diff options
Diffstat (limited to 'Documentation')
24 files changed, 484 insertions, 329 deletions
diff --git a/Documentation/DocBook/mtdnand.tmpl b/Documentation/DocBook/mtdnand.tmpl index f508a8a27fea..5e7d84b48505 100644 --- a/Documentation/DocBook/mtdnand.tmpl +++ b/Documentation/DocBook/mtdnand.tmpl | |||
@@ -174,7 +174,7 @@ | |||
174 | </para> | 174 | </para> |
175 | <programlisting> | 175 | <programlisting> |
176 | static struct mtd_info *board_mtd; | 176 | static struct mtd_info *board_mtd; |
177 | static unsigned long baseaddr; | 177 | static void __iomem *baseaddr; |
178 | </programlisting> | 178 | </programlisting> |
179 | <para> | 179 | <para> |
180 | Static example | 180 | Static example |
@@ -182,7 +182,7 @@ static unsigned long baseaddr; | |||
182 | <programlisting> | 182 | <programlisting> |
183 | static struct mtd_info board_mtd; | 183 | static struct mtd_info board_mtd; |
184 | static struct nand_chip board_chip; | 184 | static struct nand_chip board_chip; |
185 | static unsigned long baseaddr; | 185 | static void __iomem *baseaddr; |
186 | </programlisting> | 186 | </programlisting> |
187 | </sect1> | 187 | </sect1> |
188 | <sect1 id="Partition_defines"> | 188 | <sect1 id="Partition_defines"> |
@@ -283,8 +283,8 @@ int __init board_init (void) | |||
283 | } | 283 | } |
284 | 284 | ||
285 | /* map physical address */ | 285 | /* map physical address */ |
286 | baseaddr = (unsigned long)ioremap(CHIP_PHYSICAL_ADDRESS, 1024); | 286 | baseaddr = ioremap(CHIP_PHYSICAL_ADDRESS, 1024); |
287 | if(!baseaddr){ | 287 | if (!baseaddr) { |
288 | printk("Ioremap to access NAND chip failed\n"); | 288 | printk("Ioremap to access NAND chip failed\n"); |
289 | err = -EIO; | 289 | err = -EIO; |
290 | goto out_mtd; | 290 | goto out_mtd; |
@@ -316,7 +316,7 @@ int __init board_init (void) | |||
316 | goto out; | 316 | goto out; |
317 | 317 | ||
318 | out_ior: | 318 | out_ior: |
319 | iounmap((void *)baseaddr); | 319 | iounmap(baseaddr); |
320 | out_mtd: | 320 | out_mtd: |
321 | kfree (board_mtd); | 321 | kfree (board_mtd); |
322 | out: | 322 | out: |
@@ -341,7 +341,7 @@ static void __exit board_cleanup (void) | |||
341 | nand_release (board_mtd); | 341 | nand_release (board_mtd); |
342 | 342 | ||
343 | /* unmap physical address */ | 343 | /* unmap physical address */ |
344 | iounmap((void *)baseaddr); | 344 | iounmap(baseaddr); |
345 | 345 | ||
346 | /* Free the MTD device structure */ | 346 | /* Free the MTD device structure */ |
347 | kfree (board_mtd); | 347 | kfree (board_mtd); |
diff --git a/Documentation/IO-mapping.txt b/Documentation/IO-mapping.txt index 78a440695e11..1b5aa10df845 100644 --- a/Documentation/IO-mapping.txt +++ b/Documentation/IO-mapping.txt | |||
@@ -157,7 +157,7 @@ For such memory, you can do things like | |||
157 | * access only the 640k-1MB area, so anything else | 157 | * access only the 640k-1MB area, so anything else |
158 | * has to be remapped. | 158 | * has to be remapped. |
159 | */ | 159 | */ |
160 | char * baseptr = ioremap(0xFC000000, 1024*1024); | 160 | void __iomem *baseptr = ioremap(0xFC000000, 1024*1024); |
161 | 161 | ||
162 | /* write a 'A' to the offset 10 of the area */ | 162 | /* write a 'A' to the offset 10 of the area */ |
163 | writeb('A',baseptr+10); | 163 | writeb('A',baseptr+10); |
diff --git a/Documentation/DMA-mapping.txt b/Documentation/PCI/PCI-DMA-mapping.txt index ecad88d9fe59..ecad88d9fe59 100644 --- a/Documentation/DMA-mapping.txt +++ b/Documentation/PCI/PCI-DMA-mapping.txt | |||
diff --git a/Documentation/block/00-INDEX b/Documentation/block/00-INDEX index 961a0513f8c3..a406286f6f3e 100644 --- a/Documentation/block/00-INDEX +++ b/Documentation/block/00-INDEX | |||
@@ -1,7 +1,5 @@ | |||
1 | 00-INDEX | 1 | 00-INDEX |
2 | - This file | 2 | - This file |
3 | as-iosched.txt | ||
4 | - Anticipatory IO scheduler | ||
5 | barrier.txt | 3 | barrier.txt |
6 | - I/O Barriers | 4 | - I/O Barriers |
7 | biodoc.txt | 5 | biodoc.txt |
diff --git a/Documentation/block/as-iosched.txt b/Documentation/block/as-iosched.txt deleted file mode 100644 index 738b72be128e..000000000000 --- a/Documentation/block/as-iosched.txt +++ /dev/null | |||
@@ -1,172 +0,0 @@ | |||
1 | Anticipatory IO scheduler | ||
2 | ------------------------- | ||
3 | Nick Piggin <piggin@cyberone.com.au> 13 Sep 2003 | ||
4 | |||
5 | Attention! Database servers, especially those using "TCQ" disks should | ||
6 | investigate performance with the 'deadline' IO scheduler. Any system with high | ||
7 | disk performance requirements should do so, in fact. | ||
8 | |||
9 | If you see unusual performance characteristics of your disk systems, or you | ||
10 | see big performance regressions versus the deadline scheduler, please email | ||
11 | me. Database users don't bother unless you're willing to test a lot of patches | ||
12 | from me ;) its a known issue. | ||
13 | |||
14 | Also, users with hardware RAID controllers, doing striping, may find | ||
15 | highly variable performance results with using the as-iosched. The | ||
16 | as-iosched anticipatory implementation is based on the notion that a disk | ||
17 | device has only one physical seeking head. A striped RAID controller | ||
18 | actually has a head for each physical device in the logical RAID device. | ||
19 | |||
20 | However, setting the antic_expire (see tunable parameters below) produces | ||
21 | very similar behavior to the deadline IO scheduler. | ||
22 | |||
23 | Selecting IO schedulers | ||
24 | ----------------------- | ||
25 | Refer to Documentation/block/switching-sched.txt for information on | ||
26 | selecting an io scheduler on a per-device basis. | ||
27 | |||
28 | Anticipatory IO scheduler Policies | ||
29 | ---------------------------------- | ||
30 | The as-iosched implementation implements several layers of policies | ||
31 | to determine when an IO request is dispatched to the disk controller. | ||
32 | Here are the policies outlined, in order of application. | ||
33 | |||
34 | 1. one-way Elevator algorithm. | ||
35 | |||
36 | The elevator algorithm is similar to that used in deadline scheduler, with | ||
37 | the addition that it allows limited backward movement of the elevator | ||
38 | (i.e. seeks backwards). A seek backwards can occur when choosing between | ||
39 | two IO requests where one is behind the elevator's current position, and | ||
40 | the other is in front of the elevator's position. If the seek distance to | ||
41 | the request in back of the elevator is less than half the seek distance to | ||
42 | the request in front of the elevator, then the request in back can be chosen. | ||
43 | Backward seeks are also limited to a maximum of MAXBACK (1024*1024) sectors. | ||
44 | This favors forward movement of the elevator, while allowing opportunistic | ||
45 | "short" backward seeks. | ||
46 | |||
47 | 2. FIFO expiration times for reads and for writes. | ||
48 | |||
49 | This is again very similar to the deadline IO scheduler. The expiration | ||
50 | times for requests on these lists is tunable using the parameters read_expire | ||
51 | and write_expire discussed below. When a read or a write expires in this way, | ||
52 | the IO scheduler will interrupt its current elevator sweep or read anticipation | ||
53 | to service the expired request. | ||
54 | |||
55 | 3. Read and write request batching | ||
56 | |||
57 | A batch is a collection of read requests or a collection of write | ||
58 | requests. The as scheduler alternates dispatching read and write batches | ||
59 | to the driver. In the case a read batch, the scheduler submits read | ||
60 | requests to the driver as long as there are read requests to submit, and | ||
61 | the read batch time limit has not been exceeded (read_batch_expire). | ||
62 | The read batch time limit begins counting down only when there are | ||
63 | competing write requests pending. | ||
64 | |||
65 | In the case of a write batch, the scheduler submits write requests to | ||
66 | the driver as long as there are write requests available, and the | ||
67 | write batch time limit has not been exceeded (write_batch_expire). | ||
68 | However, the length of write batches will be gradually shortened | ||
69 | when read batches frequently exceed their time limit. | ||
70 | |||
71 | When changing between batch types, the scheduler waits for all requests | ||
72 | from the previous batch to complete before scheduling requests for the | ||
73 | next batch. | ||
74 | |||
75 | The read and write fifo expiration times described in policy 2 above | ||
76 | are checked only when in scheduling IO of a batch for the corresponding | ||
77 | (read/write) type. So for example, the read FIFO timeout values are | ||
78 | tested only during read batches. Likewise, the write FIFO timeout | ||
79 | values are tested only during write batches. For this reason, | ||
80 | it is generally not recommended for the read batch time | ||
81 | to be longer than the write expiration time, nor for the write batch | ||
82 | time to exceed the read expiration time (see tunable parameters below). | ||
83 | |||
84 | When the IO scheduler changes from a read to a write batch, | ||
85 | it begins the elevator from the request that is on the head of the | ||
86 | write expiration FIFO. Likewise, when changing from a write batch to | ||
87 | a read batch, scheduler begins the elevator from the first entry | ||
88 | on the read expiration FIFO. | ||
89 | |||
90 | 4. Read anticipation. | ||
91 | |||
92 | Read anticipation occurs only when scheduling a read batch. | ||
93 | This implementation of read anticipation allows only one read request | ||
94 | to be dispatched to the disk controller at a time. In | ||
95 | contrast, many write requests may be dispatched to the disk controller | ||
96 | at a time during a write batch. It is this characteristic that can make | ||
97 | the anticipatory scheduler perform anomalously with controllers supporting | ||
98 | TCQ, or with hardware striped RAID devices. Setting the antic_expire | ||
99 | queue parameter (see below) to zero disables this behavior, and the | ||
100 | anticipatory scheduler behaves essentially like the deadline scheduler. | ||
101 | |||
102 | When read anticipation is enabled (antic_expire is not zero), reads | ||
103 | are dispatched to the disk controller one at a time. | ||
104 | At the end of each read request, the IO scheduler examines its next | ||
105 | candidate read request from its sorted read list. If that next request | ||
106 | is from the same process as the request that just completed, | ||
107 | or if the next request in the queue is "very close" to the | ||
108 | just completed request, it is dispatched immediately. Otherwise, | ||
109 | statistics (average think time, average seek distance) on the process | ||
110 | that submitted the just completed request are examined. If it seems | ||
111 | likely that that process will submit another request soon, and that | ||
112 | request is likely to be near the just completed request, then the IO | ||
113 | scheduler will stop dispatching more read requests for up to (antic_expire) | ||
114 | milliseconds, hoping that process will submit a new request near the one | ||
115 | that just completed. If such a request is made, then it is dispatched | ||
116 | immediately. If the antic_expire wait time expires, then the IO scheduler | ||
117 | will dispatch the next read request from the sorted read queue. | ||
118 | |||
119 | To decide whether an anticipatory wait is worthwhile, the scheduler | ||
120 | maintains statistics for each process that can be used to compute | ||
121 | mean "think time" (the time between read requests), and mean seek | ||
122 | distance for that process. One observation is that these statistics | ||
123 | are associated with each process, but those statistics are not associated | ||
124 | with a specific IO device. So for example, if a process is doing IO | ||
125 | on several file systems on separate devices, the statistics will be | ||
126 | a combination of IO behavior from all those devices. | ||
127 | |||
128 | |||
129 | Tuning the anticipatory IO scheduler | ||
130 | ------------------------------------ | ||
131 | When using 'as', the anticipatory IO scheduler there are 5 parameters under | ||
132 | /sys/block/*/queue/iosched/. All are units of milliseconds. | ||
133 | |||
134 | The parameters are: | ||
135 | * read_expire | ||
136 | Controls how long until a read request becomes "expired". It also controls the | ||
137 | interval between which expired requests are served, so set to 50, a request | ||
