aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation
Commit message (Collapse)AuthorAge
* kobject: update documentationCornelia Huck2007-07-30
| | | | | | | | | | | | | | Update kobject documentation: - Update structure definitions. - Remove documentation of removed struct subsystem. (First shot, uevent_ops probably need some documentation as well.) Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* stable_api_nonsense.txt: Disambiguate the use of "this" by using "that" to ↵Juan Lang2007-07-30
| | | | | | | refer to the syscall interface Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Fix Doc/sysfs-rules typosRandy Dunlap2007-07-30
| | | | | | | | | Fix typos only (spelling, grammar, duplicate words, etc.). Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Kay Sievers <kay.sievers@vrfy.org Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* HOWTO: sync Japanese HOWTOTsugikazu Shibata2007-07-30
| | | | | | Signed-off-by: Tsugikazu Shibata <tshibata@ab.jp.nec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* HOWTO: adjust translation header of Japanese stable_api_nonsense.txtIKEDA, Munehiro2007-07-30
| | | | | | Signed-off-by: IKEDA, Munehiro <m-ikeda@ds.jp.nec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds2007-07-28
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] Fix sclp_vt220 error handling. [S390] cio: Reorganize initialization. [S390] cio: Make CIO_* macros safe if dbfs are not available. [S390] cio: Clean up messages. [S390] Fix IRQ tracing. [S390] vmur: fix diag14_read. [S390] Wire up sys_fallocate. [S390] add types.h include to s390_ext.h [S390] cio: Remove deprecated rdc/rcd. [S390] Get rid of new section mismatch warnings. [S390] sclp: kill unused SCLP config option. [S390] cio: Remove remains of _ccw_device_get_device_number(). [S390] cio: css_sch_device_register() can be made static. [S390] Improve __smp_call_function_map. [S390] Convert to smp_call_function_single.
| * [S390] cio: Remove deprecated rdc/rcd.Cornelia Huck2007-07-27
| | | | | | | | | | | | | | | | http://marc.info/?l=linux-kernel&m=118481061928246&w=2 seems to indicate disfavour of "deprecated", so let's just kill it now. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2007-07-28
|\ \ | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/linux-2.6-block: docbook: add pipes, other fixes blktrace: use cpu_clock() instead of sched_clock() bsg: Fix build for CONFIG_BLOCK=n [patch] QUEUE_FLAG_READFULL QUEUE_FLAG_WRITEFULL comment fix
| * | docbook: add pipes, other fixesRandy Dunlap2007-07-27
| |/ | | | | | | | | | | | | | | Fix some typos in pipe.c and splice.c. Add pipes API to kernel-api.tmpl. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* / AGP: document boot optionsChuck Ebbert2007-07-26
|/ | | | | | | Add documentation for AGP boot options. Signed-off-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-schedLinus Torvalds2007-07-26
|\ | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: [PATCH] sched: debug feature - make the sched-domains tree runtime-tweakable [PATCH] sched: add above_background_load() function [PATCH] sched: update Documentation/sched-stats.txt [PATCH] sched: mark sysrq_sched_debug_show() static [PATCH] sched: make cpu_clock() not use the rq clock [PATCH] sched: remove unused rq->load_balance_class [PATCH] sched: arch preempt notifier mechanism [PATCH] sched: increase SCHED_LOAD_SCALE_FUZZ
| * [PATCH] sched: update Documentation/sched-stats.txtJoachim Deguara2007-07-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While learning about schedstats I found that the documentation in the tree is old. I updated it and found some interesting stuff like schedstats version 14 is the same as version and version 13 never saw a kernel release! Also there are 6 fields in the current schedstats that are not used anymore. Nick had made them irrelevant in commit 476d139c218e44e045e4bc6d4cc02b010b343939 but never removed them. Thanks to Rick's perl script who I borrowed some of the updated descriptions from. Signed-off-by: Joachim Deguara <joachim.deguara@amd.com> Acked-by: Nick Piggin <npiggin@suse.de> Cc: Rick Lindsley <ricklind@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | lguest: documentation VII: FIXMEsRusty Russell2007-07-26
| | | | | | | | | | | | | | | | Documentation: The FIXMEs Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lguest: documentation IV: LauncherRusty Russell2007-07-26
| | | | | | | | | | | | | | | | Documentation: The Launcher Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lguest: documentation I: PreparationRusty Russell2007-07-26
|/ | | | | | | | | | | The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'request-queue-t' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2007-07-24
|\ | | | | | | | | | | * 'request-queue-t' of git://git.kernel.dk/linux-2.6-block: [BLOCK] Add request_queue_t and mark it deprecated [BLOCK] Get rid of request_queue_t typedef
| * [BLOCK] Get rid of request_queue_t typedefJens Axboe2007-07-24
| | | | | | | | | | | | | | | | | | Some of the code has been gradually transitioned to using the proper struct request_queue, but there's lots left. So do a full sweet of the kernel and get rid of this typedef and replace its uses with the proper type. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | minor gpio doc updateDavid Brownell2007-07-24
