 1254
1255 1255
1256 File descriptor in bad state 1256 File descriptor in bad state
@@ -1269,7 +1269,7 @@
1269 1269
1270 1270
1271 1271
1272 66..77.. TTUUNN//TTAAPP wwiitthh aa pprreeccoonnffiigguurreedd ttaapp ddeevviiccee 1272 6.7. TUN/TAP with a preconfigured tap device
1273 1273
1274 If you prefer not to have UML use uml_net (which is somewhat 1274 If you prefer not to have UML use uml_net (which is somewhat
1275 insecure), with UML 2.4.17-11, you can set up a TUN/TAP device 1275 insecure), with UML 2.4.17-11, you can set up a TUN/TAP device
@@ -1277,7 +1277,7 @@
1277 there is no need for root assistance. Setting up the device is done 1277 there is no need for root assistance. Setting up the device is done
1278 as follows: 1278 as follows:
1279 1279
1280 +o Create the device with tunctl (available from the UML utilities 1280 o Create the device with tunctl (available from the UML utilities
1281 tarball) 1281 tarball)
1282 1282
1283 1283
@@ -1291,7 +1291,7 @@
1291 where uid is the user id or username that UML will be run as. This 1291 where uid is the user id or username that UML will be run as. This
1292 will tell you what device was created. 1292 will tell you what device was created.
1293 1293
1294 +o Configure the device IP (change IP addresses and device name to 1294 o Configure the device IP (change IP addresses and device name to
1295 suit) 1295 suit)
1296 1296
1297 1297
@@ -1303,7 +1303,7 @@
1303 1303
1304 1304
1305 1305
1306 +o Set up routing and arping if desired - this is my recipe, there are 1306 o Set up routing and arping if desired - this is my recipe, there are
1307 other ways of doing the same thing 1307 other ways of doing the same thing
1308 1308
1309 1309
@@ -1338,7 +1338,7 @@
1338 utility which reads the information from a config file and sets up 1338 utility which reads the information from a config file and sets up
1339 devices at boot time. 1339 devices at boot time.
1340 1340
1341 +o Rather than using up two IPs and ARPing for one of them, you can 1341 o Rather than using up two IPs and ARPing for one of them, you can
1342 also provide direct access to your LAN by the UML by using a 1342 also provide direct access to your LAN by the UML by using a
1343 bridge. 1343 bridge.
1344 1344
@@ -1417,7 +1417,7 @@
1417 Note that 'br0' should be setup using ifconfig with the existing IP 1417 Note that 'br0' should be setup using ifconfig with the existing IP
1418 address of eth0, as eth0 no longer has its own IP. 1418 address of eth0, as eth0 no longer has its own IP.
1419 1419
1420 +o 1420 o
1421 1421
1422 1422
1423 Also, the /dev/net/tun device must be writable by the user running 1423 Also, the /dev/net/tun device must be writable by the user running
@@ -1438,11 +1438,11 @@
1438 devices and chgrp /dev/net/tun to that group with mode 664 or 660. 1438 devices and chgrp /dev/net/tun to that group with mode 664 or 660.
1439 1439
1440 1440
1441 +o Once the device is set up, run UML with 'eth0=tuntap,device name' 1441 o Once the device is set up, run UML with 'eth0=tuntap,device name'
1442 (i.e. 'eth0=tuntap,tap0') on the command line (or do it with the 1442 (i.e. 'eth0=tuntap,tap0') on the command line (or do it with the
1443 mconsole config command). 1443 mconsole config command).
1444 1444
1445 +o Bring the eth device up in UML and you're in business. 1445 o Bring the eth device up in UML and you're in business.
1446 1446
1447 If you don't want that tap device any more, you can make it non- 1447 If you don't want that tap device any more, you can make it non-
1448 persistent with 1448 persistent with
@@ -1465,7 +1465,7 @@
1465 1465
1466 1466
1467 1467
1468 66..88.. EEtthheerrttaapp 1468 6.8. Ethertap
1469 1469
1470 Ethertap is the general mechanism on 2.2 for userspace processes to 1470 Ethertap is the general mechanism on 2.2 for userspace processes to
1471 exchange packets with the kernel. 1471 exchange packets with the kernel.
@@ -1561,9 +1561,9 @@
1561 1561
1562 1562
1563 1563
1564 66..99.. TThhee sswwiittcchh ddaaeemmoonn 1564 6.9. The switch daemon
1565 1565
1566 NNoottee: This is the daemon formerly known as uml_router, but which was 1566 Note: This is the daemon formerly known as uml_router, but which was
1567 renamed so the network weenies of the world would stop growling at me. 1567 renamed so the network weenies of the world would stop growling at me.
1568 1568
1569 1569
@@ -1649,7 +1649,7 @@
1649 1649
1650 1650
1651 1651
1652 66..1100.. SSlliipp 1652 6.10. Slip
1653 1653
1654 Slip is another, less general, mechanism for a process to communicate 1654 Slip is another, less general, mechanism for a process to communicate
1655 with the host networking. In contrast to the ethertap interface, 1655 with the host networking. In contrast to the ethertap interface,
@@ -1681,7 +1681,7 @@
1681 1681
1682 1682
1683 1683
1684 66..1111.. SSlliirrpp 1684 6.11. Slirp
1685 1685
1686 slirp uses an external program, usually /usr/bin/slirp, to provide IP 1686 slirp uses an external program, usually /usr/bin/slirp, to provide IP
1687 only networking connectivity through the host. This is similar to IP 1687 only networking connectivity through the host. This is similar to IP
@@ -1737,7 +1737,7 @@
1737 1737
1738 1738
1739 1739
1740 66..1122.. ppccaapp 1740 6.12. pcap
1741 1741
1742 The pcap transport is attached to a UML ethernet device on the command 1742 The pcap transport is attached to a UML ethernet device on the command
1743 line or with uml_mconsole with the following syntax: 1743 line or with uml_mconsole with the following syntax:
@@ -1777,7 +1777,7 @@
1777 1777
1778 1778
1779 1779
1780 66..1133.. SSeettttiinngg uupp tthhee hhoosstt yyoouurrsseellff 1780 6.13. Setting up the host yourself
1781 1781
1782 If you don't specify an address for the host side of the ethertap or 1782 If you don't specify an address for the host side of the ethertap or
1783 slip device, UML won't do any setup on the host. So this is what is 1783 slip device, UML won't do any setup on the host. So this is what is
@@ -1785,7 +1785,7 @@
1785 192.168.0.251 and a UML-side IP of 192.168.0.250 - adjust to suit your 1785 192.168.0.251 and a UML-side IP of 192.168.0.250 - adjust to suit your
1786 own network): 1786 own network):
1787 1787
1788 +o The device needs to be configured with its IP address. Tap devices 1788 o The device needs to be configured with its IP address. Tap devices
1789 are also configured with an mtu of 1484. Slip devices are 1789 are also configured with an mtu of 1484. Slip devices are
1790 configured with a point-to-point address pointing at the UML ip 1790 configured with a point-to-point address pointing at the UML ip
1791 address. 1791 address.