138 | might take anywhere < 100ms to be serviced _if_ it is the next on the | ||
139 | expired list. Obviously request expiration strategies won't make the disk | ||
140 | go faster. The result basically equates to the timeslice a single reader | ||
141 | gets in the presence of other IO. 100*((seek time / read_expire) + 1) is | ||
142 | very roughly the % streaming read efficiency your disk should get with | ||
143 | multiple readers. | ||
144 | |||
145 | * read_batch_expire | ||
146 | Controls how much time a batch of reads is given before pending writes are | ||
147 | served. A higher value is more efficient. This might be set below read_expire | ||
148 | if writes are to be given higher priority than reads, but reads are to be | ||
149 | as efficient as possible when there are no writes. Generally though, it | ||
150 | should be some multiple of read_expire. | ||
151 | |||
152 | * write_expire, and | ||
153 | * write_batch_expire are equivalent to the above, for writes. | ||
154 | |||
155 | * antic_expire | ||
156 | Controls the maximum amount of time we can anticipate a good read (one | ||
157 | with a short seek distance from the most recently completed request) before | ||
158 | giving up. Many other factors may cause anticipation to be stopped early, | ||
159 | or some processes will not be "anticipated" at all. Should be a bit higher | ||
160 | for big seek time devices though not a linear correspondence - most | ||
161 | processes have only a few ms thinktime. | ||
162 | |||
163 | In addition to the tunables above there is a read-only file named est_time | ||
164 | which, when read, will show: | ||
165 | |||
166 | - The probability of a task exiting without a cooperating task | ||
167 | submitting an anticipated IO. | ||
168 | |||
169 | - The current mean think time. | ||
170 | |||
171 | - The seek distance used to determine if an incoming IO is better. | ||
172 | |||
diff --git a/Documentation/block/biodoc.txt b/Documentation/block/biodoc.txt index 8d2158a1c6aa..6fab97ea7e6b 100644 --- a/Documentation/block/biodoc.txt +++ b/Documentation/block/biodoc.txt | |||
@@ -186,7 +186,7 @@ a virtual address mapping (unlike the earlier scheme of virtual address | |||
186 | do not have a corresponding kernel virtual address space mapping) and | 186 | do not have a corresponding kernel virtual address space mapping) and |
187 | low-memory pages. | 187 | low-memory pages. |
188 | 188 | ||
189 | Note: Please refer to Documentation/DMA-mapping.txt for a discussion | 189 | Note: Please refer to Documentation/PCI/PCI-DMA-mapping.txt for a discussion |
190 | on PCI high mem DMA aspects and mapping of scatter gather lists, and support | 190 | on PCI high mem DMA aspects and mapping of scatter gather lists, and support |
191 | for 64 bit PCI. | 191 | for 64 bit PCI. |
192 | 192 | ||
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 5b5db085fbf0..2f93ac06c414 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt | |||
@@ -472,3 +472,52 @@ Why: These two features use non-standard interfaces. There are the | |||
472 | Who: Corentin Chary <corentin.chary@gmail.com> | 472 | Who: Corentin Chary <corentin.chary@gmail.com> |
473 | 473 | ||
474 | ---------------------------- | 474 | ---------------------------- |
475 | |||
476 | What: usbvideo quickcam_messenger driver | ||
477 | When: 2.6.35 | ||
478 | Files: drivers/media/video/usbvideo/quickcam_messenger.[ch] | ||
479 | Why: obsolete v4l1 driver replaced by gspca_stv06xx | ||
480 | Who: Hans de Goede <hdegoede@redhat.com> | ||
481 | |||
482 | ---------------------------- | ||
483 | |||
484 | What: ov511 v4l1 driver | ||
485 | When: 2.6.35 | ||
486 | Files: drivers/media/video/ov511.[ch] | ||
487 | Why: obsolete v4l1 driver replaced by gspca_ov519 | ||
488 | Who: Hans de Goede <hdegoede@redhat.com> | ||
489 | |||
490 | ---------------------------- | ||
491 | |||
492 | What: w9968cf v4l1 driver | ||
493 | When: 2.6.35 | ||
494 | Files: drivers/media/video/w9968cf*.[ch] | ||
495 | Why: obsolete v4l1 driver replaced by gspca_ov519 | ||
496 | Who: Hans de Goede <hdegoede@redhat.com> | ||
497 | |||
498 | ---------------------------- | ||
499 | |||
500 | What: ovcamchip sensor framework | ||
501 | When: 2.6.35 | ||
502 | Files: drivers/media/video/ovcamchip/* | ||
503 | Why: Only used by obsoleted v4l1 drivers | ||
504 | Who: Hans de Goede <hdegoede@redhat.com> | ||
505 | |||
506 | ---------------------------- | ||
507 | |||
508 | What: stv680 v4l1 driver | ||
509 | When: 2.6.35 | ||
510 | Files: drivers/media/video/stv680.[ch] | ||
511 | Why: obsolete v4l1 driver replaced by gspca_stv0680 | ||
512 | Who: Hans de Goede <hdegoede@redhat.com> | ||
513 | |||
514 | ---------------------------- | ||
515 | |||
516 | What: zc0301 v4l driver | ||
517 | When: 2.6.35 | ||
518 | Files: drivers/media/video/zc0301/* | ||
519 | Why: Duplicate functionality with the gspca_zc3xx driver, zc0301 only | ||
520 | supports 2 USB-ID's (because it only supports a limited set of | ||
521 | sensors) wich are also supported by the gspca_zc3xx driver | ||
522 | (which supports 53 USB-ID's in total) | ||
523 | Who: Hans de Goede <hdegoede@redhat.com> | ||
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt index af6885c3c821..e1def1786e50 100644 --- a/Documentation/filesystems/ext4.txt +++ b/Documentation/filesystems/ext4.txt | |||
@@ -196,7 +196,7 @@ nobarrier This also requires an IO stack which can support | |||
196 | also be used to enable or disable barriers, for | 196 | also be used to enable or disable barriers, for |
197 | consistency with other ext4 mount options. | 197 | consistency with other ext4 mount options. |
198 | 198 | ||
199 | inode_readahead=n This tuning parameter controls the maximum | 199 | inode_readahead_blks=n This tuning parameter controls the maximum |
200 | number of inode table blocks that ext4's inode | 200 | number of inode table blocks that ext4's inode |
201 | table readahead algorithm will pre-read into | 201 | table readahead algorithm will pre-read into |
202 | the buffer cache. The default value is 32 blocks. | 202 | the buffer cache. The default value is 32 blocks. |
diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt index 4949fcaa6b6a..839efd8a8a8c 100644 --- a/Documentation/filesystems/nilfs2.txt +++ b/Documentation/filesystems/nilfs2.txt | |||
@@ -28,7 +28,7 @@ described in the man pages included in the package. | |||
28 | Project web page: http://www.nilfs.org/en/ | 28 | Project web page: http://www.nilfs.org/en/ |
29 | Download page: http://www.nilfs.org/en/download.html | 29 | Download page: http://www.nilfs.org/en/download.html |
30 | Git tree web page: http://www.nilfs.org/git/ | 30 | Git tree web page: http://www.nilfs.org/git/ |
31 | NILFS mailing lists: http://www.nilfs.org/mailman/listinfo/users | 31 | List info: http://vger.kernel.org/vger-lists.html#linux-nilfs |
32 | 32 | ||
33 | Caveats | 33 | Caveats |
34 | ======= | 34 | ======= |
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index 220cc6376ef8..0d07513a67a6 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt | |||
@@ -177,7 +177,6 @@ read the file /proc/PID/status: | |||
177 | CapBnd: ffffffffffffffff | 177 | CapBnd: ffffffffffffffff |
178 | voluntary_ctxt_switches: 0 | 178 | voluntary_ctxt_switches: 0 |
179 | nonvoluntary_ctxt_switches: 1 | 179 | nonvoluntary_ctxt_switches: 1 |
180 | Stack usage: 12 kB | ||
181 | 180 | ||
182 | This shows you nearly the same information you would get if you viewed it with | 181 | This shows you nearly the same information you would get if you viewed it with |
183 | the ps command. In fact, ps uses the proc file system to obtain its | 182 | the ps command. In fact, ps uses the proc file system to obtain its |
@@ -231,7 +230,6 @@ Table 1-2: Contents of the statm files (as of 2.6.30-rc7) | |||
231 | Mems_allowed_list Same as previous, but in "list format" | 230 | Mems_allowed_list Same as previous, but in "list format" |
232 | voluntary_ctxt_switches number of voluntary context switches | 231 | voluntary_ctxt_switches number of voluntary context switches |
233 | nonvoluntary_ctxt_switches number of non voluntary context switches | 232 | nonvoluntary_ctxt_switches number of non voluntary context switches |
234 | Stack usage: stack usage high water mark (round up to page size) | ||
235 | .............................................................................. | 233 | .............................................................................. |
236 | 234 | ||
237 | Table 1-3: Contents of the statm files (as of 2.6.8-rc3) | 235 | Table 1-3: Contents of the statm files (as of 2.6.8-rc3) |
diff --git a/Documentation/hwmon/amc6821 b/Documentation/hwmon/amc6821 new file mode 100644 index 000000000000..ced8359c50f8 --- /dev/null +++ b/Documentation/hwmon/amc6821 | |||
@@ -0,0 +1,102 @@ | |||
1 | Kernel driver amc6821 | ||
2 | ===================== | ||
3 | |||
4 | Supported chips: | ||
5 | Texas Instruments AMC6821 | ||
6 | Prefix: 'amc6821' | ||
7 | Addresses scanned: 0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, 0x4c, 0x4d, 0x4e | ||
8 | Datasheet: http://focus.ti.com/docs/prod/folders/print/amc6821.html | ||
9 | |||
10 | Authors: | ||
11 | Tomaz Mertelj <tomaz.mertelj@guest.arnes.si> | ||
12 | |||
13 | |||
14 | Description | ||
15 | ----------- | ||
16 | |||
17 | This driver implements support for the Texas Instruments amc6821 chip. | ||
18 | The chip has one on-chip and one remote temperature sensor and one pwm fan | ||
19 | regulator. | ||
20 | The pwm can be controlled either from software or automatically. | ||
21 | |||
22 | The driver provides the following sensor accesses in sysfs: | ||
23 | |||
24 | temp1_input ro on-chip temperature | ||
25 | temp1_min rw " | ||
26 | temp1_max rw " | ||
27 | temp1_crit rw " | ||
28 | temp1_min_alarm ro " | ||
29 | temp1_max_alarm ro " | ||
30 | temp1_crit_alarm ro " | ||
31 | |||
32 | temp2_input ro remote temperature | ||
33 | temp2_min rw " | ||
34 | temp2_max rw " | ||
35 | temp2_crit rw " | ||
36 | temp2_min_alarm ro " | ||
37 | temp2_max_alarm ro " | ||
38 | temp2_crit_alarm ro " | ||
39 | temp2_fault ro " | ||
40 | |||
41 | fan1_input ro tachometer speed | ||
42 | fan1_min rw " | ||
43 | fan1_max rw " | ||
44 | fan1_fault ro " | ||
45 | fan1_div rw Fan divisor can be either 2 or 4. | ||
46 | |||
47 | pwm1 rw pwm1 | ||
48 | pwm1_enable rw regulator mode, 1=open loop, 2=fan controlled | ||
49 | by remote temperature, 3=fan controlled by | ||
50 | combination of the on-chip temperature and | ||
51 | remote-sensor temperature, | ||
52 | pwm1_auto_channels_temp ro 1 if pwm_enable==2, 3 if pwm_enable==3 | ||
53 | pwm1_auto_point1_pwm ro Hardwired to 0, shared for both | ||
54 | temperature channels. | ||
55 | pwm1_auto_point2_pwm rw This value is shared for both temperature | ||
56 | channels. | ||
57 | pwm1_auto_point3_pwm rw Hardwired to 255, shared for both | ||
58 | temperature channels. | ||
59 | |||
60 | temp1_auto_point1_temp ro Hardwired to temp2_auto_point1_temp | ||
61 | which is rw. Below this temperature fan stops. | ||
62 | temp1_auto_point2_temp rw The low-temperature limit of the proportional | ||
63 | range. Below this temperature | ||
64 | pwm1 = pwm1_auto_point2_pwm. It can go from | ||
65 | 0 degree C to 124 degree C in steps of | ||
66 | 4 degree C. Read it out after writing to get | ||
67 | the actual value. | ||
68 | temp1_auto_point3_temp rw Above this temperature fan runs at maximum | ||
69 | speed. It can go from temp1_auto_point2_temp. | ||
70 | It can only have certain discrete values | ||
71 | which depend on temp1_auto_point2_temp and | ||
72 | pwm1_auto_point2_pwm. Read it out after | ||
73 | writing to get the actual value. | ||
74 | |||
75 | temp2_auto_point1_temp rw Must be between 0 degree C and 63 degree C and | ||
76 | it defines the passive cooling temperature. | ||
77 | Below this temperature the fan stops in | ||
78 | the closed loop mode. | ||
79 | temp2_auto_point2_temp rw The low-temperature limit of the proportional | ||
80 | range. Below this temperature | ||
81 | pwm1 = pwm1_auto_point2_pwm. It can go from | ||
82 | 0 degree C to 124 degree C in steps | ||
83 | of 4 degree C. | ||
84 | |||
85 | temp2_auto_point3_temp rw Above this temperature fan runs at maximum | ||
86 | speed. It can only have certain discrete | ||
87 | values which depend on temp2_auto_point2_temp | ||
88 | and pwm1_auto_point2_pwm. Read it out after | ||
89 | writing to get actual value. | ||
90 | |||
91 | |||
92 | Module parameters | ||
93 | ----------------- | ||
