Commit graph android_kernel_sony_sdm845/Documentation
Message SHA1
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (74 commits)
  fix do_sys_open() prototype
  sysfs: trivial: fix sysfs_create_file kerneldoc spelling mistake
  Documentation: Fix typo in SubmitChecklist.
  Typo: depricated -> deprecated
  Add missing profile=kvm option to Documentation/kernel-parameters.txt
  fix typo about TBI in e1000 comment
  proc.txt: Add /proc/stat field
  small documentation fixes
  Fix compiler warning in smount example program from sharedsubtree.txt
  docs/sysfs: add missing word to sysfs attribute explanation
  documentation/ext3: grammar fixes
  Documentation/java.txt: typo and grammar fixes
  Documentation/filesystems/vfs.txt: typo fix
  include/asm-*/system.h: remove unused set_rmb(), set_wmb() macros
  trivial copy_data_pages() tidy up
  Fix typo in arch/x86/kernel/tsc_32.c
  file link fix for Pegasus USB net driver help
  remove unused return within void return function
  Typo fixes retrun -> return
  x86 hpet.h: remove broken links
  ...

Linus Torvalds   commited 2007-10-19 20:36:17 -07:00
c00046c279
Documentation: Fix typo in SubmitChecklist.
Signed-off-by: James Bowes <jbowes@dangerouslyinc.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

James Bowes   authored and   Adrian Bunk   commited 2007-10-20 03:13:09 +02:00
80abe55b53
Add missing profile=kvm option to Documentation/kernel-parameters.txt
Whilst looking up what profile=sleep did, I noticed that we missed
adding docs for the most recent addition to the profiler.

Signed-off-by: Dave Jones <davej@redhat.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Dave Jones   authored and   Adrian Bunk   commited 2007-10-20 03:08:22 +02:00
c0fe2e6964
proc.txt: Add /proc/stat field
This patch updates the "cat /proc/stat" output found
in Documentation/filesystems/proc.txt.

Signed-off-by: Adrian Bunk <bunk@kernel.org>

Leonardo Chiquitto   authored and   Adrian Bunk   commited 2007-10-20 03:03:38 +02:00
b68f2c3a98
dm: uevent generate events
This patch adds support for the dm_path_event dm_send_event functions which
create and send udev events.

Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Mike Anderson   authored and   Alasdair G Kergon   commited 2007-10-20 02:01:26 +01:00
7a8c3d3b92
Fix compiler warning in smount example program from sharedsubtree.txt
If one compiles the example smount program, found in
Documentation/sharedsubtree.txt, with -Wall then there's a small
compiler warning rearing its ugly head :

 smount.c: In function 'main':
 smount.c:45: warning: implicit declaration of function 'strcmp'

Easily fixed by just including string.h

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Jesper Juhl   authored and   Adrian Bunk   commited 2007-10-20 02:44:34 +02:00
2de206d8f0
docs/sysfs: add missing word to sysfs attribute explanation
Add the obvious missing word.

Signed-off-by: Shaun Zinck <shaun.zinck@gmail.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Shaun Zinck   authored and   Adrian Bunk   commited 2007-10-20 02:39:43 +02:00
f8c34f9816
documentation/ext3: grammar fixes
Fix some grammar in the explanation of the Journal Block Device layer.

Signed-off-by: Shaun Zinck <shaun.zinck@gmail.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Shaun Zinck   authored and   Adrian Bunk   commited 2007-10-20 02:38:36 +02:00
7356337bd2
Documentation/java.txt: typo and grammar fixes
This fixes a typo and rearranges the sentence to make more sense.

Signed-off-by: Shaun Zinck <shaun.zinck@gmail.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Shaun Zinck   authored and   Adrian Bunk   commited 2007-10-20 02:37:21 +02:00
59dd24d32c
Documentation/filesystems/vfs.txt: typo fix
Signed-off-by: Shaun Zinck <shaun.zinck@gmail.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Shaun Zinck   authored and   Adrian Bunk   commited 2007-10-20 02:35:36 +02:00
bc5b1d55cc
Typo fixes retrun -> return
Typo fixes retrun -> return

Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Gabriel Craciunescu   authored and   Adrian Bunk   commited 2007-10-20 02:13:26 +02:00
e9534b3fd7
Update 2.4 maintainer in document
Update the maintainer of 2.4 kernel in Documentations/SubmittingPatches.