@@ -1805,7 +1805,7 @@
1805 1805
1806 1806
1807 1807
1808 +o If a tap device is being set up, a route is set to the UML IP. 1808 o If a tap device is being set up, a route is set to the UML IP.
1809 1809
1810 1810
1811 UML# route add -host 192.168.0.250 gw 192.168.0.251 1811 UML# route add -host 192.168.0.250 gw 192.168.0.251
@@ -1814,7 +1814,7 @@
1814 1814
1815 1815
1816 1816
1817 +o To allow other hosts on your network to see the virtual machine, 1817 o To allow other hosts on your network to see the virtual machine,
1818 proxy arp is set up for it. 1818 proxy arp is set up for it.
1819 1819
1820 1820
@@ -1824,7 +1824,7 @@
1824 1824
1825 1825
1826 1826
1827 +o Finally, the host is set up to route packets. 1827 o Finally, the host is set up to route packets.
1828 1828
1829 1829
1830 host# echo 1 > /proc/sys/net/ipv4/ip_forward 1830 host# echo 1 > /proc/sys/net/ipv4/ip_forward
@@ -1838,12 +1838,12 @@
1838 1838
1839 1839
1840 1840
1841 77.. SShhaarriinngg FFiilleessyysstteemmss bbeettwweeeenn VViirrttuuaall MMaacchhiinneess 1841 7. Sharing Filesystems between Virtual Machines
1842 1842
1843 1843
1844 1844
1845 1845
1846 77..11.. AA wwaarrnniinngg 1846 7.1. A warning
1847 1847
1848 Don't attempt to share filesystems simply by booting two UMLs from the 1848 Don't attempt to share filesystems simply by booting two UMLs from the
1849 same file. That's the same thing as booting two physical machines 1849 same file. That's the same thing as booting two physical machines
@@ -1851,7 +1851,7 @@
1851 1851
1852 1852
1853 1853
1854 77..22.. UUssiinngg llaayyeerreedd bblloocckk ddeevviicceess 1854 7.2. Using layered block devices
1855 1855
1856 The way to share a filesystem between two virtual machines is to use 1856 The way to share a filesystem between two virtual machines is to use
1857 the copy-on-write (COW) layering capability of the ubd block driver. 1857 the copy-on-write (COW) layering capability of the ubd block driver.
@@ -1896,7 +1896,7 @@
1896 1896
1897 1897
1898 1898
1899 77..33.. NNoottee!! 1899 7.3. Note!
1900 1900
1901 When checking the size of the COW file in order to see the gobs of 1901 When checking the size of the COW file in order to see the gobs of
1902 space that you're saving, make sure you use 'ls -ls' to see the actual 1902 space that you're saving, make sure you use 'ls -ls' to see the actual
@@ -1926,7 +1926,7 @@
1926 1926
1927 1927
1928 1928
1929 77..44.. AAnnootthheerr wwaarrnniinngg 1929 7.4. Another warning
1930 1930
1931 Once a filesystem is being used as a readonly backing file for a COW 1931 Once a filesystem is being used as a readonly backing file for a COW
1932 file, do not boot directly from it or modify it in any way. Doing so 1932 file, do not boot directly from it or modify it in any way. Doing so
@@ -1952,7 +1952,7 @@
1952 1952
1953 1953
1954 1954
1955 77..55.. uummll__mmoooo :: MMeerrggiinngg aa CCOOWW ffiillee wwiitthh iittss bbaacckkiinngg ffiillee 1955 7.5. uml_moo : Merging a COW file with its backing file
1956 1956
1957 Depending on how you use UML and COW devices, it may be advisable to 1957 Depending on how you use UML and COW devices, it may be advisable to
1958 merge the changes in the COW file into the backing file every once in 1958 merge the changes in the COW file into the backing file every once in
@@ -2001,7 +2001,7 @@
2001 2001
2002 2002
2003 2003
2004 88.. CCrreeaattiinngg ffiilleessyysstteemmss 2004 8. Creating filesystems
2005 2005
2006 2006
2007 You may want to create and mount new UML filesystems, either because 2007 You may want to create and mount new UML filesystems, either because
@@ -2015,7 +2015,7 @@
2015 should be easy to translate to the filesystem of your choice. 2015 should be easy to translate to the filesystem of your choice.
2016 2016
2017 2017
2018 88..11.. CCrreeaattee tthhee ffiilleessyysstteemm ffiillee 2018 8.1. Create the filesystem file
2019 2019
2020 dd is your friend. All you need to do is tell dd to create an empty 2020 dd is your friend. All you need to do is tell dd to create an empty
2021 file of the appropriate size. I usually make it sparse to save time 2021 file of the appropriate size. I usually make it sparse to save time
@@ -2032,7 +2032,7 @@
2032 2032
2033 2033
2034 2034
2035 88..22.. AAssssiiggnn tthhee ffiillee ttoo aa UUMMLL ddeevviiccee 2035 8.2. Assign the file to a UML device
2036 2036
2037 Add an argument like the following to the UML command line: 2037 Add an argument like the following to the UML command line:
2038 2038
@@ -2045,7 +2045,7 @@
2045 2045
2046 2046
2047 2047
2048 88..33.. CCrreeaattiinngg aanndd mmoouunnttiinngg tthhee ffiilleessyysstteemm 2048 8.3. Creating and mounting the filesystem
2049 2049
2050 Make sure that the filesystem is available, either by being built into 2050 Make sure that the filesystem is available, either by being built into
2051 the kernel, or available as a module, then boot up UML and log in. If 2051 the kernel, or available as a module, then boot up UML and log in. If
@@ -2096,7 +2096,7 @@
2096 2096
2097 2097
2098 2098
2099 99.. HHoosstt ffiillee aacccceessss 2099 9. Host file access
2100 2100
2101 2101
2102 If you want to access files on the host machine from inside UML, you 2102 If you want to access files on the host machine from inside UML, you
@@ -2112,7 +2112,7 @@
2112 files contained in it just as you would on the host. 2112 files contained in it just as you would on the host.