94 | |||
95 | If your board has a BIOS that initializes the amc6821 correctly, you should | ||
96 | load the module with: init=0. | ||
97 | |||
98 | If your board BIOS doesn't initialize the chip, or you want | ||
99 | different settings, you can set the following parameters: | ||
100 | init=1, | ||
101 | pwminv: 0 default pwm output, 1 inverts pwm output. | ||
102 | |||
diff --git a/Documentation/hwmon/k10temp b/Documentation/hwmon/k10temp index a7a18d453a51..6526eee525a6 100644 --- a/Documentation/hwmon/k10temp +++ b/Documentation/hwmon/k10temp | |||
@@ -3,8 +3,8 @@ Kernel driver k10temp | |||
3 | 3 | ||
4 | Supported chips: | 4 | Supported chips: |
5 | * AMD Family 10h processors: | 5 | * AMD Family 10h processors: |
6 | Socket F: Quad-Core/Six-Core/Embedded Opteron | 6 | Socket F: Quad-Core/Six-Core/Embedded Opteron (but see below) |
7 | Socket AM2+: Opteron, Phenom (II) X3/X4 | 7 | Socket AM2+: Quad-Core Opteron, Phenom (II) X3/X4, Athlon X2 (but see below) |
8 | Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II | 8 | Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II |
9 | Socket S1G3: Athlon II, Sempron, Turion II | 9 | Socket S1G3: Athlon II, Sempron, Turion II |
10 | * AMD Family 11h processors: | 10 | * AMD Family 11h processors: |
@@ -36,10 +36,15 @@ Description | |||
36 | This driver permits reading of the internal temperature sensor of AMD | 36 | This driver permits reading of the internal temperature sensor of AMD |
37 | Family 10h and 11h processors. | 37 | Family 10h and 11h processors. |
38 | 38 | ||
39 | All these processors have a sensor, but on older revisions of Family 10h | 39 | All these processors have a sensor, but on those for Socket F or AM2+, |
40 | processors, the sensor may return inconsistent values (erratum 319). The | 40 | the sensor may return inconsistent values (erratum 319). The driver |
41 | driver will refuse to load on these revisions unless you specify the | 41 | will refuse to load on these revisions unless you specify the "force=1" |
42 | "force=1" module parameter. | 42 | module parameter. |
43 | |||
44 | Due to technical reasons, the driver can detect only the mainboard's | ||
45 | socket type, not the processor's actual capabilities. Therefore, if you | ||
46 | are using an AM3 processor on an AM2+ mainboard, you can safely use the | ||
47 | "force=1" parameter. | ||
43 | 48 | ||
44 | There is one temperature measurement value, available as temp1_input in | 49 | There is one temperature measurement value, available as temp1_input in |
45 | sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. | 50 | sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. |
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt index 947374977ca5..35cf64d4436d 100644 --- a/Documentation/ioctl/ioctl-number.txt +++ b/Documentation/ioctl/ioctl-number.txt | |||
@@ -56,10 +56,11 @@ Following this convention is good because: | |||
56 | (5) When following the convention, the driver code can use generic | 56 | (5) When following the convention, the driver code can use generic |
57 | code to copy the parameters between user and kernel space. | 57 | code to copy the parameters between user and kernel space. |
58 | 58 | ||
59 | This table lists ioctls visible from user land for Linux/i386. It contains | 59 | This table lists ioctls visible from user land for Linux/x86. It contains |
60 | most drivers up to 2.3.14, but I know I am missing some. | 60 | most drivers up to 2.6.31, but I know I am missing some. There has been |
61 | no attempt to list non-X86 architectures or ioctls from drivers/staging/. | ||
61 | 62 | ||
62 | Code Seq# Include File Comments | 63 | Code Seq#(hex) Include File Comments |
63 | ======================================================== | 64 | ======================================================== |
64 | 0x00 00-1F linux/fs.h conflict! | 65 | 0x00 00-1F linux/fs.h conflict! |
65 | 0x00 00-1F scsi/scsi_ioctl.h conflict! | 66 | 0x00 00-1F scsi/scsi_ioctl.h conflict! |
@@ -69,119 +70,228 @@ Code Seq# Include File Comments | |||
69 | 0x03 all linux/hdreg.h | 70 | 0x03 all linux/hdreg.h |
70 | 0x04 D2-DC linux/umsdos_fs.h Dead since 2.6.11, but don't reuse these. | 71 | 0x04 D2-DC linux/umsdos_fs.h Dead since 2.6.11, but don't reuse these. |
71 | 0x06 all linux/lp.h | 72 | 0x06 all linux/lp.h |
72 | 0x09 all linux/md.h | 73 | 0x09 all linux/raid/md_u.h |
74 | 0x10 00-0F drivers/char/s390/vmcp.h | ||
73 | 0x12 all linux/fs.h | 75 | 0x12 all linux/fs.h |
74 | linux/blkpg.h | 76 | linux/blkpg.h |
75 | 0x1b all InfiniBand Subsystem <http://www.openib.org/> | 77 | 0x1b all InfiniBand Subsystem <http://www.openib.org/> |
76 | 0x20 all drivers/cdrom/cm206.h | 78 | 0x20 all drivers/cdrom/cm206.h |
77 | 0x22 all scsi/sg.h | 79 | 0x22 all scsi/sg.h |
78 | '#' 00-3F IEEE 1394 Subsystem Block for the entire subsystem | 80 | '#' 00-3F IEEE 1394 Subsystem Block for the entire subsystem |
81 | '$' 00-0F linux/perf_counter.h, linux/perf_event.h | ||
79 | '1' 00-1F <linux/timepps.h> PPS kit from Ulrich Windl | 82 | '1' 00-1F <linux/timepps.h> PPS kit from Ulrich Windl |
80 | <ftp://ftp.de.kernel.org/pub/linux/daemons/ntp/PPS/> | 83 | <ftp://ftp.de.kernel.org/pub/linux/daemons/ntp/PPS/> |
84 | '2' 01-04 linux/i2o.h | ||
85 | '3' 00-0F drivers/s390/char/raw3270.h conflict! | ||
86 | '3' 00-1F linux/suspend_ioctls.h conflict! | ||
87 | and kernel/power/user.c | ||
81 | '8' all SNP8023 advanced NIC card | 88 | '8' all SNP8023 advanced NIC card |
82 | <mailto:mcr@solidum.com> | 89 | <mailto:mcr@solidum.com> |
83 | 'A' 00-1F linux/apm_bios.h | 90 | '@' 00-0F linux/radeonfb.h conflict! |
91 | '@' 00-0F drivers/video/aty/aty128fb.c conflict! | ||
92 | 'A' 00-1F linux/apm_bios.h conflict! | ||
93 | 'A' 00-0F linux/agpgart.h conflict! | ||
94 | and drivers/char/agp/compat_ioctl.h | ||
95 | 'A' 00-7F sound/asound.h conflict! | ||
96 | 'B' 00-1F linux/cciss_ioctl.h conflict! | ||
97 | 'B' 00-0F include/linux/pmu.h conflict! | ||
84 | 'B' C0-FF advanced bbus | 98 | 'B' C0-FF advanced bbus |
85 | <mailto:maassen@uni-freiburg.de> | 99 | <mailto:maassen@uni-freiburg.de> |
86 | 'C' all linux/soundcard.h | 100 | 'C' all linux/soundcard.h conflict! |
101 | 'C' 01-2F linux/capi.h conflict! | ||
102 | 'C' F0-FF drivers/net/wan/cosa.h conflict! | ||
87 | 'D' all arch/s390/include/asm/dasd.h | 103 | 'D' all arch/s390/include/asm/dasd.h |
88 | 'E' all linux/input.h | 104 | 'D' 40-5F drivers/scsi/dpt/dtpi_ioctl.h |
89 | 'F' all linux/fb.h | 105 | 'D' 05 drivers/scsi/pmcraid.h |
90 | 'H' all linux/hiddev.h | 106 | 'E' all linux/input.h conflict! |
91 | 'I' all linux/isdn.h | 107 | 'E' 00-0F xen/evtchn.h conflict! |
108 | 'F' all linux/fb.h conflict! | ||
109 | 'F' 01-02 drivers/scsi/pmcraid.h conflict! | ||
110 | 'F' 20 drivers/video/fsl-diu-fb.h conflict! | ||
111 | 'F' 20 drivers/video/intelfb/intelfb.h conflict! | ||
112 | 'F' 20 linux/ivtvfb.h conflict! | ||
113 | 'F' 20 linux/matroxfb.h conflict! | ||
114 | 'F' 20 drivers/video/aty/atyfb_base.c conflict! | ||
115 | 'F' 00-0F video/da8xx-fb.h conflict! | ||
116 | 'F' 80-8F linux/arcfb.h conflict! | ||
117 | 'F' DD video/sstfb.h conflict! | ||
118 | 'G' 00-3F drivers/misc/sgi-gru/grulib.h conflict! | ||
119 | 'G' 00-0F linux/gigaset_dev.h conflict! | ||
120 | 'H' 00-7F linux/hiddev.h conflict! | ||
121 | 'H' 00-0F linux/hidraw.h conflict! | ||
122 | 'H' 00-0F sound/asound.h conflict! | ||
123 | 'H' 20-40 sound/asound_fm.h conflict! | ||
124 | 'H' 80-8F sound/sfnt_info.h conflict! | ||
125 | 'H' 10-8F sound/emu10k1.h conflict! | ||
126 | 'H' 10-1F sound/sb16_csp.h conflict! | ||
127 | 'H' 10-1F sound/hda_hwdep.h conflict! | ||
128 | 'H' 40-4F sound/hdspm.h conflict! | ||
129 | 'H' 40-4F sound/hdsp.h conflict! | ||
130 | 'H' 90 sound/usb/usx2y/usb_stream.h | ||
131 | 'H' C0-F0 net/bluetooth/hci.h conflict! | ||
132 | 'H' C0-DF net/bluetooth/hidp/hidp.h conflict! | ||
133 | 'H' C0-DF net/bluetooth/cmtp/cmtp.h conflict! | ||
134 | 'H' C0-DF net/bluetooth/bnep/bnep.h conflict! | ||
135 | 'I' all linux/isdn.h conflict! | ||
136 | 'I' 00-0F drivers/isdn/divert/isdn_divert.h conflict! | ||
137 | 'I' 40-4F linux/mISDNif.h conflict! | ||
92 | 'J' 00-1F drivers/scsi/gdth_ioctl.h | 138 | 'J' 00-1F drivers/scsi/gdth_ioctl.h |
93 | 'K' all linux/kd.h | 139 | 'K' all linux/kd.h |
94 | 'L' 00-1F linux/loop.h | 140 | 'L' 00-1F linux/loop.h conflict! |
95 | 'L' 20-2F driver/usb/misc/vstusb.h | 141 | 'L' 10-1F drivers/scsi/mpt2sas/mpt2sas_ctl.h conflict! |
142 | 'L' 20-2F linux/usb/vstusb.h | ||
96 | 'L' E0-FF linux/ppdd.h encrypted disk device driver | 143 | 'L' E0-FF linux/ppdd.h encrypted disk device driver |
97 | <http://linux01.gwdg.de/~alatham/ppdd.html> | 144 | <http://linux01.gwdg.de/~alatham/ppdd.html> |
98 | 'M' all linux/soundcard.h | 145 | 'M' all linux/soundcard.h conflict! |
146 | 'M' 01-16 mtd/mtd-abi.h conflict! | ||
147 | and drivers/mtd/mtdchar.c | ||
148 | 'M' 01-03 drivers/scsi/megaraid/megaraid_sas.h | ||
149 | 'M' 00-0F drivers/video/fsl-diu-fb.h conflict! | ||
99 | 'N' 00-1F drivers/usb/scanner.h | 150 | 'N' 00-1F drivers/usb/scanner.h |
100 | 'O' 00-02 include/mtd/ubi-user.h UBI | 151 | 'O' 00-06 mtd/ubi-user.h UBI |
101 | 'P' all linux/soundcard.h | 152 | 'P' all linux/soundcard.h conflict! |
153 | 'P' 60-6F sound/sscape_ioctl.h conflict! | ||
154 | 'P' 00-0F drivers/usb/class/usblp.c conflict! | ||
102 | 'Q' all linux/soundcard.h | 155 | 'Q' all linux/soundcard.h |
103 | 'R' 00-1F linux/random.h | 156 | 'R' 00-1F linux/random.h conflict! |
157 | 'R' 01 linux/rfkill.h conflict! | ||
158 | 'R' 01-0F media/rds.h conflict! | ||
159 | 'R' C0-DF net/bluetooth/rfcomm.h | ||
104 | 'S' all linux/cdrom.h conflict! | 160 | 'S' all linux/cdrom.h conflict! |
105 | 'S' 80-81 scsi/scsi_ioctl.h conflict! | 161 | 'S' 80-81 scsi/scsi_ioctl.h conflict! |
106 | 'S' 82-FF scsi/scsi.h conflict! | 162 | 'S' 82-FF scsi/scsi.h conflict! |
163 | 'S' 00-7F sound/asequencer.h conflict! | ||
107 | 'T' all linux/soundcard.h conflict! | 164 | 'T' all linux/soundcard.h conflict! |
165 | 'T' 00-AF sound/asound.h conflict! | ||
108 | 'T' all arch/x86/include/asm/ioctls.h conflict! | 166 | 'T' all arch/x86/include/asm/ioctls.h conflict! |
109 | 'U' 00-EF linux/drivers/usb/usb.h | 167 | 'T' C0-DF linux/if_tun.h conflict! |
110 | 'V' all linux/vt.h | 168 | 'U' all sound/asound.h conflict! |
169 | 'U' 00-0F drivers/media/video/uvc/uvcvideo.h conflict! | ||
170 | 'U' 00-CF linux/uinput.h conflict! | ||
171 | 'U' 00-EF linux/usbdevice_fs.h | ||
172 | 'U' C0-CF drivers/bluetooth/hci_uart.h | ||
173 | 'V' all linux/vt.h conflict! | ||
174 | 'V' all linux/videodev2.h conflict! | ||
175 | 'V' C0 linux/ivtvfb.h conflict! | ||
176 | 'V' C0 linux/ivtv.h conflict! | ||
177 | 'V' C0 media/davinci/vpfe_capture.h conflict! | ||
178 | 'V' C0 media/si4713.h conflict! | ||
179 | 'V' C0-CF drivers/media/video/mxb.h conflict! | ||
111 | 'W' 00-1F linux/watchdog.h conflict! | 180 | 'W' 00-1F linux/watchdog.h conflict! |
112 | 'W' 00-1F linux/wanrouter.h conflict! | 181 | 'W' 00-1F linux/wanrouter.h conflict! |
113 | 'X' all linux/xfs_fs.h | 182 | 'W' 00-3F sound/asound.h conflict! |
183 | 'X' all fs/xfs/xfs_fs.h conflict! | ||
184 | and fs/xfs/linux-2.6/xfs_ioctl32.h | ||
185 | and include/linux/falloc.h | ||
186 | and linux/fs.h | ||
187 | 'X' all fs/ocfs2/ocfs_fs.h conflict! | ||
188 | 'X' 01 linux/pktcdvd.h conflict! | ||
114 | 'Y' all linux/cyclades.h | 189 | 'Y' all linux/cyclades.h |
115 | '[' 00-07 linux/usb/usbtmc.h USB Test and Measurement Devices | 190 | 'Z' 14-15 drivers/message/fusion/mptctl.h |
191 | '[' 00-07 linux/usb/tmc.h USB Test and Measurement Devices | ||
116 | <mailto:gregkh@suse.de> | 192 | <mailto:gregkh@suse.de> |
117 | 'a' all ATM on linux | 193 | 'a' all linux/atm*.h, linux/sonet.h ATM on linux |
118 | <http://lrcwww.epfl.ch/linux-atm/magic.html> | 194 | <http://lrcwww.epfl.ch/linux-atm/magic.html> |
119 | 'b' 00-FF bit3 vme host bridge | 195 | 'b' 00-FF conflict! bit3 vme host bridge |
120 | <mailto:natalia@nikhefk.nikhef.nl> | 196 | <mailto:natalia@nikhefk.nikhef.nl> |
197 | 'b' 00-0F media/bt819.h conflict! | ||
198 | 'c' all linux/cm4000_cs.h conflict! | ||
121 | 'c' 00-7F linux/comstats.h conflict! | 199 | 'c' 00-7F linux/comstats.h conflict! |
122 | 'c' 00-7F linux/coda.h conflict! | 200 | 'c' 00-7F linux/coda.h conflict! |
123 | 'c' 80-9F arch/s390/include/asm/chsc.h | 201 | 'c' 00-1F linux/chio.h conflict! |
124 | 'c' A0-AF arch/x86/include/asm/msr.h | 202 | 'c' 80-9F arch/s390/include/asm/chsc.h conflict! |
203 | 'c' A0-AF arch/x86/include/asm/msr.h conflict! | ||