| | | | | | | | | | | | | | | | | | | | Fix doc bug noted by Uwe Kleine-König: gpio_set_direction() is long gone, replaced by gpio_direction_input() and gpio_direction_output(). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: <ukleinek@informatik.uni-freiburg.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | link lguest example launcher non-staticRusty Russell2007-07-24
|/ | | | | | | | | | | | | | S.Caglar Onur points out that many distributions don't ship a static zlib. Unfortunately the launcher currently maps virtual device memory where shared libraries want to go. The solution is to pre-scan the args to figure out how much memory we have, then allocate devices above that, rather than down from the top possible address. This also turns out to be simpler. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation: Fix a mispelt "probably" in SubmittingPatches.Linus Nilsson2007-07-22
| | | | | | | Fix a typo in SubmittingPatches where "probably" was spelt "probabally". Signed-off-by: Linus Nilsson <lajnold@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* DocBook: Change a headline in kernel-locking to list all three main types of ↵Linus Nilsson2007-07-22
| | | | | | | | | | locking. Change a headline to reflect that there are three main types of kernel locking, not two. Signed-off-by: Linus Nilsson <lajnold@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2007-07-22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (60 commits) [SCSI] libsas: make ATA functions selectable by a config option [SCSI] bsg: unexport sg v3 helper functions [SCSI] bsg: fix bsg_unregister_queue [SCSI] bsg: make class backlinks [SCSI] 3w-9xxx: add support for 9690SA [SCSI] bsg: fix bsg_register_queue error path [SCSI] ESP: Increase ESP_BUS_TIMEOUT to 275. [SCSI] libsas: fix scr_read/write users and update the libata documentation [SCSI] mpt fusion: update Kconfig help [SCSI] scsi_transport_sas: add destructor for bsg [SCSI] iscsi_tcp: buggered kmalloc() [SCSI] qla2xxx: Update version number to 8.02.00-k2. [SCSI] qla2xxx: Add ISP25XX support. [SCSI] qla2xxx: Use pci_try_set_mwi(). [SCSI] qla2xxx: Use PCI-X/PCI-Express read control interfaces. [SCSI] qla2xxx: Re-factor isp_operations to static structures. [SCSI] qla2xxx: Validate mid-layer 'underflow' during check-condition handling. [SCSI] qla2xxx: Correct setting of 'current' and 'supported' speeds during FDMI registration. [SCSI] qla2xxx: Generalize iIDMA support. [SCSI] qla2xxx: Generalize FW-Interface-2 support. ...
| * [SCSI] libsas: fix scr_read/write users and update the libata documentationJames Bottomley2007-07-20
| | | | | | | | | | | | | | | | This fixes up the usage in libsas (which are easy to miss, since they're only in the scsi-misc tree) ... and also corrects the documentation on the point of what these two function pointers actually return. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | Pull thinkpad into release branchLen Brown2007-07-22
|\ \
| * | ACPI: thinkpad-acpi: bump up version to 0.15Henrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | Name it thinkpad-acpi version 0.15. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: make EC-based thermal readings non-experimentalHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | Reading the 16 thermal sensors directly from the EC has been stable for about one year, in all supported ThinkPad models. Remove its "experimental" label. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: react to Lenovo ThinkPad differences in hot keyHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lenovo ThinkPads have a slightly different key map layout from IBM ThinkPads (fn+f2 and fn+f3 are swapped). Knowing which one we are dealing with, we can properly set a few more hot keys up by default. Also, export the correct vendor in the input device, as that information might be useful to userspace. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: allow use of CMOS NVRAM for brightness controlHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It appears that Lenovo decided to break the EC brightness control interface in a weird way in their latest BIOSes. Fortunately, the old CMOS NVRAM interface works just fine in such BIOSes. Add a module parameter that allows the user to select which strategy to use for brightness control: EC, NVRAM, or both. By default, do both (which is the way thinkpad-acpi used to work until now) on IBM ThinkPads, and use NVRAM only on Lenovo ThinkPads. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: checkpoint sysfs interface version due to input layerHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | The change in the way hotkey events are handled by default, and the use of the input layer for the hotkey events are important enough features to warrant increasing the major field of the sysfs interface version. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: make the input event mode the defaultHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the input layer the default way to deal with thinkpad-acpi hot keys, but add a kernel config option to retain the old way of doing things. This means we map a lot more keys to useful stuff by default, and also that we enable hot key handling by default on driver load (like Windows does). The documentation for proper use of this resource is also updated. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Richard Hughes <hughsient@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: add input device support to hotkey subdriverHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add input device support to the hotkey subdriver. Hot keys that have a valid keycode mapping are reported through the input layer if the input device is open. Otherwise, they will be reported as ACPI events, as they were before. Scan codes are reported (using EV_MSC MSC_SCAN events) along with EV_KEY KEY_UNKNOWN events. For backwards compatibility purposes, hot keys that used to be reported through ACPI events are not mapped to anything meaningful by default. Userspace is supposed to remap them if it wants to use the input device for hot key reporting. This patch is based on a patch by Richard Hughes <hughsient@gmail.com>. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Richard Hughes <hughsient@gmail.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: update CMOS commands documentationHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | The CMOS set of commands is often just used to keep the CMOS NVRAM in sync with whatever the ACPI BIOS has been doing in modern ThinkPads. In older ThinkPads, it actually carried out real actions. Document this. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: checkpoint sysfs interface version due to hotkeyHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The change in the size of the hotkey mask, the hability to report the keys that use the higher bits, and the addition of the hotkey_radio_sw attribute are important enough features to warrant increasing the minor field of the sysfs interface version. Also, document a bit better how and when the thinkpad-acpi sysfs interface version will be updated. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: export to sysfs the state of the radio slider switchHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some ThinkPad models, notably the T60 and X60, have a slider switch to enable and disable the radios. The switch has the capability of force-disabling the radios in hardware on most models, and it is supposed to affect all radios (WLAN, WWAN, BlueTooth). Export the switch state as a sysfs attribute, on ThinkPads where it is available. Thanks to Henning Schild for asking for this feature, and for tracking down the EC register that holds the radio switch state. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Henning Schild <henning@wh9.tu-dresden.de> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: export hotkey maximum masksHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The firmware knows how many hot keys it supports, so export this information in a sysfs attribute. And the driver knows which keys are always handled by the firmware in all known ThinkPad models too, so export this information as well in a sysfs attribute. Unless you know which events need to be handled in a passive way, do *not* enable hotkeys that are always handled by the firmware. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: enable more hotkeysHenrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Revise ACPI HKEY functionality to better interface with the firmware, and enable up to 32 regular hotkeys, instead of just 16 of them. Ouch. This takes care of most keys one used to have to do CMOS NVRAM polling on, and should drop the need for tpb, thinkpad-keys, and other such 5Hz NVRAM polling power vampires on most modern ThinkPads ;-) And, just to add insult to injury, this was sort of working since forever through the procfs interface, but nobody noticed or tried an echo 0xffffffff > /proc/acpi/ibm/hotkey and told me it would generate weird events. ARGH! Thanks to Richard Hughes for kicking off the work that ended up with this discovery, and to Matthew Garret for calling my attention to the fact that newer ThinkPads were indeed generating ACPI GPEs when such hot keys were pressed. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Richard Hughes <hughsient@gmail.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: thinkpad-acpi: update information on T43 thermal sensor 0xc1Henrique de Moraes Holschuh2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | Update the documentation with some extra data on the T43 thermal sensor @0xc1, thanks to Alexey Fisher. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
* | | Pull misc into release branchLen Brown2007-07-22
|\ \ \ | |/ / |/| | | | | | | | | | | Conflicts: Documentation/feature-removal-schedule.txt
| * | ACPI: update ACPI proc I/F removal scheduleZhang Rui2007-07-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ACPI sysfs conversion is not finished yet and some user space tools still depend on the ACPI proc I/F. We plan to finish all the sysfs conversion by January 2008 and remove the ACPI proc I/F in July 2008. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: update feature-removal-schedule.txt, /sys/firmware/acpi/namespace is goneZhang Rui2007-07-22
| | | | | | | | | | | | | | | | | | | | | The /sys/firmware/acpi/namespace has already been removed in 2.6.21. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | ACPI: delete cmdline documentation for deleted hotkey codeStephen Hemminger2007-07-03
| | | | | | | | | | | | | | | | | | | | | | | | This looks like left over text in the kernel parameters documentation. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