2113 2113
2114 2114
2115 99..11.. UUssiinngg hhoossttffss 2115 9.1. Using hostfs
2116 2116
2117 To begin with, make sure that hostfs is available inside the virtual 2117 To begin with, make sure that hostfs is available inside the virtual
2118 machine with 2118 machine with
@@ -2151,7 +2151,7 @@
2151 2151
2152 2152
2153 2153
2154 99..22.. hhoossttffss aass tthhee rroooott ffiilleessyysstteemm 2154 9.2. hostfs as the root filesystem
2155 2155
2156 It's possible to boot from a directory hierarchy on the host using 2156 It's possible to boot from a directory hierarchy on the host using
2157 hostfs rather than using the standard filesystem in a file. 2157 hostfs rather than using the standard filesystem in a file.
@@ -2194,20 +2194,20 @@
2194 UML should then boot as it does normally. 2194 UML should then boot as it does normally.
2195 2195
2196 2196
2197 99..33.. BBuuiillddiinngg hhoossttffss 2197 9.3. Building hostfs
2198 2198
2199 If you need to build hostfs because it's not in your kernel, you have 2199 If you need to build hostfs because it's not in your kernel, you have
2200 two choices: 2200 two choices:
2201 2201
2202 2202
2203 2203
2204 +o Compiling hostfs into the kernel: 2204 o Compiling hostfs into the kernel:
2205 2205
2206 2206
2207 Reconfigure the kernel and set the 'Host filesystem' option under 2207 Reconfigure the kernel and set the 'Host filesystem' option under
2208 2208
2209 2209
2210 +o Compiling hostfs as a module: 2210 o Compiling hostfs as a module:
2211 2211
2212 2212
2213 Reconfigure the kernel and set the 'Host filesystem' option under 2213 Reconfigure the kernel and set the 'Host filesystem' option under
@@ -2228,7 +2228,7 @@
2228 2228
2229 2229
2230 2230
2231 1100.. TThhee MMaannaaggeemmeenntt CCoonnssoollee 2231 10. The Management Console
2232 2232
2233 2233
2234 2234
@@ -2240,15 +2240,15 @@
2240 2240
2241 There are a number of things you can do with the mconsole interface: 2241 There are a number of things you can do with the mconsole interface:
2242 2242
2243 +o get the kernel version 2243 o get the kernel version
2244 2244
2245 +o add and remove devices 2245 o add and remove devices
2246 2246
2247 +o halt or reboot the machine 2247 o halt or reboot the machine
2248 2248
2249 +o Send SysRq commands 2249 o Send SysRq commands
2250 2250
2251 +o Pause and resume the UML 2251 o Pause and resume the UML
2252 2252
2253 2253
2254 You need the mconsole client (uml_mconsole) which is present in CVS 2254 You need the mconsole client (uml_mconsole) which is present in CVS
@@ -2300,28 +2300,28 @@
2300 2300
2301 You'll get a prompt, at which you can run one of these commands: 2301 You'll get a prompt, at which you can run one of these commands:
2302 2302
2303 +o version 2303 o version
2304 2304
2305 +o halt 2305 o halt
2306 2306
2307 +o reboot 2307 o reboot
2308 2308
2309 +o config 2309 o config
2310 2310
2311 +o remove 2311 o remove
2312 2312
2313 +o sysrq 2313 o sysrq
2314 2314
2315 +o help 2315 o help
2316 2316
2317 +o cad 2317 o cad
2318 2318
2319 +o stop 2319 o stop
2320 2320
2321 +o go 2321 o go
2322 2322
2323 2323
2324 1100..11.. vveerrssiioonn 2324 10.1. version
2325 2325
2326 This takes no arguments. It prints the UML version. 2326 This takes no arguments. It prints the UML version.
2327 2327
@@ -2342,7 +2342,7 @@
2342 2342
2343 2343
2344 2344
2345 1100..22.. hhaalltt aanndd rreebboooott 2345 10.2. halt and reboot
2346 2346
2347 These take no arguments. They shut the machine down immediately, with 2347 These take no arguments. They shut the machine down immediately, with
2348 no syncing of disks and no clean shutdown of userspace. So, they are 2348 no syncing of disks and no clean shutdown of userspace. So, they are
@@ -2357,7 +2357,7 @@
2357 2357
2358 2358
2359 2359
2360 1100..33.. ccoonnffiigg 2360 10.3. config
2361 2361
2362 "config" adds a new device to the virtual machine. Currently the ubd 2362 "config" adds a new device to the virtual machine. Currently the ubd
2363 and network drivers support this. It takes one argument, which is the 2363 and network drivers support this. It takes one argument, which is the
@@ -2378,7 +2378,7 @@
2378 2378
2379 2379
2380 2380
2381 1100..44.. rreemmoovvee 2381 10.4. remove
2382 2382
2383 "remove" deletes a device from the system. Its argument is just the 2383 "remove" deletes a device from the system. Its argument is just the
2384 name of the device to be removed. The device must be idle in whatever 2384 name of the device to be removed. The device must be idle in whatever
@@ -2397,7 +2397,7 @@
2397 2397
2398 2398
2399 2399
2400 1100..55.. ssyyssrrqq 2400 10.5. sysrq
2401 2401
2402 This takes one argument, which is a single letter. It calls the 2402 This takes one argument, which is a single letter. It calls the
2403 generic kernel's SysRq driver, which does whatever is called for by 2403 generic kernel's SysRq driver, which does whatever is called for by
@@ -2407,14 +2407,14 @@
2407 2407
2408 2408
2409 2409
2410 1100..66.. hheellpp 2410 10.6. help
2411 2411
2412 "help" returns a string listing the valid commands and what each one 2412 "help" returns a string listing the valid commands and what each one
2413 does. 2413 does.
2414 2414
2415 2415
2416 2416
2417 1100..77.. ccaadd 2417 10.7. cad
2418 2418
2419 This invokes the Ctl-Alt-Del action on init. What exactly this ends 2419 This invokes the Ctl-Alt-Del action on init. What exactly this ends
2420 up doing is up to /etc/inittab. Normally, it reboots the machine. 2420 up doing is up to /etc/inittab. Normally, it reboots the machine.