Signed-off-by: Li Yang <leo@zh-kernel.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Li Yang   authored and   Adrian Bunk   commited 2007-10-20 02:02:12 +02:00
507a6a8c9b
Documentation/filesystems/files.txt: remove rcuref_inc_lf() reverences
rcuref_inc_lf() is not used anymore. Replace it by atomic_inc_not_zero()

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Eric Dumazet   authored and   Adrian Bunk   commited 2007-10-20 01:47:49 +02:00
94547426db
typo fixes
Most of these fixes were already submitted for old kernel versions, and were
approved, but for some reason they never made it into the releases.

Because this is a consolidation of a couple old missed patches, it touches both
Kconfigs and documentation texts.

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Matt LaPlante   authored and   Adrian Bunk   commited 2007-10-20 01:34:40 +02:00
01dd2fbf0d
spelling fixes: Documentation/
Spelling fixes in Documentation/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Simon Arlott   authored and   Adrian Bunk   commited 2007-10-20 01:30:25 +02:00
0f035b8e84
changed email
Changed email address of Johann Deneux (myself)
Also removed CVS tags in comments (no longer using cvs)

Signed-off-by: Johann Deneux <johann.deneux@gmail.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Johann Deneux   authored and   Adrian Bunk   commited 2007-10-20 00:47:32 +02:00
118e78d1cd
Documentation: Remove unreferenced "blkmtd_*" parms
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-20 00:22:16 +02:00
698524d78d
Documentation: Add nested versions of mutex locks to docs
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-20 00:15:26 +02:00
343b901980
Documentation: Remove reference to non-existent "unwind_debug" kernel parm
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-20 00:12:55 +02:00
cfd348fd6e
Documentation: Fix erroneous "dmascc=" documentation
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-20 00:11:36 +02:00
646b1c9dad
Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86
* ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86: (33 commits)
  x86: convert cpuinfo_x86 array to a per_cpu array
  x86: introduce frame_pointer() and stack_pointer()
  x86 & generic: change to __builtin_prefetch()
  i386: do not BUG_ON() when MSR is unknown
  x86: acpi use cpu_physical_id
  x86: convert cpu_llc_id to be a per cpu variable
  x86: convert cpu_to_apicid to be a per cpu variable
  i386: introduce "used_vectors" bitmap which can be used to reserve vectors.
  x86: use raw locks during oopses
  x86: honor _PAGE_PSE bit on page walks
  i386: do cpuid_device_create() in CPU_UP_PREPARE instead of CPU_ONLINE.
  x86: implement missing x86_64 function smp_call_function_mask()
  x86: use descriptor's functions instead of inline assembly
  i386: consolidate show_regs and show_registers for i386
  i386: make callgraph use dump_trace() on i386/x86_64
  x86: enable iommu_merge by default
  i386: i386 add AMD64 Barcelona PMU MSR definitions to msr.h
  x86: Unify i386 and x86-64 early quirks
  x86: enable HPET on ICH3 and ICH4
  x86: force enable HPET on VT8235/8237 chipsets
  ...

Manually fix trivial conflict with task pid container helper changes in
arch/x86/kernel/process_32.c

Linus Torvalds   commited 2007-10-19 15:06:00 -07:00
60812a4a99
Documentation: Remove references to dead "eda" and "edb" kernel parms
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-20 00:03:32 +02:00
30afddadac
Documentation: Remove references to dead "cyclades=" boot option
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-20 00:01:12 +02:00
23d028f69a
Documentation: Remove reference to non-existent "applicom" kernel parm
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:47:50 +02:00
02a72fd675
Documentation: Remove references to dead "noasync" kernel parm
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:33:35 +02:00
ac0bf14df7
Documentation: Remove reference to dead "lasi" kernel parm
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:32:16 +02:00
634fe2fdbf
Documentation: Delete final reference to "sg_def_reserved_size" kernel parm
given the following:

$ grep -rw sg_def_reserved_size *
Documentation/kernel-parameters.txt:    sg_def_reserved_size=   [SCSI]
$

that kernel parameter looks exceedingly dead.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:28:40 +02:00
cd1c34f21f
Documentation: Remove remaining useless reference to acpi_fake_ecdt
>From commit cd8c93a4e0:

"Similar functionality was turned on by acpi_fake_ecdt=1 command line
before. Now it is on all the time."

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:27:18 +02:00
bd9fcb44a7
more UTF-8 conversions
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Marcin Garski   authored and   Adrian Bunk   commited 2007-10-19 23:22:11 +02:00
db955170d4
Convert files to UTF-8 and some cleanups
* Convert files to UTF-8.

  * Also correct some people's names
    (one example is Eißfeldt, which was found in a source file.
    Given that the author used an ß at all in a source file
    indicates that the real name has in fact a 'ß' and not an 'ss',
    which is commonly used as a substitute for 'ß' when limited to
    7bit.)

  * Correct town names (Goettingen -> Göttingen)

  * Update Eberhard Mönkeberg's address (http://lkml.org/lkml/2007/1/8/313)

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Jan Engelhardt   authored and   Adrian Bunk   commited 2007-10-19 23:21:04 +02:00
96de0e252c
Documentation: Delete dead OSS-related kernel parameter.
Since the OSS-related "sb" kernel parameter doesn't seem to be
supported, drop its reference from the kernel-parameters.txt file.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:15:26 +02:00
3f5b98a2a0
Documentation: Drop reference to dead "eicon" kernel paramter.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Armin Schindler <armin@melware.de>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:14:24 +02:00
9f5e0bffe5
Fix misspellings of "system", "controller", "interrupt" and "necessary".
Fix the various misspellings of "system", controller", "interrupt" and
"[un]necessary".

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>

Robert P. J. Day   authored and   Adrian Bunk   commited 2007-10-19 23:10:43 +02:00
3a4fa0a25d
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild:
  kbuild: fix first module build
  kconfig: update kconfig-language text
  kbuild: introduce cc-cross-prefix
  kbuild: disable depmod in cross-compile kernel build
  kbuild: make deb-pkg - add 'Provides:' line
  kconfig: comment typo in scripts/kconfig/Makefile.
  kbuild: stop docproc segfaulting when SRCTREE isn't set.
  kbuild: modpost problem when symbols move from one module to another
  kbuild: cscope - filter out .tmp_* in find_sources
  kbuild: mailing list has moved
  kbuild: check asm symlink when building a kernel

Linus Torvalds   commited 2007-10-19 13:47:38 -07:00
4800be295c
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (41 commits)
  ACPICA: hw: Don't carry spinlock over suspend
  ACPICA: hw: remove use_lock flag from acpi_hw_register_{read, write}
  ACPI: cpuidle: port idle timer suspend/resume workaround to cpuidle
  ACPI: clean up acpi_enter_sleep_state_prep
  Hibernation: Make sure that ACPI is enabled in acpi_hibernation_finish
  ACPI: suppress uninitialized var warning
  cpuidle: consolidate 2.6.22 cpuidle branch into one patch
  ACPI: thinkpad-acpi: skip blanks before the data when parsing sysfs
  ACPI: AC: Add sysfs interface
  ACPI: SBS: Add sysfs alarm
  ACPI: SBS: Add ACPI_PROCFS around procfs handling code.
  ACPI: SBS: Add support for power_supply class (and sysfs)
  ACPI: SBS: Make SBS reads table-driven.
  ACPI: SBS: Simplify data structures in SBS
  ACPI: SBS: Split host controller (ACPI0001) from SBS driver (ACPI0002)
  ACPI: EC: Add new query handler to list head.
  ACPI: Add acpi_bus_generate_event4() function
  ACPI: Battery: add sysfs alarm
  ACPI: Battery: Add sysfs support
  ACPI: Battery: Misc clean-ups, no functional changes
  ...