125 | 'd' 00-FF linux/char/drm/drm/h conflict! | 204 | 'd' 00-FF linux/char/drm/drm/h conflict! |
205 | 'd' 02-40 pcmcia/ds.h conflict! | ||
206 | 'd' 10-3F drivers/media/video/dabusb.h conflict! | ||
207 | 'd' C0-CF drivers/media/video/saa7191.h conflict! | ||
126 | 'd' F0-FF linux/digi1.h | 208 | 'd' F0-FF linux/digi1.h |
127 | 'e' all linux/digi1.h conflict! | 209 | 'e' all linux/digi1.h conflict! |
128 | 'e' 00-1F net/irda/irtty.h conflict! | 210 | 'e' 00-1F drivers/net/irda/irtty-sir.h conflict! |
129 | 'f' 00-1F linux/ext2_fs.h | 211 | 'f' 00-1F linux/ext2_fs.h conflict! |
130 | 'h' 00-7F Charon filesystem | 212 | 'f' 00-1F linux/ext3_fs.h conflict! |
213 | 'f' 00-0F fs/jfs/jfs_dinode.h conflict! | ||
214 | 'f' 00-0F fs/ext4/ext4.h conflict! | ||
215 | 'f' 00-0F linux/fs.h conflict! | ||
216 | 'f' 00-0F fs/ocfs2/ocfs2_fs.h conflict! | ||
217 | 'g' 00-0F linux/usb/gadgetfs.h | ||
218 | 'g' 20-2F linux/usb/g_printer.h | ||
219 | 'h' 00-7F conflict! Charon filesystem | ||
131 | <mailto:zapman@interlan.net> | 220 | <mailto:zapman@interlan.net> |
132 | 'i' 00-3F linux/i2o.h | 221 | 'h' 00-1F linux/hpet.h conflict! |
222 | 'i' 00-3F linux/i2o-dev.h conflict! | ||
223 | 'i' 0B-1F linux/ipmi.h conflict! | ||
224 | 'i' 80-8F linux/i8k.h | ||
133 | 'j' 00-3F linux/joystick.h | 225 | 'j' 00-3F linux/joystick.h |
226 | 'k' 00-0F linux/spi/spidev.h conflict! | ||
227 | 'k' 00-05 video/kyro.h conflict! | ||
134 | 'l' 00-3F linux/tcfs_fs.h transparent cryptographic file system | 228 | 'l' 00-3F linux/tcfs_fs.h transparent cryptographic file system |
135 | <http://mikonos.dia.unisa.it/tcfs> | 229 | <http://mikonos.dia.unisa.it/tcfs> |
136 | 'l' 40-7F linux/udf_fs_i.h in development: | 230 | 'l' 40-7F linux/udf_fs_i.h in development: |
137 | <http://sourceforge.net/projects/linux-udf/> | 231 | <http://sourceforge.net/projects/linux-udf/> |
138 | 'm' 00-09 linux/mmtimer.h | 232 | 'm' 00-09 linux/mmtimer.h conflict! |
139 | 'm' all linux/mtio.h conflict! | 233 | 'm' all linux/mtio.h conflict! |
140 | 'm' all linux/soundcard.h conflict! | 234 | 'm' all linux/soundcard.h conflict! |
141 | 'm' all linux/synclink.h conflict! | 235 | 'm' all linux/synclink.h conflict! |
236 | 'm' 00-19 drivers/message/fusion/mptctl.h conflict! | ||
237 | 'm' 00 drivers/scsi/megaraid/megaraid_ioctl.h conflict! | ||
142 | 'm' 00-1F net/irda/irmod.h conflict! | 238 | 'm' 00-1F net/irda/irmod.h conflict! |
143 | 'n' 00-7F linux/ncp_fs.h | 239 | 'n' 00-7F linux/ncp_fs.h and fs/ncpfs/ioctl.c |
144 | 'n' 80-8F linux/nilfs2_fs.h NILFS2 | 240 | 'n' 80-8F linux/nilfs2_fs.h NILFS2 |
145 | 'n' E0-FF video/matrox.h matroxfb | 241 | 'n' E0-FF linux/matroxfb.h matroxfb |
146 | 'o' 00-1F fs/ocfs2/ocfs2_fs.h OCFS2 | 242 | 'o' 00-1F fs/ocfs2/ocfs2_fs.h OCFS2 |
147 | 'o' 00-03 include/mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps) | 243 | 'o' 00-03 mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps) |
148 | 'o' 40-41 include/mtd/ubi-user.h UBI | 244 | 'o' 40-41 mtd/ubi-user.h UBI |
149 | 'o' 01-A1 include/linux/dvb/*.h DVB | 245 | 'o' 01-A1 linux/dvb/*.h DVB |
150 | 'p' 00-0F linux/phantom.h conflict! (OpenHaptics needs this) | 246 | 'p' 00-0F linux/phantom.h conflict! (OpenHaptics needs this) |
247 | 'p' 00-1F linux/rtc.h conflict! | ||
151 | 'p' 00-3F linux/mc146818rtc.h conflict! | 248 | 'p' 00-3F linux/mc146818rtc.h conflict! |
152 | 'p' 40-7F linux/nvram.h | 249 | 'p' 40-7F linux/nvram.h |
153 | 'p' 80-9F user-space parport | 250 | 'p' 80-9F linux/ppdev.h user-space parport |
154 | <mailto:tim@cyberelk.net> | 251 | <mailto:tim@cyberelk.net> |
155 | 'p' a1-a4 linux/pps.h LinuxPPS | 252 | 'p' A1-A4 linux/pps.h LinuxPPS |
156 | <mailto:giometti@linux.it> | 253 | <mailto:giometti@linux.it> |
157 | 'q' 00-1F linux/serio.h | 254 | 'q' 00-1F linux/serio.h |
158 | 'q' 80-FF Internet PhoneJACK, Internet LineJACK | 255 | 'q' 80-FF linux/telephony.h Internet PhoneJACK, Internet LineJACK |
159 | <http://www.quicknet.net> | 256 | linux/ixjuser.h <http://www.quicknet.net> |
160 | 'r' 00-1F linux/msdos_fs.h | 257 | 'r' 00-1F linux/msdos_fs.h and fs/fat/dir.c |
161 | 's' all linux/cdk.h | 258 | 's' all linux/cdk.h |
162 | 't' 00-7F linux/if_ppp.h | 259 | 't' 00-7F linux/if_ppp.h |
163 | 't' 80-8F linux/isdn_ppp.h | 260 | 't' 80-8F linux/isdn_ppp.h |
261 | 't' 90 linux/toshiba.h | ||
164 | 'u' 00-1F linux/smb_fs.h | 262 | 'u' 00-1F linux/smb_fs.h |
165 | 'v' 00-1F linux/ext2_fs.h conflict! | ||
166 | 'v' all linux/videodev.h conflict! | 263 | 'v' all linux/videodev.h conflict! |
264 | 'v' 00-1F linux/ext2_fs.h conflict! | ||
265 | 'v' 00-1F linux/fs.h conflict! | ||
266 | 'v' 00-0F linux/sonypi.h conflict! | ||
267 | 'v' C0-CF drivers/media/video/ov511.h conflict! | ||
268 | 'v' C0-DF media/pwc-ioctl.h conflict! | ||
269 | 'v' C0-FF linux/meye.h conflict! | ||
270 | 'v' C0-CF drivers/media/video/zoran/zoran.h conflict! | ||
271 | 'v' D0-DF drivers/media/video/cpia2/cpia2dev.h conflict! | ||
167 | 'w' all CERN SCI driver | 272 | 'w' all CERN SCI driver |
168 | 'y' 00-1F packet based user level communications | 273 | 'y' 00-1F packet based user level communications |
169 | <mailto:zapman@interlan.net> | 274 | <mailto:zapman@interlan.net> |
170 | 'z' 00-3F CAN bus card | 275 | 'z' 00-3F CAN bus card conflict! |
171 | <mailto:hdstich@connectu.ulm.circular.de> | 276 | <mailto:hdstich@connectu.ulm.circular.de> |
172 | 'z' 40-7F CAN bus card | 277 | 'z' 40-7F CAN bus card conflict! |
173 | <mailto:oe@port.de> | 278 | <mailto:oe@port.de> |
279 | 'z' 10-4F drivers/s390/crypto/zcrypt_api.h conflict! | ||
174 | 0x80 00-1F linux/fb.h | 280 | 0x80 00-1F linux/fb.h |
175 | 0x81 00-1F linux/videotext.h | 281 | 0x81 00-1F linux/videotext.h |
282 | 0x88 00-3F media/ovcamchip.h | ||
176 | 0x89 00-06 arch/x86/include/asm/sockios.h | 283 | 0x89 00-06 arch/x86/include/asm/sockios.h |
177 | 0x89 0B-DF linux/sockios.h | 284 | 0x89 0B-DF linux/sockios.h |
178 | 0x89 E0-EF linux/sockios.h SIOCPROTOPRIVATE range | 285 | 0x89 E0-EF linux/sockios.h SIOCPROTOPRIVATE range |
286 | 0x89 E0-EF linux/dn.h PROTOPRIVATE range | ||
179 | 0x89 F0-FF linux/sockios.h SIOCDEVPRIVATE range | 287 | 0x89 F0-FF linux/sockios.h SIOCDEVPRIVATE range |
180 | 0x8B all linux/wireless.h | 288 | 0x8B all linux/wireless.h |
181 | 0x8C 00-3F WiNRADiO driver | 289 | 0x8C 00-3F WiNRADiO driver |
182 | <http://www.proximity.com.au/~brian/winradio/> | 290 | <http://www.proximity.com.au/~brian/winradio/> |
183 | 0x90 00 drivers/cdrom/sbpcd.h | 291 | 0x90 00 drivers/cdrom/sbpcd.h |
292 | 0x92 00-0F drivers/usb/mon/mon_bin.c | ||
184 | 0x93 60-7F linux/auto_fs.h | 293 | 0x93 60-7F linux/auto_fs.h |
294 | 0x94 all fs/btrfs/ioctl.h | ||
185 | 0x99 00-0F 537-Addinboard driver | 295 | 0x99 00-0F 537-Addinboard driver |
186 | <mailto:buk@buks.ipn.de> | 296 | <mailto:buk@buks.ipn.de> |
187 | 0xA0 all linux/sdp/sdp.h Industrial Device Project | 297 | 0xA0 all linux/sdp/sdp.h Industrial Device Project |
@@ -192,17 +302,22 @@ Code Seq# Include File Comments | |||
192 | 0xAB 00-1F linux/nbd.h | 302 | 0xAB 00-1F linux/nbd.h |
193 | 0xAC 00-1F linux/raw.h | 303 | 0xAC 00-1F linux/raw.h |
194 | 0xAD 00 Netfilter device in development: | 304 | 0xAD 00 Netfilter device in development: |
195 | <mailto:rusty@rustcorp.com.au> | 305 | <mailto:rusty@rustcorp.com.au> |
196 | 0xAE all linux/kvm.h Kernel-based Virtual Machine | 306 | 0xAE all linux/kvm.h Kernel-based Virtual Machine |
197 | <mailto:kvm@vger.kernel.org> | 307 | <mailto:kvm@vger.kernel.org> |
198 | 0xB0 all RATIO devices in development: | 308 | 0xB0 all RATIO devices in development: |
199 | <mailto:vgo@ratio.de> | 309 | <mailto:vgo@ratio.de> |
200 | 0xB1 00-1F PPPoX <mailto:mostrows@styx.uwaterloo.ca> | 310 | 0xB1 00-1F PPPoX <mailto:mostrows@styx.uwaterloo.ca> |
311 | 0xC0 00-0F linux/usb/iowarrior.h | ||
201 | 0xCB 00-1F CBM serial IEC bus in development: | 312 | 0xCB 00-1F CBM serial IEC bus in development: |
202 | <mailto:michael.klein@puffin.lb.shuttle.de> | 313 | <mailto:michael.klein@puffin.lb.shuttle.de> |
314 | 0xCD 01 linux/reiserfs_fs.h | ||
315 | 0xCF 02 fs/cifs/ioctl.c | ||
316 | 0xDB 00-0F drivers/char/mwave/mwavepub.h | ||
203 | 0xDD 00-3F ZFCP device driver see drivers/s390/scsi/ | 317 | 0xDD 00-3F ZFCP device driver see drivers/s390/scsi/ |
204 | <mailto:aherrman@de.ibm.com> | 318 | <mailto:aherrman@de.ibm.com> |
205 | 0xF3 00-3F video/sisfb.h sisfb (in development) | 319 | 0xF3 00-3F drivers/usb/misc/sisusbvga/sisusb.h sisfb (in development) |
206 | <mailto:thomas@winischhofer.net> | 320 | <mailto:thomas@winischhofer.net> |
207 | 0xF4 00-1F video/mbxfb.h mbxfb | 321 | 0xF4 00-1F video/mbxfb.h mbxfb |
208 | <mailto:raph@8d.com> | 322 | <mailto:raph@8d.com> |
323 | 0xFD all linux/dm-ioctl.h | ||
diff --git a/Documentation/kernel-doc-nano-HOWTO.txt b/Documentation/kernel-doc-nano-HOWTO.txt index 348b9e5e28fc..27a52b35d55b 100644 --- a/Documentation/kernel-doc-nano-HOWTO.txt +++ b/Documentation/kernel-doc-nano-HOWTO.txt | |||
@@ -214,11 +214,13 @@ The format of the block comment is like this: | |||
214 | * (section header: (section description)? )* | 214 | * (section header: (section description)? )* |
215 | (*)?*/ | 215 | (*)?*/ |
216 | 216 | ||
217 | The short function description ***cannot be multiline***, but the other | 217 | All "description" text can span multiple lines, although the |
218 | descriptions can be (and they can contain blank lines). If you continue | 218 | function_name & its short description are traditionally on a single line. |
219 | that initial short description onto a second line, that second line will | 219 | Description text may also contain blank lines (i.e., lines that contain |
220 | appear further down at the beginning of the description section, which is | 220 | only a "*"). |
221 | almost certainly not what you had in mind. | 221 | |
222 | "section header:" names must be unique per function (or struct, | ||
223 | union, typedef, enum). | ||
222 | 224 | ||
223 | Avoid putting a spurious blank line after the function name, or else the | 225 | Avoid putting a spurious blank line after the function name, or else the |
224 | description will be repeated! | 226 | description will be repeated! |
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 5ba4d9dff113..736d45602886 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt | |||
@@ -240,7 +240,7 @@ and is between 256 and 4096 characters. It is defined in the file | |||
240 | 240 | ||
241 | acpi_sleep= [HW,ACPI] Sleep options | 241 | acpi_sleep= [HW,ACPI] Sleep options |
242 | Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig, | 242 | Format: { s3_bios, s3_mode, s3_beep, s4_nohwsig, |
243 | old_ordering, s4_nonvs } | 243 | old_ordering, s4_nonvs, sci_force_enable } |
244 | See Documentation/power/video.txt for information on | 244 | See Documentation/power/video.txt for information on |
245 | s3_bios and s3_mode. | 245 | s3_bios and s3_mode. |
246 | s3_beep is for debugging; it makes the PC's speaker beep | 246 | s3_beep is for debugging; it makes the PC's speaker beep |
@@ -253,6 +253,9 @@ and is between 256 and 4096 characters. It is defined in the file | |||
253 | of _PTS is used by default). | 253 | of _PTS is used by default). |
254 | s4_nonvs prevents the kernel from saving/restoring the | 254 | s4_nonvs prevents the kernel from saving/restoring the |
255 | ACPI NVS memory during hibernation. | 255 | ACPI NVS memory during hibernation. |
256 | sci_force_enable causes the kernel to set SCI_EN directly | ||
257 | on resume from S1/S3 (which is against the ACPI spec, | ||
258 | but some broken systems don't work without it). | ||
256 | 259 | ||
257 | acpi_use_timer_override [HW,ACPI] | 260 | acpi_use_timer_override [HW,ACPI] |
258 | Use timer override. For some broken Nvidia NF5 boards | 261 | Use timer override. For some broken Nvidia NF5 boards |
diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt index e1a114161027..2811e452f756 100644 --- a/Documentation/kvm/api.txt +++ b/Documentation/kvm/api.txt | |||
@@ -685,7 +685,7 @@ struct kvm_vcpu_events { | |||
685 | __u8 pad; | 685 | __u8 pad; |
686 | } nmi; | 686 | } nmi; |
687 | __u32 sipi_vector; | 687 | __u32 sipi_vector; |
688 | __u32 flags; /* must be zero */ | 688 | __u32 flags; |
689 | }; | 689 | }; |
690 | 690 | ||
691 | 4.30 KVM_SET_VCPU_EVENTS | 691 | 4.30 KVM_SET_VCPU_EVENTS |
@@ -701,6 +701,14 @@ vcpu. | |||
701 | 701 | ||
702 | See KVM_GET_VCPU_EVENTS for the data structure. | 702 | See KVM_GET_VCPU_EVENTS for the data structure. |
703 | 703 | ||