@@ -2432,7 +2432,7 @@
2432 2432
2433 2433
2434 2434
2435 1100..88.. ssttoopp 2435 10.8. stop
2436 2436
2437 This puts the UML in a loop reading mconsole requests until a 'go' 2437 This puts the UML in a loop reading mconsole requests until a 'go'
2438 mconsole command is received. This is very useful for making backups 2438 mconsole command is received. This is very useful for making backups
@@ -2448,7 +2448,7 @@
2448 2448
2449 2449
2450 2450
2451 1100..99.. ggoo 2451 10.9. go
2452 2452
2453 This resumes a UML after being paused by a 'stop' command. Note that 2453 This resumes a UML after being paused by a 'stop' command. Note that
2454 when the UML has resumed, TCP connections may have timed out and if 2454 when the UML has resumed, TCP connections may have timed out and if
@@ -2462,10 +2462,10 @@
2462 2462
2463 2463
2464 2464
2465 1111.. KKeerrnneell ddeebbuuggggiinngg 2465 11. Kernel debugging
2466 2466
2467 2467
2468 NNoottee:: The interface that makes debugging, as described here, possible 2468 Note: The interface that makes debugging, as described here, possible
2469 is present in 2.4.0-test6 kernels and later. 2469 is present in 2.4.0-test6 kernels and later.
2470 2470
2471 2471
@@ -2485,7 +2485,7 @@
2485 2485
2486 2486
2487 2487
2488 1111..11.. SSttaarrttiinngg tthhee kkeerrnneell uunnddeerr ggddbb 2488 11.1. Starting the kernel under gdb
2489 2489
2490 You can have the kernel running under the control of gdb from the 2490 You can have the kernel running under the control of gdb from the
2491 beginning by putting 'debug' on the command line. You will get an 2491 beginning by putting 'debug' on the command line. You will get an
@@ -2498,7 +2498,7 @@
2498 There is a transcript of a debugging session here <debug- 2498 There is a transcript of a debugging session here <debug-
2499 session.html> , with breakpoints being set in the scheduler and in an 2499 session.html> , with breakpoints being set in the scheduler and in an
2500 interrupt handler. 2500 interrupt handler.
2501 1111..22.. EExxaammiinniinngg sslleeeeppiinngg pprroocceesssseess 2501 11.2. Examining sleeping processes
2502 2502
2503 Not every bug is evident in the currently running process. Sometimes, 2503 Not every bug is evident in the currently running process. Sometimes,
2504 processes hang in the kernel when they shouldn't because they've 2504 processes hang in the kernel when they shouldn't because they've
@@ -2516,7 +2516,7 @@
2516 2516
2517 Now what you do is this: 2517 Now what you do is this:
2518 2518
2519 +o detach from the current thread 2519 o detach from the current thread
2520 2520
2521 2521
2522 (UML gdb) det 2522 (UML gdb) det
@@ -2525,7 +2525,7 @@
2525 2525
2526 2526
2527 2527
2528 +o attach to the thread you are interested in 2528 o attach to the thread you are interested in
2529 2529
2530 2530
2531 (UML gdb) att <host pid> 2531 (UML gdb) att <host pid>
@@ -2534,7 +2534,7 @@
2534 2534
2535 2535
2536 2536
2537 +o look at its stack and anything else of interest 2537 o look at its stack and anything else of interest
2538 2538
2539 2539
2540 (UML gdb) bt 2540 (UML gdb) bt
@@ -2545,7 +2545,7 @@
2545 Note that you can't do anything at this point that requires that a 2545 Note that you can't do anything at this point that requires that a
2546 process execute, e.g. calling a function 2546 process execute, e.g. calling a function
2547 2547
2548 +o when you're done looking at that process, reattach to the current 2548 o when you're done looking at that process, reattach to the current
2549 thread and continue it 2549 thread and continue it
2550 2550
2551 2551
@@ -2569,12 +2569,12 @@
2569 2569
2570 2570
2571 2571
2572 1111..33.. RRuunnnniinngg dddddd oonn UUMMLL 2572 11.3. Running ddd on UML
2573 2573
2574 ddd works on UML, but requires a special kludge. The process goes 2574 ddd works on UML, but requires a special kludge. The process goes
2575 like this: 2575 like this:
2576 2576
2577 +o Start ddd 2577 o Start ddd
2578 2578
2579 2579
2580 host% ddd linux 2580 host% ddd linux
@@ -2583,14 +2583,14 @@
2583 2583
2584 2584
2585 2585
2586 +o With ps, get the pid of the gdb that ddd started. You can ask the 2586 o With ps, get the pid of the gdb that ddd started. You can ask the
2587 gdb to tell you, but for some reason that confuses things and 2587 gdb to tell you, but for some reason that confuses things and
2588 causes a hang. 2588 causes a hang.
2589 2589
2590 +o run UML with 'debug=parent gdb-pid=<pid>' added to the command line 2590 o run UML with 'debug=parent gdb-pid=<pid>' added to the command line
2591 - it will just sit there after you hit return 2591 - it will just sit there after you hit return
2592 2592
2593 +o type 'att 1' to the ddd gdb and you will see something like 2593 o type 'att 1' to the ddd gdb and you will see something like
2594 2594
2595 2595
2596 0xa013dc51 in __kill () 2596 0xa013dc51 in __kill ()
@@ -2602,12 +2602,12 @@
2602 2602
2603 2603
2604 2604
2605 +o At this point, type 'c', UML will boot up, and you can use ddd just 2605 o At this point, type 'c', UML will boot up, and you can use ddd just
2606 as you do on any other process. 2606 as you do on any other process.
2607 2607
2608 2608
2609 2609
2610 1111..44.. DDeebbuuggggiinngg mmoodduulleess 2610 11.4. Debugging modules
2611 2611
2612 gdb has support for debugging code which is dynamically loaded into 2612 gdb has support for debugging code which is dynamically loaded into
2613 the process. This support is what is needed to debug kernel modules 2613 the process. This support is what is needed to debug kernel modules
@@ -2823,7 +2823,7 @@
2823 2823
2824 2824
2825 2825
2826 1111..55.. AAttttaacchhiinngg ggddbb ttoo tthhee kkeerrnneell 2826 11.5. Attaching gdb to the kernel
2827 2827
2828 If you don't have the kernel running under gdb, you can attach gdb to 2828 If you don't have the kernel running under gdb, you can attach gdb to
2829 it later by sending the tracing thread a SIGUSR1. The first line of 2829 it later by sending the tracing thread a SIGUSR1. The first line of
@@ -2857,7 +2857,7 @@
2857 2857
2858 2858
2859 2859
2860 1111..66.. UUssiinngg aalltteerrnnaattee ddeebbuuggggeerrss 2860 11.6. Using alternate debuggers
2861 2861
2862 UML has support for attaching to an already running debugger rather 2862 UML has support for attaching to an already running debugger rather
2863 than starting gdb itself. This is present in CVS as of 17 Apr 2001. 2863 than starting gdb itself. This is present in CVS as of 17 Apr 2001.