Fix up conflicts in drivers/misc/thinkpad_acpi.[ch] manually

Linus Torvalds   commited 2007-10-19 13:12:46 -07:00
c4ec207173
kconfig: update kconfig-language text
Add kconfig-language docs for mainmenu, def_bool, and def_tristate.
Remove "requires" as a synonym of "depends on" since it was removed
from  the parser in commit 247537b9a2.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Randy Dunlap   authored and   Sam Ravnborg   commited 2007-10-19 21:48:36 +02:00
6e66b9005d
kbuild: introduce cc-cross-prefix
cc-cross-prefix is useful for the architecture that like
to provide a default CROSS_COMPILE value,
but may have several to select between.

Sample usage:

ifneq ($(SUBARCH),$(ARCH))
        ifeq ($(CROSS_COMPILE),)
               CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
        endif
endif

Actual usage by the different archs will taken care of later.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Sam Ravnborg   commited 2007-10-19 21:46:01 +02:00
910b40468a
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Delete totally outdated Documentation/mips/time.README
  [MIPS] Kill duplicated setup_irq() for cp0 timer
  [MIPS] Sibyte: Finish conversion to modern time APIs.
  [MIPS] time: Helpers to compute clocksource/event shift and mult values.
  [MIPS] SMTC: Build fix.
  [MIPS] time: Delete dead code.
  [MIPS] MIPSsim: Strip defconfig file to the bones.

Linus Torvalds   commited 2007-10-19 12:01:22 -07:00
0a4908e19f
Linux Kernel Markers - Documentation
Here is some documentation explaining what is/how to use the Linux
Kernel Markers.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Mathieu Desnoyers   authored and   Linus Torvalds   commited 2007-10-19 11:53:55 -07:00
26e3d11dd3
Add documentation for extended crashkernel syntax
This adds the documentation for the extended crashkernel syntax into
Documentation/kdump/kdump.txt.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: Andi Kleen <ak@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Bernhard Walle   authored and   Linus Torvalds   commited 2007-10-19 11:53:51 -07:00
fb391599f2
hotplug cpu: migrate a task within its cpuset
When a cpu is disabled, move_task_off_dead_cpu() is called for tasks that have
been running on that cpu.

Currently, such a task is migrated:
 1) to any cpu on the same node as the disabled cpu, which is both online
    and among that task's cpus_allowed
 2) to any cpu which is both online and among that task's cpus_allowed

It is typical of a multithreaded application running on a large NUMA system to
have its tasks confined to a cpuset so as to cluster them near the memory that
they share.  Furthermore, it is typical to explicitly place such a task on a
specific cpu in that cpuset.  And in that case the task's cpus_allowed
includes only a single cpu.

This patch would insert a preference to migrate such a task to some cpu within
its cpuset (and set its cpus_allowed to its entire cpuset).

With this patch, migrate the task to:
 1) to any cpu on the same node as the disabled cpu, which is both online
    and among that task's cpus_allowed
 2) to any online cpu within the task's cpuset
 3) to any cpu which is both online and among that task's cpus_allowed

In order to do this, move_task_off_dead_cpu() must make a call to
cpuset_cpus_allowed_locked(), a new subset of cpuset_cpus_allowed(), that will
not block.  (name change - per Oleg's suggestion)

Calls are made to cpuset_lock() and cpuset_unlock() in migration_call() to set
the cpuset mutex during the whole migrate_live_tasks() and
migrate_dead_tasks() procedure.