* | | x86_64: mcelog tolerant level cleanupTim Hockin2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Background: The MCE handler has several paths that it can take, depending on various conditions of the MCE status and the value of the 'tolerant' knob. The exact semantics are not well defined and the code is a bit twisty. Description: This patch makes the MCE handler's behavior more clear by documenting the behavior for various 'tolerant' levels. It also fixes or enhances several small things in the handler. Specifically: * If RIPV is set it is not safe to restart, so set the 'no way out' flag rather than the 'kill it' flag. * Don't panic() on correctable MCEs. * If the _OVER bit is set *and* the _UC bit is set (meaning possibly dropped uncorrected errors), set the 'no way out' flag. * Use EIPV for testing whether an app can be killed (SIGBUS) rather than RIPV. According to docs, EIPV indicates that the error is related to the IP, while RIPV simply means the IP is valid to restart from. * Don't clear the MCi_STATUS registers until after the panic() path. This leaves the status bits set after the panic() so clever BIOSes can find them (and dumb BIOSes can do nothing). This patch also calls nonseekable_open() in mce_open (as suggested by akpm). Result: Tolerant levels behave almost identically to how they always have, but not it's well defined. There's a slightly higher chance of panic()ing when multiple errors happen (a good thing, IMHO). If you take an MBE and panic(), the error status bits are not cleared. Alternatives: None. Testing: I used software to inject correctable and uncorrectable errors. With tolerant = 3, the system usually survives. With tolerant = 2, the system usually panic()s (PCC) but not always. With tolerant = 1, the system always panic()s. When the system panic()s, the BIOS is able to detect that the cause of death was an MC4. I was not able to reproduce the case of a non-PCC error in userspace, with EIPV, with (tolerant < 3). That will be rare at best. Signed-off-by: Tim Hockin <thockin@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | x86_64: remove unused variable maxcpusJan Beulich2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | .. and adjust documentation to properly reflect options that are x86-64 specific. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpuAndi Kleen2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements new vDSO for x86-64. The concept is similar to the existing vDSOs on i386 and PPC. x86-64 has had static vsyscalls before, but these are not flexible enough anymore. A vDSO is a ELF shared library supplied by the kernel that is mapped into user address space. The vDSO mapping is randomized for each process for security reasons. Doing this was needed for clock_gettime, because clock_gettime always needs a syscall fallback and having one at a fixed address would have made buffer overflow exploits too easy to write. The vdso can be disabled with vdso=0 It currently includes a new gettimeofday implemention and optimized clock_gettime(). The gettimeofday implementation is slightly faster than the one in the old vsyscall. clock_gettime is significantly faster than the syscall for CLOCK_MONOTONIC and CLOCK_REALTIME. The new calls are generally faster than the old vsyscall. Advantages over the old x86-64 vsyscalls: - Extensible - Randomized - Cleaner - Easier to virtualize (the old static address range previously causes overhead e.g. for Xen because it has to create special page tables for it) Weak points: - glibc support still to be written The VM interface is partly based on Ingo Molnar's i386 version. Includes compile fix from Joachim Deguara Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Documentation:reference notifiers.txt in freezing-of-tasks.txtOliver Neukum2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | freezing-of-tasks.txt mentions firmware issues without mentioning the use of the new notifier API to overcome them. Here's an update. Signed-off-by: Oliver Neukum <oneukum@suse.de> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'release' of ↵Linus Torvalds2007-07-20
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Prevent people from directly including <asm/rwsem.h>. [IA64] remove time interpolator [IA64] Convert to generic timekeeping/clocksource [IA64] refresh some config files for 64K pagesize [IA64] Delete iosapic_free_rte() [IA64] fallocate system call [IA64] Enable percpu vector domain for IA64_DIG [IA64] Enable percpu vector domain for IA64_GENERIC [IA64] Support irq migration across domain [IA64] Add support for vector domain [IA64] Add mapping table between irq and vector [IA64] Check if irq is sharable [IA64] Fix invalid irq vector assumption for iosapic [IA64] Use dynamic irq for iosapic interrupts [IA64] Use per iosapic lock for indirect iosapic register access [IA64] Cleanup lock order in iosapic_register_intr [IA64] Remove duplicated members in iosapic_rte_info [IA64] Remove block structure for locking in iosapic.c
| * \ \ Pull ia64-clocksource into release branchTony Luck2007-07-20
| |\ \ \
| | * | | [IA64] remove time interpolatorBob Picco2007-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove time_interpolator code (This is generic code, but only user was ia64. It has been superseded by the CONFIG_GENERIC_TIME code). Signed-off-by: Bob Picco <bob.picco@hp.com> Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Peter Keilty <peter.keilty@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * | | [IA64] Convert to generic timekeeping/clocksourceTony Luck2007-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a merge of Peter Keilty's initial patch (which was revived by Bob Picco) for this with Hidetoshi Seto's fixes and scaling improvements. Acked-by: Bob Picco <bob.picco@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | | Pull vector-domain into release branchTony Luck2007-07-19
| |\ \ \ \
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-13 21:33:43 -0500