@@ -2886,7 +2886,7 @@
2886 An example of an alternate debugger is strace. You can strace the 2886 An example of an alternate debugger is strace. You can strace the
2887 actual kernel as follows: 2887 actual kernel as follows:
2888 2888
2889 +o Run the following in a shell 2889 o Run the following in a shell
2890 2890
2891 2891
2892 host% 2892 host%
@@ -2894,10 +2894,10 @@
2894 2894
2895 2895
2896 2896
2897 +o Run UML with 'debug' and 'gdb-pid=<pid>' with the pid printed out 2897 o Run UML with 'debug' and 'gdb-pid=<pid>' with the pid printed out
2898 by the previous command 2898 by the previous command
2899 2899
2900 +o Hit return in the shell, and UML will start running, and strace 2900 o Hit return in the shell, and UML will start running, and strace
2901 output will start accumulating in the output file. 2901 output will start accumulating in the output file.
2902 2902
2903 Note that this is different from running 2903 Note that this is different from running
@@ -2917,9 +2917,9 @@
2917 2917
2918 2918
2919 2919
2920 1122.. KKeerrnneell ddeebbuuggggiinngg eexxaammpplleess 2920 12. Kernel debugging examples
2921 2921
2922 1122..11.. TThhee ccaassee ooff tthhee hhuunngg ffsscckk 2922 12.1. The case of the hung fsck
2923 2923
2924 When booting up the kernel, fsck failed, and dropped me into a shell 2924 When booting up the kernel, fsck failed, and dropped me into a shell
2925 to fix things up. I ran fsck -y, which hung: 2925 to fix things up. I ran fsck -y, which hung:
@@ -3154,9 +3154,9 @@
3154 3154
3155 The interesting things here are : 3155 The interesting things here are :
3156 3156
3157 +o There are two segfaults on this stack (frames 9 and 14) 3157 o There are two segfaults on this stack (frames 9 and 14)
3158 3158
3159 +o The first faulting address (frame 11) is 0x50000800 3159 o The first faulting address (frame 11) is 0x50000800
3160 3160
3161 (gdb) p (void *)1342179328 3161 (gdb) p (void *)1342179328
3162 $16 = (void *) 0x50000800 3162 $16 = (void *) 0x50000800
@@ -3399,7 +3399,7 @@
3399 on will be somewhat clearer. 3399 on will be somewhat clearer.
3400 3400
3401 3401
3402 1122..22.. EEppiissooddee 22:: TThhee ccaassee ooff tthhee hhuunngg ffsscckk 3402 12.2. Episode 2: The case of the hung fsck
3403 3403
3404 After setting a trap in the SEGV handler for accesses to the signal 3404 After setting a trap in the SEGV handler for accesses to the signal
3405 thread's stack, I reran the kernel. 3405 thread's stack, I reran the kernel.
@@ -3788,12 +3788,12 @@
3788 3788
3789 3789
3790 3790
3791 1133.. WWhhaatt ttoo ddoo wwhheenn UUMMLL ddooeessnn''tt wwoorrkk 3791 13. What to do when UML doesn't work
3792 3792
3793 3793
3794 3794
3795 3795
3796 1133..11.. SSttrraannggee ccoommppiillaattiioonn eerrrroorrss wwhheenn yyoouu bbuuiilldd ffrroomm ssoouurrccee 3796 13.1. Strange compilation errors when you build from source
3797 3797
3798 As of test11, it is necessary to have "ARCH=um" in the environment or 3798 As of test11, it is necessary to have "ARCH=um" in the environment or
3799 on the make command line for all steps in building UML, including 3799 on the make command line for all steps in building UML, including
@@ -3824,8 +3824,8 @@
3824 3824
3825 3825
3826 3826
3827 1133..33.. AA vvaarriieettyy ooff ppaanniiccss aanndd hhaannggss wwiitthh //ttmmpp oonn aa rreeiisseerrffss ffiilleessyyss-- 3827 13.3. A variety of panics and hangs with /tmp on a reiserfs filesys-
3828 tteemm 3828 tem
3829 3829
3830 I saw this on reiserfs 3.5.21 and it seems to be fixed in 3.5.27. 3830 I saw this on reiserfs 3.5.21 and it seems to be fixed in 3.5.27.
3831 Panics preceded by 3831 Panics preceded by
@@ -3842,8 +3842,8 @@
3842 3842
3843 3843
3844 3844
3845 1133..44.. TThhee ccoommppiillee ffaaiillss wwiitthh eerrrroorrss aabboouutt ccoonnfflliiccttiinngg ttyyppeess ffoorr 3845 13.4. The compile fails with errors about conflicting types for
3846 ''ooppeenn'',, ''dduupp'',, aanndd ''wwaaiittppiidd'' 3846 'open', 'dup', and 'waitpid'
3847 3847
3848 This happens when you build in /usr/src/linux. The UML build makes 3848 This happens when you build in /usr/src/linux. The UML build makes
3849 the include/asm link point to include/asm-um. /usr/include/asm points 3849 the include/asm link point to include/asm-um. /usr/include/asm points
@@ -3854,14 +3854,14 @@
3854 3854
3855 3855
3856 3856
3857 1133..55.. UUMMLL ddooeessnn''tt wwoorrkk wwhheenn //ttmmpp iiss aann NNFFSS ffiilleessyysstteemm 3857 13.5. UML doesn't work when /tmp is an NFS filesystem
3858 3858
3859 This seems to be a similar situation with the ReiserFS problem above. 3859 This seems to be a similar situation with the ReiserFS problem above.
3860 Some versions of NFS seems not to handle mmap correctly, which UML 3860 Some versions of NFS seems not to handle mmap correctly, which UML
3861 depends on. The workaround is have /tmp be a non-NFS directory. 3861 depends on. The workaround is have /tmp be a non-NFS directory.