[akpm@linux-foundation.org: build fix]
[pj@sgi.com: Fix indentation and spacing]
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Cliff Wickman   authored and   Linus Torvalds   commited 2007-10-19 11:53:44 -07:00
470fd64644
get rid of input BIT* duplicate defines
get rid of input BIT* duplicate defines

use newly global defined macros for input layer. Also remove includes of
input.h from non-input sources only for BIT macro definiton. Define the
macro temporarily in local manner, all those local definitons will be
removed further in this patchset (to not break bisecting).
BIT macro will be globally defined (1<<x)

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: <dtor@mail.ru>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Cc: <lenb@kernel.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Cc: <perex@suse.cz>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: <vernux@us.ibm.com>
Cc: <malattia@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Jiri Slaby   authored and   Linus Torvalds   commited 2007-10-19 11:53:42 -07:00
7b19ada2ed
cpuset sched_load_balance flag
Add a new per-cpuset flag called 'sched_load_balance'.

When enabled in a cpuset (the default value) it tells the kernel scheduler
that the scheduler should provide the normal load balancing on the CPUs in
that cpuset, sometimes moving tasks from one CPU to a second CPU if the
second CPU is less loaded and if that task is allowed to run there.

When disabled (write "0" to the file) then it tells the kernel scheduler
that load balancing is not required for the CPUs in that cpuset.

Now even if this flag is disabled for some cpuset, the kernel may still
have to load balance some or all the CPUs in that cpuset, if some
overlapping cpuset has its sched_load_balance flag enabled.

If there are some CPUs that are not in any cpuset whose sched_load_balance
flag is enabled, the kernel scheduler will not load balance tasks to those
CPUs.

Moreover the kernel will partition the 'sched domains' (non-overlapping
sets of CPUs over which load balancing is attempted) into the finest
granularity partition that it can find, while still keeping any two CPUs
that are in the same shed_load_balance enabled cpuset in the same element
of the partition.

This serves two purposes:
 1) It provides a mechanism for real time isolation of some CPUs, and
 2) it can be used to improve performance on systems with many CPUs
    by supporting configurations in which load balancing is not done
    across all CPUs at once, but rather only done in several smaller
    disjoint sets of CPUs.

This mechanism replaces the earlier overloading of the per-cpuset
flag 'cpu_exclusive', which overloading was removed in an earlier
patch: cpuset-remove-sched-domain-hooks-from-cpusets

See further the Documentation and comments in the code itself.

[akpm@linux-foundation.org: don't be weird]
Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Paul Jackson   authored and   Linus Torvalds   commited 2007-10-19 11:53:41 -07:00
029190c515
Add cgroupstats
This patch is inspired by the discussion at
http://lkml.org/lkml/2007/4/11/187 and implements per cgroup statistics
as suggested by Andrew Morton in http://lkml.org/lkml/2007/4/11/263.  The
patch is on top of 2.6.21-mm1 with Paul's cgroups v9 patches (forward
ported)

This patch implements per cgroup statistics infrastructure and re-uses
code from the taskstats interface.  A new set of cgroup operations are
registered with commands and attributes.  It should be very easy to
*extend* per cgroup statistics, by adding members to the cgroupstats
structure.

The current model for cgroupstats is a pull, a push model (to post
statistics on interesting events), should be very easy to add.  Currently
user space requests for statistics by passing the cgroup file
descriptor.  Statistics about the state of all the tasks in the cgroup
is returned to user space.

TODO's/NOTE:

This patch provides an infrastructure for implementing cgroup statistics.
Based on the needs of each controller, we can incrementally add more statistics,
event based support for notification of statistics, accumulation of taskstats
into cgroup statistics in the future.

Sample output

# ./cgroupstats -C /cgroup/a
sleeping 2, blocked 0, running 1, stopped 0, uninterruptible 0

# ./cgroupstats -C /cgroup/
sleeping 154, blocked 0, running 0, stopped 0, uninterruptible 0

If the approach looks good, I'll enhance and post the user space utility for
the same

Feedback, comments, test results are always welcome!

[akpm@linux-foundation.org: build fix]
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Balbir Singh   authored and   Linus Torvalds   commited 2007-10-19 11:53:36 -07:00
846c7bb055
Task Control Groups: make cpusets a client of cgroups
Remove the filesystem support logic from the cpusets system and makes cpusets
a cgroup subsystem

The "cpuset" filesystem becomes a dummy filesystem; attempts to mount it get
passed through to the cgroup filesystem with the appropriate options to
emulate the old cpuset filesystem behaviour.