704 | Fields that may be modified asynchronously by running VCPUs can be excluded | ||
705 | from the update. These fields are nmi.pending and sipi_vector. Keep the | ||
706 | corresponding bits in the flags field cleared to suppress overwriting the | ||
707 | current in-kernel state. The bits are: | ||
708 | |||
709 | KVM_VCPUEVENT_VALID_NMI_PENDING - transfer nmi.pending to the kernel | ||
710 | KVM_VCPUEVENT_VALID_SIPI_VECTOR - transfer sipi_vector | ||
711 | |||
704 | 712 | ||
705 | 5. The kvm_run structure | 713 | 5. The kvm_run structure |
706 | 714 | ||
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt index 169091f75e6d..75afa1229fd7 100644 --- a/Documentation/laptops/thinkpad-acpi.txt +++ b/Documentation/laptops/thinkpad-acpi.txt | |||
@@ -1092,8 +1092,8 @@ WARNING: | |||
1092 | its level up and down at every change. | 1092 | its level up and down at every change. |
1093 | 1093 | ||
1094 | 1094 | ||
1095 | Volume control | 1095 | Volume control (Console Audio control) |
1096 | -------------- | 1096 | -------------------------------------- |
1097 | 1097 | ||
1098 | procfs: /proc/acpi/ibm/volume | 1098 | procfs: /proc/acpi/ibm/volume |
1099 | ALSA: "ThinkPad Console Audio Control", default ID: "ThinkPadEC" | 1099 | ALSA: "ThinkPad Console Audio Control", default ID: "ThinkPadEC" |
@@ -1110,9 +1110,53 @@ the desktop environment to just provide on-screen-display feedback. | |||
1110 | Software volume control should be done only in the main AC97/HDA | 1110 | Software volume control should be done only in the main AC97/HDA |
1111 | mixer. | 1111 | mixer. |
1112 | 1112 | ||
1113 | This feature allows volume control on ThinkPad models with a digital | 1113 | |
1114 | volume knob (when available, not all models have it), as well as | 1114 | About the ThinkPad Console Audio control: |
1115 | mute/unmute control. The available commands are: | 1115 | |
1116 | ThinkPads have a built-in amplifier and muting circuit that drives the | ||
1117 | console headphone and speakers. This circuit is after the main AC97 | ||
1118 | or HDA mixer in the audio path, and under exclusive control of the | ||
1119 | firmware. | ||
1120 | |||
1121 | ThinkPads have three special hotkeys to interact with the console | ||
1122 | audio control: volume up, volume down and mute. | ||
1123 | |||
1124 | It is worth noting that the normal way the mute function works (on | ||
1125 | ThinkPads that do not have a "mute LED") is: | ||
1126 | |||
1127 | 1. Press mute to mute. It will *always* mute, you can press it as | ||
1128 | many times as you want, and the sound will remain mute. | ||
1129 | |||
1130 | 2. Press either volume key to unmute the ThinkPad (it will _not_ | ||
1131 | change the volume, it will just unmute). | ||
1132 | |||
1133 | This is a very superior design when compared to the cheap software-only | ||
1134 | mute-toggle solution found on normal consumer laptops: you can be | ||
1135 | absolutely sure the ThinkPad will not make noise if you press the mute | ||
1136 | button, no matter the previous state. | ||
1137 | |||
1138 | The IBM ThinkPads, and the earlier Lenovo ThinkPads have variable-gain | ||
1139 | amplifiers driving the speakers and headphone output, and the firmware | ||
1140 | also handles volume control for the headphone and speakers on these | ||
1141 | ThinkPads without any help from the operating system (this volume | ||
1142 | control stage exists after the main AC97 or HDA mixer in the audio | ||
1143 | path). | ||
1144 | |||
1145 | The newer Lenovo models only have firmware mute control, and depend on | ||
1146 | the main HDA mixer to do volume control (which is done by the operating | ||
1147 | system). In this case, the volume keys are filtered out for unmute | ||
1148 | key press (there are some firmware bugs in this area) and delivered as | ||
1149 | normal key presses to the operating system (thinkpad-acpi is not | ||
1150 | involved). | ||
1151 | |||
1152 | |||
1153 | The ThinkPad-ACPI volume control: | ||
1154 | |||
1155 | The preferred way to interact with the Console Audio control is the | ||
1156 | ALSA interface. | ||
1157 | |||
1158 | The legacy procfs interface allows one to read the current state, | ||
1159 | and if volume control is enabled, accepts the following commands: | ||
1116 | 1160 | ||
1117 | echo up >/proc/acpi/ibm/volume | 1161 | echo up >/proc/acpi/ibm/volume |
1118 | echo down >/proc/acpi/ibm/volume | 1162 | echo down >/proc/acpi/ibm/volume |
@@ -1121,12 +1165,10 @@ mute/unmute control. The available commands are: | |||
1121 | echo 'level <level>' >/proc/acpi/ibm/volume | 1165 | echo 'level <level>' >/proc/acpi/ibm/volume |
1122 | 1166 | ||
1123 | The <level> number range is 0 to 14 although not all of them may be | 1167 | The <level> number range is 0 to 14 although not all of them may be |
1124 | distinct. The unmute the volume after the mute command, use either the | 1168 | distinct. To unmute the volume after the mute command, use either the |
1125 | up or down command (the level command will not unmute the volume), or | 1169 | up or down command (the level command will not unmute the volume), or |
1126 | the unmute command. | 1170 | the unmute command. |
1127 | 1171 | ||
1128 | The current volume level and mute state is shown in the file. | ||
1129 | |||
1130 | You can use the volume_capabilities parameter to tell the driver | 1172 | You can use the volume_capabilities parameter to tell the driver |
1131 | whether your thinkpad has volume control or mute-only control: | 1173 | whether your thinkpad has volume control or mute-only control: |
1132 | volume_capabilities=1 for mixers with mute and volume control, | 1174 | volume_capabilities=1 for mixers with mute and volume control, |
diff --git a/Documentation/networking/3c509.txt b/Documentation/networking/3c509.txt index 0643e3b7168c..3c45d5dcd63b 100644 --- a/Documentation/networking/3c509.txt +++ b/Documentation/networking/3c509.txt | |||
@@ -48,11 +48,11 @@ for LILO parameters for doing this: | |||
48 | This configures the first found 3c509 card for IRQ 10, base I/O 0x310, and | 48 | This configures the first found 3c509 card for IRQ 10, base I/O 0x310, and |
49 | transceiver type 3 (10base2). The flag "0x3c509" must be set to avoid conflicts | 49 | transceiver type 3 (10base2). The flag "0x3c509" must be set to avoid conflicts |
50 | with other card types when overriding the I/O address. When the driver is | 50 | with other card types when overriding the I/O address. When the driver is |
51 | loaded as a module, only the IRQ and transceiver setting may be overridden. | 51 | loaded as a module, only the IRQ may be overridden. For example, |
52 | For example, setting two cards to 10base2/IRQ10 and AUI/IRQ11 is done by using | 52 | setting two cards to IRQ10 and IRQ11 is done by using the irq module |
53 | the xcvr and irq module options: | 53 | option: |
54 | 54 | ||
55 | options 3c509 xcvr=3,1 irq=10,11 | 55 | options 3c509 irq=10,11 |
56 | 56 | ||
57 | 57 | ||
58 | (2) Full-duplex mode | 58 | (2) Full-duplex mode |
@@ -77,6 +77,8 @@ operation. | |||
77 | itself full-duplex capable. This is almost certainly one of two things: a full- | 77 | itself full-duplex capable. This is almost certainly one of two things: a full- |
78 | duplex-capable Ethernet switch (*not* a hub), or a full-duplex-capable NIC on | 78 | duplex-capable Ethernet switch (*not* a hub), or a full-duplex-capable NIC on |
79 | another system that's connected directly to the 3c509B via a crossover cable. | 79 | another system that's connected directly to the 3c509B via a crossover cable. |
80 | |||
81 | Full-duplex mode can be enabled using 'ethtool'. | ||
80 | 82 | ||
81 | /////Extremely important caution concerning full-duplex mode///// | 83 | /////Extremely important caution concerning full-duplex mode///// |
82 | Understand that the 3c509B's hardware's full-duplex support is much more | 84 | Understand that the 3c509B's hardware's full-duplex support is much more |
@@ -113,6 +115,8 @@ This insured that merely upgrading the driver from an earlier version would | |||
113 | never automatically enable full-duplex mode in an existing installation; | 115 | never automatically enable full-duplex mode in an existing installation; |
114 | it must always be explicitly enabled via one of these code in order to be | 116 | it must always be explicitly enabled via one of these code in order to be |
115 | activated. | 117 | activated. |
118 | |||
119 | The transceiver type can be changed using 'ethtool'. | ||
116 | 120 | ||
117 | 121 | ||
118 | (4a) Interpretation of error messages and common problems | 122 | (4a) Interpretation of error messages and common problems |
diff --git a/Documentation/sound/alsa/Procfile.txt b/Documentation/sound/alsa/Procfile.txt index 719a819f8cc2..07301de12cc4 100644 --- a/Documentation/sound/alsa/Procfile.txt +++ b/Documentation/sound/alsa/Procfile.txt | |||
@@ -95,7 +95,7 @@ card*/pcm*/xrun_debug | |||
95 | It takes an integer value, can be changed by writing to this | 95 | It takes an integer value, can be changed by writing to this |
96 | file, such as | 96 | file, such as |
97 | 97 | ||
98 | # cat 5 > /proc/asound/card0/pcm0p/xrun_debug | 98 | # echo 5 > /proc/asound/card0/pcm0p/xrun_debug |
99 | 99 | ||
100 | The value consists of the following bit flags: | 100 | The value consists of the following bit flags: |
101 | bit 0 = Enable XRUN/jiffies debug messages | 101 | bit 0 = Enable XRUN/jiffies debug messages |
diff --git a/Documentation/trace/ftrace-design.txt b/Documentation/trace/ftrace-design.txt index 641a1ef2a7ff..239f14b2b55a 100644 --- a/Documentation/trace/ftrace-design.txt +++ b/Documentation/trace/ftrace-design.txt | |||
@@ -53,14 +53,14 @@ size of the mcount call that is embedded in the function). | |||
53 | For example, if the function foo() calls bar(), when the bar() function calls | 53 | For example, if the function foo() calls bar(), when the bar() function calls |
54 | mcount(), the arguments mcount() will pass to the tracer are: | 54 | mcount(), the arguments mcount() will pass to the tracer are: |
55 | "frompc" - the address bar() will use to return to foo() | 55 | "frompc" - the address bar() will use to return to foo() |
56 | "selfpc" - the address bar() (with _mcount() size adjustment) | 56 | "selfpc" - the address bar() (with mcount() size adjustment) |
57 | 57 | ||
58 | Also keep in mind that this mcount function will be called *a lot*, so | 58 | Also keep in mind that this mcount function will be called *a lot*, so |
59 | optimizing for the default case of no tracer will help the smooth running of | 59 | optimizing for the default case of no tracer will help the smooth running of |
60 | your system when tracing is disabled. So the start of the mcount function is | 60 | your system when tracing is disabled. So the start of the mcount function is |
61 | typically the bare min with checking things before returning. That also means | 61 | typically the bare minimum with checking things before returning. That also |
62 | the code flow should usually kept linear (i.e. no branching in the nop case). | 62 | means the code flow should usually be kept linear (i.e. no branching in the nop |
63 | This is of course an optimization and not a hard requirement. | 63 | case). This is of course an optimization and not a hard requirement. |
64 | 64 | ||
65 | Here is some pseudo code that should help (these functions should actually be | 65 | Here is some pseudo code that should help (these functions should actually be |
66 | implemented in assembly): | 66 | implemented in assembly): |
@@ -131,10 +131,10 @@ some functions to save (hijack) and restore the return address. | |||
131 | 131 | ||
132 | The mcount function should check the function pointers ftrace_graph_return | 132 | The mcount function should check the function pointers ftrace_graph_return |
133 | (compare to ftrace_stub) and ftrace_graph_entry (compare to | 133 | (compare to ftrace_stub) and ftrace_graph_entry (compare to |
134 | ftrace_graph_entry_stub). If either of those are not set to the relevant stub | 134 | ftrace_graph_entry_stub). If either of those is not set to the relevant stub |
135 | function, call the arch-specific function ftrace_graph_caller which in turn | 135 | function, call the arch-specific function ftrace_graph_caller which in turn |
136 | calls the arch-specific function prepare_ftrace_return. Neither of these | 136 | calls the arch-specific function prepare_ftrace_return. Neither of these |