3862 3862
3863 3863
3864 1133..66.. UUMMLL hhaannggss oonn bboooott wwhheenn ccoommppiilleedd wwiitthh ggpprrooff ssuuppppoorrtt 3864 13.6. UML hangs on boot when compiled with gprof support
3865 3865
3866 If you build UML with gprof support and, early in the boot, it does 3866 If you build UML with gprof support and, early in the boot, it does
3867 this 3867 this
@@ -3878,7 +3878,7 @@
3878 3878
3879 3879
3880 3880
3881 1133..77.. ssyyssllooggdd ddiieess wwiitthh aa SSIIGGTTEERRMM oonn ssttaarrttuupp 3881 13.7. syslogd dies with a SIGTERM on startup
3882 3882
3883 The exact boot error depends on the distribution that you're booting, 3883 The exact boot error depends on the distribution that you're booting,
3884 but Debian produces this: 3884 but Debian produces this:
@@ -3897,17 +3897,17 @@
3897 3897
3898 3898
3899 3899
3900 1133..88.. TTUUNN//TTAAPP nneettwwoorrkkiinngg ddooeessnn''tt wwoorrkk oonn aa 22..44 hhoosstt 3900 13.8. TUN/TAP networking doesn't work on a 2.4 host
3901 3901
3902 There are a couple of problems which were 3902 There are a couple of problems which were
3903 <http://www.geocrawler.com/lists/3/SourceForge/597/0/> name="pointed 3903 <http://www.geocrawler.com/lists/3/SourceForge/597/0/> name="pointed
3904 out"> by Tim Robinson <timro at trkr dot net> 3904 out"> by Tim Robinson <timro at trkr dot net>
3905 3905
3906 +o It doesn't work on hosts running 2.4.7 (or thereabouts) or earlier. 3906 o It doesn't work on hosts running 2.4.7 (or thereabouts) or earlier.
3907 The fix is to upgrade to something more recent and then read the 3907 The fix is to upgrade to something more recent and then read the
3908 next item. 3908 next item.
3909 3909
3910 +o If you see 3910 o If you see
3911 3911
3912 3912
3913 File descriptor in bad state 3913 File descriptor in bad state
@@ -3921,8 +3921,8 @@
3921 3921
3922 3922
3923 3923
3924 1133..99.. YYoouu ccaann nneettwwoorrkk ttoo tthhee hhoosstt bbuutt nnoott ttoo ootthheerr mmaacchhiinneess oonn tthhee 3924 13.9. You can network to the host but not to other machines on the
3925 nneett 3925 net
3926 3926
3927 If you can connect to the host, and the host can connect to UML, but 3927 If you can connect to the host, and the host can connect to UML, but
3928 you cannot connect to any other machines, then you may need to enable 3928 you cannot connect to any other machines, then you may need to enable
@@ -3972,7 +3972,7 @@
3972 3972
3973 3973
3974 3974
3975 1133..1100.. II hhaavvee nnoo rroooott aanndd II wwaanntt ttoo ssccrreeaamm 3975 13.10. I have no root and I want to scream
3976 3976
3977 Thanks to Birgit Wahlich for telling me about this strange one. It 3977 Thanks to Birgit Wahlich for telling me about this strange one. It
3978 turns out that there's a limit of six environment variables on the 3978 turns out that there's a limit of six environment variables on the
@@ -3987,7 +3987,7 @@
3987 3987
3988 3988
3989 3989
3990 1133..1111.. UUMMLL bbuuiilldd ccoonnfflliicctt bbeettwweeeenn ppttrraaccee..hh aanndd uuccoonntteexxtt..hh 3990 13.11. UML build conflict between ptrace.h and ucontext.h
3991 3991
3992 On some older systems, /usr/include/asm/ptrace.h and 3992 On some older systems, /usr/include/asm/ptrace.h and
3993 /usr/include/sys/ucontext.h define the same names. So, when they're 3993 /usr/include/sys/ucontext.h define the same names. So, when they're
@@ -4007,7 +4007,7 @@
4007 4007
4008 4008
4009 4009
4010 1133..1122.. TThhee UUMMLL BBooggooMMiippss iiss eexxaaccttllyy hhaallff tthhee hhoosstt''ss BBooggooMMiippss 4010 13.12. The UML BogoMips is exactly half the host's BogoMips
4011 4011
4012 On i386 kernels, there are two ways of running the loop that is used 4012 On i386 kernels, there are two ways of running the loop that is used
4013 to calculate the BogoMips rating, using the TSC if it's there or using 4013 to calculate the BogoMips rating, using the TSC if it's there or using
@@ -4019,7 +4019,7 @@
4019 4019
4020 4020
4021 4021
4022 1133..1133.. WWhheenn yyoouu rruunn UUMMLL,, iitt iimmmmeeddiiaatteellyy sseeggffaauullttss 4022 13.13. When you run UML, it immediately segfaults
4023 4023
4024 If the host is configured with the 2G/2G address space split, that's 4024 If the host is configured with the 2G/2G address space split, that's
4025 why. See ``UML on 2G/2G hosts'' for the details on getting UML to 4025 why. See ``UML on 2G/2G hosts'' for the details on getting UML to
@@ -4027,7 +4027,7 @@
4027 4027
4028 4028
4029 4029
4030 1133..1144.. xxtteerrmmss aappppeeaarr,, tthheenn iimmmmeeddiiaatteellyy ddiissaappppeeaarr 4030 13.14. xterms appear, then immediately disappear
4031 4031
4032 If you're running an up to date kernel with an old release of 4032 If you're running an up to date kernel with an old release of
4033 uml_utilities, the port-helper program will not work properly, so 4033 uml_utilities, the port-helper program will not work properly, so
@@ -4039,7 +4039,7 @@
4039 4039
4040 4040
4041 4041
4042 1133..1155.. AAnnyy ootthheerr ppaanniicc,, hhaanngg,, oorr ssttrraannggee bbeehhaavviioorr 4042 13.15. Any other panic, hang, or strange behavior
4043 4043
4044 If you're seeing truly strange behavior, such as hangs or panics that 4044 If you're seeing truly strange behavior, such as hangs or panics that
4045 happen in random places, or you try running the debugger to see what's 4045 happen in random places, or you try running the debugger to see what's
@@ -4059,7 +4059,7 @@
4059 4059
4060 If you want to be super-helpful, read ``Diagnosing Problems'' and 4060 If you want to be super-helpful, read ``Diagnosing Problems'' and
4061 follow the instructions contained therein. 4061 follow the instructions contained therein.