Signed-off-by: Paul Menage <menage@google.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Paul Menage   authored and   Linus Torvalds   commited 2007-10-19 11:53:36 -07:00
8793d854ed
Task Control Groups: shared cgroup subsystem group arrays
Replace the struct css_set embedded in task_struct with a pointer; all tasks
that have the same set of memberships across all hierarchies will share a
css_set object, and will be linked via their css_sets field to the "tasks"
list_head in the css_set.

Assuming that many tasks share the same cgroup assignments, this reduces
overall space usage and keeps the size of the task_struct down (three pointers
added to task_struct compared to a non-cgroups kernel, no matter how many
subsystems are registered).

[akpm@linux-foundation.org: fix a printk]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Paul Menage <menage@google.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Paul Menage   authored and   Linus Torvalds   commited 2007-10-19 11:53:36 -07:00
817929ec27
Task Control Groups: add cgroup_clone() interface
Add support for cgroup_clone(), a way to create new cgroups intended to
be used for systems such as namespace unsharing.  A new subsystem callback,
post_clone(), is added to allow subsystems to automatically configure cloned
cgroups.

Signed-off-by: Paul Menage <menage@google.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Paul Menage   authored and   Linus Torvalds   commited 2007-10-19 11:53:36 -07:00
697f416108
Task Control Groups: basic task cgroup framework
Generic Process Control Groups
--------------------------

There have recently been various proposals floating around for
resource management/accounting and other task grouping subsystems in
the kernel, including ResGroups, User BeanCounters, NSProxy
cgroups, and others.  These all need the basic abstraction of being
able to group together multiple processes in an aggregate, in order to
track/limit the resources permitted to those processes, or control
other behaviour of the processes, and all implement this grouping in
different ways.

This patchset provides a framework for tracking and grouping processes
into arbitrary "cgroups" and assigning arbitrary state to those
groupings, in order to control the behaviour of the cgroup as an
aggregate.

The intention is that the various resource management and
virtualization/cgroup efforts can also become task cgroup
clients, with the result that:

- the userspace APIs are (somewhat) normalised

- it's easier to test e.g. the ResGroups CPU controller in
 conjunction with the BeanCounters memory controller, or use either of
them as the resource-control portion of a virtual server system.

- the additional kernel footprint of any of the competing resource
 management systems is substantially reduced, since it doesn't need
 to provide process grouping/containment, hence improving their
 chances of getting into the kernel

This patch:

Add the main task cgroups framework - the cgroup filesystem, and the
basic structures for tracking membership and associating subsystem state
objects to tasks.

Signed-off-by: Paul Menage <menage@google.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Paul Menage   authored and   Linus Torvalds   commited 2007-10-19 11:53:36 -07:00
ddbcc7e8e5
kernel-api docbook: fix content problems
Fix kernel-api docbook contents problems.

docproc: linux-2.6.23-git13/include/asm-x86/unaligned_32.h: No such file or directory
Warning(linux-2.6.23-git13//include/linux/list.h:482): bad line: 			of list entry
Warning(linux-2.6.23-git13//mm/filemap.c:864): No description found for parameter 'ra'
Warning(linux-2.6.23-git13//block/ll_rw_blk.c:3760): No description found for parameter 'req'
Warning(linux-2.6.23-git13//include/linux/input.h:1077): No description found for parameter 'private'
Warning(linux-2.6.23-git13//include/linux/input.h:1077): No description found for parameter 'cdev'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: WU Fengguang <wfg@mail.ustc.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Randy Dunlap   authored and   Linus Torvalds   commited 2007-10-19 11:53:35 -07:00
8f731f7d83
remove unused flush_tlb_pgtables
Nobody uses flush_tlb_pgtables anymore, this patch removes all remaining
traces of it from all archs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Benjamin Herrenschmidt   authored and   Linus Torvalds   commited 2007-10-19 11:53:34 -07:00
1c7037db50