137 | function names are strictly required, but you should use them anyways to stay | 137 | function names is strictly required, but you should use them anyway to stay |
138 | consistent across the architecture ports -- easier to compare & contrast | 138 | consistent across the architecture ports -- easier to compare & contrast |
139 | things. | 139 | things. |
140 | 140 | ||
@@ -144,7 +144,7 @@ but the first argument should be a pointer to the "frompc". Typically this is | |||
144 | located on the stack. This allows the function to hijack the return address | 144 | located on the stack. This allows the function to hijack the return address |
145 | temporarily to have it point to the arch-specific function return_to_handler. | 145 | temporarily to have it point to the arch-specific function return_to_handler. |
146 | That function will simply call the common ftrace_return_to_handler function and | 146 | That function will simply call the common ftrace_return_to_handler function and |
147 | that will return the original return address with which, you can return to the | 147 | that will return the original return address with which you can return to the |
148 | original call site. | 148 | original call site. |
149 | 149 | ||
150 | Here is the updated mcount pseudo code: | 150 | Here is the updated mcount pseudo code: |
diff --git a/Documentation/trace/mmiotrace.txt b/Documentation/trace/mmiotrace.txt index 162effbfbdec..664e7386d89e 100644 --- a/Documentation/trace/mmiotrace.txt +++ b/Documentation/trace/mmiotrace.txt | |||
@@ -44,7 +44,8 @@ Check for lost events. | |||
44 | Usage | 44 | Usage |
45 | ----- | 45 | ----- |
46 | 46 | ||
47 | Make sure debugfs is mounted to /sys/kernel/debug. If not, (requires root privileges) | 47 | Make sure debugfs is mounted to /sys/kernel/debug. |
48 | If not (requires root privileges): | ||
48 | $ mount -t debugfs debugfs /sys/kernel/debug | 49 | $ mount -t debugfs debugfs /sys/kernel/debug |
49 | 50 | ||
50 | Check that the driver you are about to trace is not loaded. | 51 | Check that the driver you are about to trace is not loaded. |
@@ -91,7 +92,7 @@ $ dmesg > dmesg.txt | |||
91 | $ tar zcf pciid-nick-mmiotrace.tar.gz mydump.txt lspci.txt dmesg.txt | 92 | $ tar zcf pciid-nick-mmiotrace.tar.gz mydump.txt lspci.txt dmesg.txt |
92 | and then send the .tar.gz file. The trace compresses considerably. Replace | 93 | and then send the .tar.gz file. The trace compresses considerably. Replace |
93 | "pciid" and "nick" with the PCI ID or model name of your piece of hardware | 94 | "pciid" and "nick" with the PCI ID or model name of your piece of hardware |
94 | under investigation and your nick name. | 95 | under investigation and your nickname. |
95 | 96 | ||
96 | 97 | ||
97 | How Mmiotrace Works | 98 | How Mmiotrace Works |
@@ -100,7 +101,7 @@ How Mmiotrace Works | |||
100 | Access to hardware IO-memory is gained by mapping addresses from PCI bus by | 101 | Access to hardware IO-memory is gained by mapping addresses from PCI bus by |
101 | calling one of the ioremap_*() functions. Mmiotrace is hooked into the | 102 | calling one of the ioremap_*() functions. Mmiotrace is hooked into the |
102 | __ioremap() function and gets called whenever a mapping is created. Mapping is | 103 | __ioremap() function and gets called whenever a mapping is created. Mapping is |
103 | an event that is recorded into the trace log. Note, that ISA range mappings | 104 | an event that is recorded into the trace log. Note that ISA range mappings |
104 | are not caught, since the mapping always exists and is returned directly. | 105 | are not caught, since the mapping always exists and is returned directly. |
105 | 106 | ||
106 | MMIO accesses are recorded via page faults. Just before __ioremap() returns, | 107 | MMIO accesses are recorded via page faults. Just before __ioremap() returns, |
@@ -122,11 +123,11 @@ Trace Log Format | |||
122 | ---------------- | 123 | ---------------- |
123 | 124 | ||
124 | The raw log is text and easily filtered with e.g. grep and awk. One record is | 125 | The raw log is text and easily filtered with e.g. grep and awk. One record is |
125 | one line in the log. A record starts with a keyword, followed by keyword | 126 | one line in the log. A record starts with a keyword, followed by keyword- |
126 | dependant arguments. Arguments are separated by a space, or continue until the | 127 | dependent arguments. Arguments are separated by a space, or continue until the |
127 | end of line. The format for version 20070824 is as follows: | 128 | end of line. The format for version 20070824 is as follows: |
128 | 129 | ||
129 | Explanation Keyword Space separated arguments | 130 | Explanation Keyword Space-separated arguments |
130 | --------------------------------------------------------------------------- | 131 | --------------------------------------------------------------------------- |
131 | 132 | ||
132 | read event R width, timestamp, map id, physical, value, PC, PID | 133 | read event R width, timestamp, map id, physical, value, PC, PID |
@@ -136,7 +137,7 @@ iounmap event UNMAP timestamp, map id, PC, PID | |||
136 | marker MARK timestamp, text | 137 | marker MARK timestamp, text |
137 | version VERSION the string "20070824" | 138 | version VERSION the string "20070824" |
138 | info for reader LSPCI one line from lspci -v | 139 | info for reader LSPCI one line from lspci -v |
139 | PCI address map PCIDEV space separated /proc/bus/pci/devices data | 140 | PCI address map PCIDEV space-separated /proc/bus/pci/devices data |
140 | unk. opcode UNKNOWN timestamp, map id, physical, data, PC, PID | 141 | unk. opcode UNKNOWN timestamp, map id, physical, data, PC, PID |
141 | 142 | ||
142 | Timestamp is in seconds with decimals. Physical is a PCI bus address, virtual | 143 | Timestamp is in seconds with decimals. Physical is a PCI bus address, virtual |
diff --git a/Documentation/trace/ring-buffer-design.txt b/Documentation/trace/ring-buffer-design.txt index 5b1d23d604c5..d299ff31df57 100644 --- a/Documentation/trace/ring-buffer-design.txt +++ b/Documentation/trace/ring-buffer-design.txt | |||
@@ -33,9 +33,9 @@ head_page - a pointer to the page that the reader will use next | |||
33 | 33 | ||
34 | tail_page - a pointer to the page that will be written to next | 34 | tail_page - a pointer to the page that will be written to next |
35 | 35 | ||
36 | commit_page - a pointer to the page with the last finished non nested write. | 36 | commit_page - a pointer to the page with the last finished non-nested write. |
37 | 37 | ||
38 | cmpxchg - hardware assisted atomic transaction that performs the following: | 38 | cmpxchg - hardware-assisted atomic transaction that performs the following: |
39 | 39 | ||
40 | A = B iff previous A == C | 40 | A = B iff previous A == C |
41 | 41 | ||
@@ -52,15 +52,15 @@ The Generic Ring Buffer | |||
52 | The ring buffer can be used in either an overwrite mode or in | 52 | The ring buffer can be used in either an overwrite mode or in |
53 | producer/consumer mode. | 53 | producer/consumer mode. |
54 | 54 | ||
55 | Producer/consumer mode is where the producer were to fill up the | 55 | Producer/consumer mode is where if the producer were to fill up the |
56 | buffer before the consumer could free up anything, the producer | 56 | buffer before the consumer could free up anything, the producer |
57 | will stop writing to the buffer. This will lose most recent events. | 57 | will stop writing to the buffer. This will lose most recent events. |
58 | 58 | ||
59 | Overwrite mode is where the produce were to fill up the buffer | 59 | Overwrite mode is where if the producer were to fill up the buffer |
60 | before the consumer could free up anything, the producer will | 60 | before the consumer could free up anything, the producer will |
61 | overwrite the older data. This will lose the oldest events. | 61 | overwrite the older data. This will lose the oldest events. |
62 | 62 | ||
63 | No two writers can write at the same time (on the same per cpu buffer), | 63 | No two writers can write at the same time (on the same per-cpu buffer), |
64 | but a writer may interrupt another writer, but it must finish writing | 64 | but a writer may interrupt another writer, but it must finish writing |
65 | before the previous writer may continue. This is very important to the | 65 | before the previous writer may continue. This is very important to the |
66 | algorithm. The writers act like a "stack". The way interrupts works | 66 | algorithm. The writers act like a "stack". The way interrupts works |
@@ -79,16 +79,16 @@ the interrupt doing a write as well. | |||
79 | 79 | ||
80 | Readers can happen at any time. But no two readers may run at the | 80 | Readers can happen at any time. But no two readers may run at the |
81 | same time, nor can a reader preempt/interrupt another reader. A reader | 81 | same time, nor can a reader preempt/interrupt another reader. A reader |
82 | can not preempt/interrupt a writer, but it may read/consume from the | 82 | cannot preempt/interrupt a writer, but it may read/consume from the |
83 | buffer at the same time as a writer is writing, but the reader must be | 83 | buffer at the same time as a writer is writing, but the reader must be |
84 | on another processor to do so. A reader may read on its own processor | 84 | on another processor to do so. A reader may read on its own processor |
85 | and can be preempted by a writer. | 85 | and can be preempted by a writer. |
86 | 86 | ||
87 | A writer can preempt a reader, but a reader can not preempt a writer. | 87 | A writer can preempt a reader, but a reader cannot preempt a writer. |
88 | But a reader can read the buffer at the same time (on another processor) | 88 | But a reader can read the buffer at the same time (on another processor) |
89 | as a writer. | 89 | as a writer. |
90 | 90 | ||
91 | The ring buffer is made up of a list of pages held together by a link list. | 91 | The ring buffer is made up of a list of pages held together by a linked list. |
92 | 92 | ||
93 | At initialization a reader page is allocated for the reader that is not | 93 | At initialization a reader page is allocated for the reader that is not |
94 | part of the ring buffer. | 94 | part of the ring buffer. |
@@ -102,7 +102,7 @@ the head page. | |||
102 | 102 | ||
103 | The reader has its own page to use. At start up time, this page is | 103 | The reader has its own page to use. At start up time, this page is |
104 | allocated but is not attached to the list. When the reader wants | 104 | allocated but is not attached to the list. When the reader wants |
105 | to read from the buffer, if its page is empty (like it is on start up) | 105 | to read from the buffer, if its page is empty (like it is on start-up), |
106 | it will swap its page with the head_page. The old reader page will | 106 | it will swap its page with the head_page. The old reader page will |
107 | become part of the ring buffer and the head_page will be removed. | 107 | become part of the ring buffer and the head_page will be removed. |
108 | The page after the inserted page (old reader_page) will become the | 108 | The page after the inserted page (old reader_page) will become the |
@@ -206,7 +206,7 @@ The main pointers: | |||
206 | 206 | ||
207 | commit page - the page that last finished a write. | 207 | commit page - the page that last finished a write. |
208 | 208 | ||
209 | The commit page only is updated by the outer most writer in the | 209 | The commit page only is updated by the outermost writer in the |
210 | writer stack. A writer that preempts another writer will not move the | 210 | writer stack. A writer that preempts another writer will not move the |
211 | commit page. | 211 | commit page. |
212 | 212 | ||
@@ -281,7 +281,7 @@ with the previous write. | |||
281 | The commit pointer points to the last write location that was | 281 | The commit pointer points to the last write location that was |
282 | committed without preempting another write. When a write that | 282 | committed without preempting another write. When a write that |
283 | preempted another write is committed, it only becomes a pending commit | 283 | preempted another write is committed, it only becomes a pending commit |
284 | and will not be a full commit till all writes have been committed. | 284 | and will not be a full commit until all writes have been committed. |
285 | 285 | ||
286 | The commit page points to the page that has the last full commit. | 286 | The commit page points to the page that has the last full commit. |