4062 1144.. DDiiaaggnnoossiinngg PPrroobblleemmss 4062 14. Diagnosing Problems
4063 4063
4064 4064
4065 If you get UML to crash, hang, or otherwise misbehave, you should 4065 If you get UML to crash, hang, or otherwise misbehave, you should
@@ -4078,7 +4078,7 @@
4078 ``Kernel debugging'' UML first. 4078 ``Kernel debugging'' UML first.
4079 4079
4080 4080
4081 1144..11.. CCaassee 11 :: NNoorrmmaall kkeerrnneell ppaanniiccss 4081 14.1. Case 1 : Normal kernel panics
4082 4082
4083 The most common case is for a normal thread to panic. To debug this, 4083 The most common case is for a normal thread to panic. To debug this,
4084 you will need to run it under the debugger (add 'debug' to the command 4084 you will need to run it under the debugger (add 'debug' to the command
@@ -4128,7 +4128,7 @@
4128 to get that information from the faulting ip. 4128 to get that information from the faulting ip.
4129 4129
4130 4130
4131 1144..22.. CCaassee 22 :: TTrraacciinngg tthhrreeaadd ppaanniiccss 4131 14.2. Case 2 : Tracing thread panics
4132 4132
4133 The less common and more painful case is when the tracing thread 4133 The less common and more painful case is when the tracing thread
4134 panics. In this case, the kernel debugger will be useless because it 4134 panics. In this case, the kernel debugger will be useless because it
@@ -4161,7 +4161,7 @@
4161 backtrace in and wait for our crack debugging team to fix the problem. 4161 backtrace in and wait for our crack debugging team to fix the problem.
4162 4162
4163 4163
4164 1144..33.. CCaassee 33 :: TTrraacciinngg tthhrreeaadd ppaanniiccss ccaauusseedd bbyy ootthheerr tthhrreeaaddss 4164 14.3. Case 3 : Tracing thread panics caused by other threads
4165 4165
4166 However, there are cases where the misbehavior of another thread 4166 However, there are cases where the misbehavior of another thread
4167 caused the problem. The most common panic of this type is: 4167 caused the problem. The most common panic of this type is:
@@ -4227,7 +4227,7 @@
4227 4227
4228 4228
4229 4229
4230 1144..44.. CCaassee 44 :: HHaannggss 4230 14.4. Case 4 : Hangs
4231 4231
4232 Hangs seem to be fairly rare, but they sometimes happen. When a hang 4232 Hangs seem to be fairly rare, but they sometimes happen. When a hang
4233 happens, we need a backtrace from the offending process. Run the 4233 happens, we need a backtrace from the offending process. Run the
@@ -4257,7 +4257,7 @@
4257 4257
4258 4258
4259 4259
4260 1155.. TThhaannkkss 4260 15. Thanks
4261 4261
4262 4262
4263 A number of people have helped this project in various ways, and this 4263 A number of people have helped this project in various ways, and this
@@ -4274,20 +4274,20 @@
4274 bookkeeping lapses and I forget about contributions. 4274 bookkeeping lapses and I forget about contributions.
4275 4275
4276 4276
4277 1155..11.. CCooddee aanndd DDooccuummeennttaattiioonn 4277 15.1. Code and Documentation
4278 4278
4279 Rusty Russell <rusty at linuxcare.com.au> - 4279 Rusty Russell <rusty at linuxcare.com.au> -
4280 4280
4281 +o wrote the HOWTO <http://user-mode- 4281 o wrote the HOWTO <http://user-mode-
4282 linux.sourceforge.net/UserModeLinux-HOWTO.html> 4282 linux.sourceforge.net/UserModeLinux-HOWTO.html>
4283 4283
4284 +o prodded me into making this project official and putting it on 4284 o prodded me into making this project official and putting it on
4285 SourceForge 4285 SourceForge
4286 4286
4287 +o came up with the way cool UML logo <http://user-mode- 4287 o came up with the way cool UML logo <http://user-mode-
4288 linux.sourceforge.net/uml-small.png> 4288 linux.sourceforge.net/uml-small.png>
4289 4289
4290 +o redid the config process 4290 o redid the config process
4291 4291
4292 4292
4293 Peter Moulder <reiter at netspace.net.au> - Fixed my config and build 4293 Peter Moulder <reiter at netspace.net.au> - Fixed my config and build
@@ -4296,18 +4296,18 @@
4296 4296
4297 Bill Stearns <wstearns at pobox.com> - 4297 Bill Stearns <wstearns at pobox.com> -
4298 4298
4299 +o HOWTO updates 4299 o HOWTO updates
4300 4300
4301 +o lots of bug reports 4301 o lots of bug reports
4302 4302
4303 +o lots of testing 4303 o lots of testing
4304 4304
4305 +o dedicated a box (uml.ists.dartmouth.edu) to support UML development 4305 o dedicated a box (uml.ists.dartmouth.edu) to support UML development
4306 4306
4307 +o wrote the mkrootfs script, which allows bootable filesystems of 4307 o wrote the mkrootfs script, which allows bootable filesystems of
4308 RPM-based distributions to be cranked out 4308 RPM-based distributions to be cranked out
4309 4309
4310 +o cranked out a large number of filesystems with said script 4310 o cranked out a large number of filesystems with said script
4311 4311
4312 4312
4313 Jim Leu <jleu at mindspring.com> - Wrote the virtual ethernet driver 4313 Jim Leu <jleu at mindspring.com> - Wrote the virtual ethernet driver
@@ -4375,176 +4375,176 @@
4375 4375
4376 David Coulson <http://davidcoulson.net> - 4376 David Coulson <http://davidcoulson.net> -
4377 4377
4378 +o Set up the usermodelinux.org <http://usermodelinux.org> site, 4378 o Set up the usermodelinux.org <http://usermodelinux.org> site,
4379 which is a great way of keeping the UML user community on top of 4379 which is a great way of keeping the UML user community on top of
4380 UML goings-on. 4380 UML goings-on.
4381 4381
4382 +o Site documentation and updates 4382 o Site documentation and updates
4383 4383
4384 +o Nifty little UML management daemon UMLd 4384 o Nifty little UML management daemon UMLd
4385 <http://uml.openconsultancy.com/umld/> 4385 <http://uml.openconsultancy.com/umld/>
4386 4386
4387 +o Lots of testing and bug reports 4387 o Lots of testing and bug reports
4388 4388
4389 4389
4390 4390
4391 4391
4392 1155..22.. FFlluusshhiinngg oouutt bbuuggss 4392 15.2. Flushing out bugs
4393 4393
4394 4394
4395 4395
4396 +o Yuri Pudgorodsky 4396 o Yuri Pudgorodsky
4397 4397
4398 +o Gerald Britton 4398 o Gerald Britton
4399 4399
4400 +o Ian Wehrman 4400 o Ian Wehrman
4401 4401
4402 +o Gord Lamb 4402 o Gord Lamb
4403 4403
4404 +o Eugene Koontz 4404 o Eugene Koontz
4405 4405
4406 +o John H. Hartman 4406 o John H. Hartman
4407 4407
4408 +o Anders Karlsson 4408 o Anders Karlsson
4409 4409
4410 +o Daniel Phillips 4410 o Daniel Phillips
4411 4411
4412 +o John Fremlin 4412 o John Fremlin
4413 4413
4414 +o Rainer Burgstaller 4414 o Rainer Burgstaller
4415 4415
4416 +o James Stevenson 4416 o James Stevenson
4417 4417
4418 +o Matt Clay 4418 o Matt Clay
4419 4419
4420 +o Cliff Jefferies 4420 o Cliff Jefferies
4421 4421
4422 +o Geoff Hoff 4422 o Geoff Hoff
4423 4423
4424 +o Lennert Buytenhek 4424 o Lennert Buytenhek
4425 4425
4426 +o Al Viro 4426 o Al Viro
4427 4427
4428 +o Frank Klingenhoefer 4428 o Frank Klingenhoefer
4429 4429
4430 +o Livio Baldini Soares 4430 o Livio Baldini Soares
4431 4431
4432 +o Jon Burgess 4432 o Jon Burgess
4433 4433
4434 +o Petru Paler 4434 o Petru Paler
4435 4435
4436 +o Paul 4436 o Paul
4437 4437
4438 +o Chris Reahard 4438 o Chris Reahard
4439 4439
4440 +o Sverker Nilsson 4440 o Sverker Nilsson
4441 4441
4442 +o Gong Su 4442 o Gong Su
4443 4443
4444 +o johan verrept 4444 o johan verrept
4445 4445
4446 +o Bjorn Eriksson 4446 o Bjorn Eriksson
4447 4447
4448 +o Lorenzo Allegrucci 4448 o Lorenzo Allegrucci
4449 4449
4450 +o Muli Ben-Yehuda 4450 o Muli Ben-Yehuda
4451 4451
4452 +o David Mansfield 4452 o David Mansfield
4453 4453
4454 +o Howard Goff 4454 o Howard Goff
4455 4455
4456 +o Mike Anderson 4456 o Mike Anderson
4457 4457
4458 +o John Byrne 4458 o John Byrne
4459 4459
4460 +o Sapan J. Batia 4460 o Sapan J. Batia
4461 4461
4462 +o Iris Huang 4462 o Iris Huang
4463 4463
4464 +o Jan Hudec 4464 o Jan Hudec
4465 4465
4466 +o Voluspa 4466 o Voluspa
4467 4467
4468 4468
4469 4469
4470 4470
4471 1155..33.. BBuugglleettss aanndd cclleeaann--uuppss 4471 15.3. Buglets and clean-ups
4472 4472
4473 4473
4474 4474
4475 +o Dave Zarzycki 4475 o Dave Zarzycki
4476 4476
4477 +o Adam Lazur 4477 o Adam Lazur
4478 4478
4479 +o Boria Feigin 4479 o Boria Feigin
4480 4480
4481 +o Brian J. Murrell 4481 o Brian J. Murrell
4482 4482
4483 +o JS 4483 o JS
4484 4484
4485 +o Roman Zippel 4485 o Roman Zippel
4486 4486
4487 +o Wil Cooley 4487 o Wil Cooley
4488 4488
4489 +o Ayelet Shemesh 4489 o Ayelet Shemesh
4490 4490
4491 +o Will Dyson 4491 o Will Dyson
4492 4492
4493 +o Sverker Nilsson 4493 o Sverker Nilsson
4494 4494
4495 +o dvorak 4495 o dvorak
4496 4496
4497 +o v.naga srinivas 4497 o v.naga srinivas
4498 4498
4499 +o Shlomi Fish 4499 o Shlomi Fish
4500 4500
4501 +o Roger Binns 4501 o Roger Binns
4502 4502
4503 +o johan verrept 4503 o johan verrept
4504 4504
4505 +o MrChuoi 4505 o MrChuoi
4506 4506
4507 +o Peter Cleve 4507 o Peter Cleve
4508 4508
4509 +o Vincent Guffens 4509 o Vincent Guffens
4510 4510
4511 +o Nathan Scott 4511 o Nathan Scott
4512 4512
4513 +o Patrick Caulfield 4513 o Patrick Caulfield
4514 4514
4515 +o jbearce 4515 o jbearce
4516 4516
4517 +o Catalin Marinas 4517 o Catalin Marinas
4518 4518
4519 +o Shane Spencer 4519 o Shane Spencer
4520 4520
4521 +o Zou Min 4521 o Zou Min
4522 4522
4523 4523
4524 +o Ryan Boder 4524 o Ryan Boder
4525 4525
4526 +o Lorenzo Colitti 4526 o Lorenzo Colitti
4527 4527
4528 +o Gwendal Grignou 4528 o Gwendal Grignou
4529 4529
4530 +o Andre' Breiler 4530 o Andre' Breiler
4531 4531
4532 +o Tsutomu Yasuda 4532 o Tsutomu Yasuda
4533 4533
4534 4534
4535 4535
4536 1155..44.. CCaassee SSttuuddiieess 4536 15.4. Case Studies
4537 4537
4538 4538
4539 +o Jon Wright 4539 o Jon Wright
4540 4540
4541 +o William McEwan 4541 o William McEwan
4542 4542
4543 +o Michael Richardson 4543 o Michael Richardson
4544 4544
4545 4545
4546 4546
4547 1155..55.. OOtthheerr ccoonnttrriibbuuttiioonnss 4547 15.5. Other contributions
4548 4548
4549 4549
4550 Bill Carr <Bill.Carr at compaq.com> made the Red Hat mkrootfs script 4550 Bill Carr <Bill.Carr at compaq.com> made the Red Hat mkrootfs script