287 | The tail page points to the page with the last write (before | 287 | The tail page points to the page with the last write (before |
@@ -292,7 +292,7 @@ be several pages ahead. If the tail page catches up to the commit | |||
292 | page then no more writes may take place (regardless of the mode | 292 | page then no more writes may take place (regardless of the mode |
293 | of the ring buffer: overwrite and produce/consumer). | 293 | of the ring buffer: overwrite and produce/consumer). |
294 | 294 | ||
295 | The order of pages are: | 295 | The order of pages is: |
296 | 296 | ||
297 | head page | 297 | head page |
298 | commit page | 298 | commit page |
@@ -311,7 +311,7 @@ Possible scenario: | |||
311 | There is a special case that the head page is after either the commit page | 311 | There is a special case that the head page is after either the commit page |
312 | and possibly the tail page. That is when the commit (and tail) page has been | 312 | and possibly the tail page. That is when the commit (and tail) page has been |
313 | swapped with the reader page. This is because the head page is always | 313 | swapped with the reader page. This is because the head page is always |
314 | part of the ring buffer, but the reader page is not. When ever there | 314 | part of the ring buffer, but the reader page is not. Whenever there |
315 | has been less than a full page that has been committed inside the ring buffer, | 315 | has been less than a full page that has been committed inside the ring buffer, |
316 | and a reader swaps out a page, it will be swapping out the commit page. | 316 | and a reader swaps out a page, it will be swapping out the commit page. |
317 | 317 | ||
@@ -338,7 +338,7 @@ and a reader swaps out a page, it will be swapping out the commit page. | |||
338 | In this case, the head page will not move when the tail and commit | 338 | In this case, the head page will not move when the tail and commit |
339 | move back into the ring buffer. | 339 | move back into the ring buffer. |
340 | 340 | ||
341 | The reader can not swap a page into the ring buffer if the commit page | 341 | The reader cannot swap a page into the ring buffer if the commit page |
342 | is still on that page. If the read meets the last commit (real commit | 342 | is still on that page. If the read meets the last commit (real commit |
343 | not pending or reserved), then there is nothing more to read. | 343 | not pending or reserved), then there is nothing more to read. |
344 | The buffer is considered empty until another full commit finishes. | 344 | The buffer is considered empty until another full commit finishes. |
@@ -395,7 +395,7 @@ The main idea behind the lockless algorithm is to combine the moving | |||
395 | of the head_page pointer with the swapping of pages with the reader. | 395 | of the head_page pointer with the swapping of pages with the reader. |
396 | State flags are placed inside the pointer to the page. To do this, | 396 | State flags are placed inside the pointer to the page. To do this, |
397 | each page must be aligned in memory by 4 bytes. This will allow the 2 | 397 | each page must be aligned in memory by 4 bytes. This will allow the 2 |
398 | least significant bits of the address to be used as flags. Since | 398 | least significant bits of the address to be used as flags, since |
399 | they will always be zero for the address. To get the address, | 399 | they will always be zero for the address. To get the address, |
400 | simply mask out the flags. | 400 | simply mask out the flags. |
401 | 401 | ||
@@ -460,7 +460,7 @@ When the reader tries to swap the page with the ring buffer, it | |||
460 | will also use cmpxchg. If the flag bit in the pointer to the | 460 | will also use cmpxchg. If the flag bit in the pointer to the |
461 | head page does not have the HEADER flag set, the compare will fail | 461 | head page does not have the HEADER flag set, the compare will fail |
462 | and the reader will need to look for the new head page and try again. | 462 | and the reader will need to look for the new head page and try again. |
463 | Note, the flag UPDATE and HEADER are never set at the same time. | 463 | Note, the flags UPDATE and HEADER are never set at the same time. |
464 | 464 | ||
465 | The reader swaps the reader page as follows: | 465 | The reader swaps the reader page as follows: |
466 | 466 | ||
@@ -539,7 +539,7 @@ updated to the reader page. | |||
539 | | +-----------------------------+ | | 539 | | +-----------------------------+ | |
540 | +------------------------------------+ | 540 | +------------------------------------+ |
541 | 541 | ||
542 | Another important point. The page that the reader page points back to | 542 | Another important point: The page that the reader page points back to |
543 | by its previous pointer (the one that now points to the new head page) | 543 | by its previous pointer (the one that now points to the new head page) |
544 | never points back to the reader page. That is because the reader page is | 544 | never points back to the reader page. That is because the reader page is |
545 | not part of the ring buffer. Traversing the ring buffer via the next pointers | 545 | not part of the ring buffer. Traversing the ring buffer via the next pointers |
@@ -572,7 +572,7 @@ not be able to swap the head page from the buffer, nor will it be able to | |||
572 | move the head page, until the writer is finished with the move. | 572 | move the head page, until the writer is finished with the move. |
573 | 573 | ||
574 | This eliminates any races that the reader can have on the writer. The reader | 574 | This eliminates any races that the reader can have on the writer. The reader |
575 | must spin, and this is why the reader can not preempt the writer. | 575 | must spin, and this is why the reader cannot preempt the writer. |
576 | 576 | ||
577 | tail page | 577 | tail page |
578 | | | 578 | | |
@@ -659,9 +659,9 @@ before pushing the head page. If it is, then it can be assumed that the | |||
659 | tail page wrapped the buffer, and we must drop new writes. | 659 | tail page wrapped the buffer, and we must drop new writes. |
660 | 660 | ||
661 | This is not a race condition, because the commit page can only be moved | 661 | This is not a race condition, because the commit page can only be moved |
662 | by the outter most writer (the writer that was preempted). | 662 | by the outermost writer (the writer that was preempted). |
663 | This means that the commit will not move while a writer is moving the | 663 | This means that the commit will not move while a writer is moving the |
664 | tail page. The reader can not swap the reader page if it is also being | 664 | tail page. The reader cannot swap the reader page if it is also being |
665 | used as the commit page. The reader can simply check that the commit | 665 | used as the commit page. The reader can simply check that the commit |
666 | is off the reader page. Once the commit page leaves the reader page | 666 | is off the reader page. Once the commit page leaves the reader page |
667 | it will never go back on it unless a reader does another swap with the | 667 | it will never go back on it unless a reader does another swap with the |
@@ -733,7 +733,7 @@ The write converts the head page pointer to UPDATE. | |||
733 | --->| |<---| |<---| |<---| |<--- | 733 | --->| |<---| |<---| |<---| |<--- |
734 | +---+ +---+ +---+ +---+ | 734 | +---+ +---+ +---+ +---+ |
735 | 735 | ||
736 | But if a nested writer preempts here. It will see that the next | 736 | But if a nested writer preempts here, it will see that the next |
737 | page is a head page, but it is also nested. It will detect that | 737 | page is a head page, but it is also nested. It will detect that |
738 | it is nested and will save that information. The detection is the | 738 | it is nested and will save that information. The detection is the |
739 | fact that it sees the UPDATE flag instead of a HEADER or NORMAL | 739 | fact that it sees the UPDATE flag instead of a HEADER or NORMAL |
@@ -761,7 +761,7 @@ to NORMAL. | |||
761 | --->| |<---| |<---| |<---| |<--- | 761 | --->| |<---| |<---| |<---| |<--- |
762 | +---+ +---+ +---+ +---+ | 762 | +---+ +---+ +---+ +---+ |
763 | 763 | ||
764 | After the nested writer finishes, the outer most writer will convert | 764 | After the nested writer finishes, the outermost writer will convert |
765 | the UPDATE pointer to NORMAL. | 765 | the UPDATE pointer to NORMAL. |
766 | 766 | ||
767 | 767 | ||
@@ -812,7 +812,7 @@ head page. | |||
812 | +---+ +---+ +---+ +---+ | 812 | +---+ +---+ +---+ +---+ |
813 | 813 | ||
814 | The nested writer moves the tail page forward. But does not set the old | 814 | The nested writer moves the tail page forward. But does not set the old |
815 | update page to NORMAL because it is not the outer most writer. | 815 | update page to NORMAL because it is not the outermost writer. |
816 | 816 | ||
817 | tail page | 817 | tail page |
818 | | | 818 | | |
@@ -892,7 +892,7 @@ It will return to the first writer. | |||
892 | --->| |<---| |<---| |<---| |<--- | 892 | --->| |<---| |<---| |<---| |<--- |
893 | +---+ +---+ +---+ +---+ | 893 | +---+ +---+ +---+ +---+ |
894 | 894 | ||
895 | The first writer can not know atomically test if the tail page moved | 895 | The first writer cannot know atomically if the tail page moved |
896 | while it updates the HEAD page. It will then update the head page to | 896 | while it updates the HEAD page. It will then update the head page to |
897 | what it thinks is the new head page. | 897 | what it thinks is the new head page. |
898 | 898 | ||
@@ -923,9 +923,9 @@ if the tail page is either where it use to be or on the next page: | |||
923 | --->| |<---| |<---| |<---| |<--- | 923 | --->| |<---| |<---| |<---| |<--- |
924 | +---+ +---+ +---+ +---+ | 924 | +---+ +---+ +---+ +---+ |
925 | 925 | ||
926 | If tail page != A and tail page does not equal B, then it must reset the | 926 | If tail page != A and tail page != B, then it must reset the pointer |
927 | pointer back to NORMAL. The fact that it only needs to worry about | 927 | back to NORMAL. The fact that it only needs to worry about nested |
928 | nested writers, it only needs to check this after setting the HEAD page. | 928 | writers means that it only needs to check this after setting the HEAD page. |
929 | 929 | ||
930 | 930 | ||
931 | (first writer) | 931 | (first writer) |
@@ -939,7 +939,7 @@ nested writers, it only needs to check this after setting the HEAD page. | |||
939 | +---+ +---+ +---+ +---+ | 939 | +---+ +---+ +---+ +---+ |
940 | 940 | ||
941 | Now the writer can update the head page. This is also why the head page must | 941 | Now the writer can update the head page. This is also why the head page must |
942 | remain in UPDATE and only reset by the outer most writer. This prevents | 942 | remain in UPDATE and only reset by the outermost writer. This prevents |
943 | the reader from seeing the incorrect head page. | 943 | the reader from seeing the incorrect head page. |
944 | 944 | ||
945 | 945 | ||
diff --git a/Documentation/trace/tracepoint-analysis.txt b/Documentation/trace/tracepoint-analysis.txt index 5eb4e487e667..87bee3c129ba 100644 --- a/Documentation/trace/tracepoint-analysis.txt +++ b/Documentation/trace/tracepoint-analysis.txt | |||
@@ -10,8 +10,8 @@ Tracepoints (see Documentation/trace/tracepoints.txt) can be used without | |||
10 | creating custom kernel modules to register probe functions using the event | 10 | creating custom kernel modules to register probe functions using the event |
11 | tracing infrastructure. | 11 | tracing infrastructure. |
12 | 12 | ||
13 | Simplistically, tracepoints will represent an important event that when can | 13 | Simplistically, tracepoints represent important events that can be |
14 | be taken in conjunction with other tracepoints to build a "Big Picture" of | 14 | taken in conjunction with other tracepoints to build a "Big Picture" of |
15 | what is going on within the system. There are a large number of methods for | 15 | what is going on within the system. There are a large number of methods for |
16 | gathering and interpreting these events. Lacking any current Best Practises, | 16 | gathering and interpreting these events. Lacking any current Best Practises, |
17 | this document describes some of the methods that can be used. | 17 | this document describes some of the methods that can be used. |
@@ -33,12 +33,12 @@ calling | |||
33 | 33 | ||
34 | will give a fair indication of the number of events available. | 34 | will give a fair indication of the number of events available. |
35 | 35 | ||
36 | 2.2 PCL | 36 | 2.2 PCL (Performance Counters for Linux) |
37 | ------- | 37 | ------- |
38 | 38 | ||
39 | Discovery and enumeration of all counters and events, including tracepoints | 39 | Discovery and enumeration of all counters and events, including tracepoints, |
40 | are available with the perf tool. Getting a list of available events is a | 40 | are available with the perf tool. Getting a list of available events is a |
41 | simple case of | 41 | simple case of: |
42 | 42 | ||
43 | $ perf list 2>&1 | grep Tracepoint | 43 | $ perf list 2>&1 | grep Tracepoint |
44 | ext4:ext4_free_inode [Tracepoint event] | 44 | ext4:ext4_free_inode [Tracepoint event] |
@@ -49,19 +49,19 @@ simple case of | |||
49 | [ .... remaining output snipped .... ] | 49 | [ .... remaining output snipped .... ] |
50 | 50 | ||
51 | 51 | ||
52 | 2. Enabling Events | 52 | 3. Enabling Events |
53 | ================== | 53 | ================== |
54 | 54 | ||
55 | 2.1 System-Wide Event Enabling | 55 | 3.1 System-Wide Event Enabling |
56 | ------------------------------ | 56 | ------------------------------ |
57 | 57 | ||
58 | See Documentation/trace/events.txt for a proper description on how events | 58 | See Documentation/trace/events.txt for a proper description on how events |
59 | can be enabled system-wide. A short example of enabling all events related | 59 | can be enabled system-wide. A short example of enabling all events related |
60 | to page allocation would look something like | 60 | to page allocation would look something like: |
61 | 61 | ||
62 | $ for i in `find /sys/kernel/debug/tracing/events -name "enable" | grep mm_`; do echo 1 > $i; done | 62 | $ for i in `find /sys/kernel/debug/tracing/events -name "enable" | grep mm_`; do echo 1 > $i; done |
63 | 63 | ||
64 | 2.2 System-Wide Event Enabling with SystemTap | 64 | 3.2 System-Wide Event Enabling with SystemTap |
65 | --------------------------------------------- | 65 | --------------------------------------------- |
66 | 66 | ||
67 | In SystemTap, tracepoints are accessible using the kernel.trace() function | 67 | In SystemTap, tracepoints are accessible using the kernel.trace() function |
@@ -86,7 +86,7 @@ were allocating the pages. | |||
86 | print_count() | 86 | print_count() |
87 | } | 87 | } |
88 | 88 | ||
89 | 2.3 System-Wide Event Enabling with PCL | 89 | 3.3 System-Wide Event Enabling with PCL |
90 | --------------------------------------- | 90 | --------------------------------------- |
91 | 91 | ||
92 | By specifying the -a switch and analysing sleep, the system-wide events | 92 | By specifying the -a switch and analysing sleep, the system-wide events |
@@ -107,16 +107,16 @@ for a duration of time can be examined. | |||
107 | Similarly, one could execute a shell and exit it as desired to get a report | 107 | Similarly, one could execute a shell and exit it as desired to get a report |
108 | at that point. | 108 | at that point. |
109 | 109 | ||
110 | 2.4 Local Event Enabling | 110 | 3.4 Local Event Enabling |
111 | ------------------------ | 111 | ------------------------ |
112 | 112 | ||
113 | Documentation/trace/ftrace.txt describes how to enable events on a per-thread | 113 | Documentation/trace/ftrace.txt describes how to enable events on a per-thread |
114 | basis using set_ftrace_pid. | 114 | basis using set_ftrace_pid. |
115 | 115 | ||
116 | 2.5 Local Event Enablement with PCL | 116 | 3.5 Local Event Enablement with PCL |
117 | ----------------------------------- | 117 | ----------------------------------- |
118 | 118 | ||
119 | Events can be activate and tracked for the duration of a process on a local | 119 | Events can be activated and tracked for the duration of a process on a local |
120 | basis using PCL such as follows. | 120 | basis using PCL such as follows. |
121 | 121 | ||
122 | $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ | 122 | $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ |
@@ -131,18 +131,18 @@ basis using PCL such as follows. | |||
131 | 131 | ||
132 | 0.973913387 seconds time elapsed | 132 | 0.973913387 seconds time elapsed |
133 | 133 | ||
134 | 3. Event Filtering | 134 | 4. Event Filtering |
135 | ================== | 135 | ================== |
136 | 136 | ||
137 | Documentation/trace/ftrace.txt covers in-depth how to filter events in | 137 | Documentation/trace/ftrace.txt covers in-depth how to filter events in |
138 | ftrace. Obviously using grep and awk of trace_pipe is an option as well | 138 | ftrace. Obviously using grep and awk of trace_pipe is an option as well |
139 | as any script reading trace_pipe. | 139 | as any script reading trace_pipe. |
140 | 140 | ||
141 | 4. Analysing Event Variances with PCL | 141 | 5. Analysing Event Variances with PCL |
142 | ===================================== | 142 | ===================================== |
143 | 143 | ||
144 | Any workload can exhibit variances between runs and it can be important | 144 | Any workload can exhibit variances between runs and it can be important |
145 | to know what the standard deviation in. By and large, this is left to the | 145 | to know what the standard deviation is. By and large, this is left to the |
146 | performance analyst to do it by hand. In the event that the discrete event | 146 | performance analyst to do it by hand. In the event that the discrete event |
147 | occurrences are useful to the performance analyst, then perf can be used. | 147 | occurrences are useful to the performance analyst, then perf can be used. |
148 | 148 | ||
@@ -166,7 +166,7 @@ In the event that some higher-level event is required that depends on some | |||
166 | aggregation of discrete events, then a script would need to be developed. | 166 | aggregation of discrete events, then a script would need to be developed. |
167 | 167 | ||
168 | Using --repeat, it is also possible to view how events are fluctuating over | 168 | Using --repeat, it is also possible to view how events are fluctuating over |
169 | time on a system wide basis using -a and sleep. | 169 | time on a system-wide basis using -a and sleep. |
170 | 170 | ||
171 | $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ | 171 | $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ |
172 | -e kmem:mm_pagevec_free \ | 172 | -e kmem:mm_pagevec_free \ |
@@ -180,7 +180,7 @@ time on a system wide basis using -a and sleep. | |||
180 | 180 | ||
181 | 1.002251757 seconds time elapsed ( +- 0.005% ) | 181 | 1.002251757 seconds time elapsed ( +- 0.005% ) |
182 | 182 | ||
183 | 5. Higher-Level Analysis with Helper Scripts | 183 | 6. Higher-Level Analysis with Helper Scripts |
184 | ============================================ | 184 | ============================================ |
185 | 185 | ||
186 | When events are enabled the events that are triggering can be read from | 186 | When events are enabled the events that are triggering can be read from |
@@ -190,11 +190,11 @@ be gathered on-line as appropriate. Examples of post-processing might include | |||
190 | 190 | ||
191 | o Reading information from /proc for the PID that triggered the event | 191 | o Reading information from /proc for the PID that triggered the event |
192 | o Deriving a higher-level event from a series of lower-level events. | 192 | o Deriving a higher-level event from a series of lower-level events. |
193 | o Calculate latencies between two events | 193 | o Calculating latencies between two events |
194 | 194 | ||
195 | Documentation/trace/postprocess/trace-pagealloc-postprocess.pl is an example | 195 | Documentation/trace/postprocess/trace-pagealloc-postprocess.pl is an example |
196 | script that can read trace_pipe from STDIN or a copy of a trace. When used | 196 | script that can read trace_pipe from STDIN or a copy of a trace. When used |
197 | on-line, it can be interrupted once to generate a report without existing | 197 | on-line, it can be interrupted once to generate a report without exiting |
198 | and twice to exit. | 198 | and twice to exit. |
199 | 199 | ||
200 | Simplistically, the script just reads STDIN and counts up events but it | 200 | Simplistically, the script just reads STDIN and counts up events but it |
@@ -212,12 +212,12 @@ also can do more such as | |||
212 | processes, the parent process responsible for creating all the helpers | 212 | processes, the parent process responsible for creating all the helpers |
213 | can be identified | 213 | can be identified |
214 | 214 | ||
215 | 6. Lower-Level Analysis with PCL | 215 | 7. Lower-Level Analysis with PCL |
216 | ================================ | 216 | ================================ |
217 | 217 | ||
218 | There may also be a requirement to identify what functions with a program | 218 | There may also be a requirement to identify what functions within a program |
219 | were generating events within the kernel. To begin this sort of analysis, the | 219 | were generating events within the kernel. To begin this sort of analysis, the |
220 | data must be recorded. At the time of writing, this required root | 220 | data must be recorded. At the time of writing, this required root: |
221 | 221 | ||
222 | $ perf record -c 1 \ | 222 | $ perf record -c 1 \ |
223 | -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ | 223 | -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ |
@@ -253,11 +253,11 @@ perf report. | |||
253 | # (For more details, try: perf report --sort comm,dso,symbol) | 253 | # (For more details, try: perf report --sort comm,dso,symbol) |
254 | # | 254 | # |
255 | 255 | ||
256 | According to this, the vast majority of events occured triggered on events | 256 | According to this, the vast majority of events triggered on events |
257 | within the VDSO. With simple binaries, this will often be the case so lets | 257 | within the VDSO. With simple binaries, this will often be the case so let's |
258 | take a slightly different example. In the course of writing this, it was | 258 | take a slightly different example. In the course of writing this, it was |
259 | noticed that X was generating an insane amount of page allocations so lets look | 259 | noticed that X was generating an insane amount of page allocations so let's look |
260 | at it | 260 | at it: |
261 | 261 | ||
262 | $ perf record -c 1 -f \ | 262 | $ perf record -c 1 -f \ |
263 | -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ | 263 | -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \ |
@@ -280,8 +280,8 @@ This was interrupted after a few seconds and | |||
280 | # (For more details, try: perf report --sort comm,dso,symbol) | 280 | # (For more details, try: perf report --sort comm,dso,symbol) |
281 | # | 281 | # |
282 | 282 | ||
283 | So, almost half of the events are occuring in a library. To get an idea which | 283 | So, almost half of the events are occurring in a library. To get an idea which |
284 | symbol. | 284 | symbol: |
285 | 285 | ||
286 | $ perf report --sort comm,dso,symbol | 286 | $ perf report --sort comm,dso,symbol |
287 | # Samples: 27666 | 287 | # Samples: 27666 |
@@ -297,7 +297,7 @@ symbol. | |||
297 | 0.01% Xorg /opt/gfx-test/lib/libpixman-1.so.0.13.1 [.] get_fast_path | 297 | 0.01% Xorg /opt/gfx-test/lib/libpixman-1.so.0.13.1 [.] get_fast_path |
298 | 0.00% Xorg [kernel] [k] ftrace_trace_userstack | 298 | 0.00% Xorg [kernel] [k] ftrace_trace_userstack |
299 | 299 | ||
300 | To see where within the function pixmanFillsse2 things are going wrong | 300 | To see where within the function pixmanFillsse2 things are going wrong: |
301 | 301 | ||
302 | $ perf annotate pixmanFillsse2 | 302 | $ perf annotate pixmanFillsse2 |
303 | [ ... ] | 303 | [ ... ] |
diff --git a/Documentation/vgaarbiter.txt b/Documentation/vgaarbiter.txt index 987f9b0a5ece..43a9b0694fdd 100644 --- a/Documentation/vgaarbiter.txt +++ b/Documentation/vgaarbiter.txt | |||
@@ -103,7 +103,7 @@ I.2 libpciaccess | |||
103 | ---------------- | 103 | ---------------- |
104 | 104 | ||
105 | To use the vga arbiter char device it was implemented an API inside the | 105 | To use the vga arbiter char device it was implemented an API inside the |
106 | libpciaccess library. One fieldd was added to struct pci_device (each device | 106 | libpciaccess library. One field was added to struct pci_device (each device |
107 | on the system): | 107 | on the system): |
108 | 108 | ||
109 | /* the type of resource decoded by the device */ | 109 | /* the type of resource decoded by the device */ |