14 Apr, 2009
2 commits
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The description about various statistics from memory.stat is not accurate
and confusing at times.Correct this along with a few other minor cleanups.
Signed-off-by: Bharata B Rao
Acked-by: Balbir Singh
Acked-by: KAMEZAWA Hiroyuki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
After the introduction of resource counters hierarchies
(28dbc4b6a01fb579a9441c7b81e3d3413dc452df) the prototypes of
res_counter_init() and res_counter_charge() have been changed.Keep the documentation consistent with the actual function prototypes.
Signed-off-by: Andrea Righi
Cc: Paul Menage
Cc: Pavel Emelyanov
Cc: Balbir Singh
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Apr, 2009
1 commit
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Merge reason: update to latest upstream to queue up fix
Signed-off-by: Ingo Molnar
04 Apr, 2009
1 commit
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits)
trivial: Update my email address
trivial: NULL noise: drivers/mtd/tests/mtd_*test.c
trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h
trivial: Fix misspelling of "Celsius".
trivial: remove unused variable 'path' in alloc_file()
trivial: fix a pdlfush -> pdflush typo in comment
trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL
trivial: wusb: Storage class should be before const qualifier
trivial: drivers/char/bsr.c: Storage class should be before const qualifier
trivial: h8300: Storage class should be before const qualifier
trivial: fix where cgroup documentation is not correctly referred to
trivial: Give the right path in Documentation example
trivial: MTD: remove EOL from MODULE_DESCRIPTION
trivial: Fix typo in bio_split()'s documentation
trivial: PWM: fix of #endif comment
trivial: fix typos/grammar errors in Kconfig texts
trivial: Fix misspelling of firmware
trivial: cgroups: documentation typo and spelling corrections
trivial: Update contact info for Jochen Hein
trivial: fix typo "resgister" -> "register"
...
03 Apr, 2009
3 commits
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This patch tries to fix OOM Killer problems caused by hierarchy.
Now, memcg itself has OOM KILL function (in oom_kill.c) and tries to
kill a task in memcg.But, when hierarchy is used, it's broken and correct task cannot
be killed. For example, in following cgroup/groupA/ hierarchy=1, limit=1G,
01 nolimit
02 nolimit
All tasks' memory usage under /groupA, /groupA/01, groupA/02 is limited to
groupA's 1Gbytes but OOM Killer just kills tasks in groupA.This patch provides makes the bad process be selected from all tasks
under hierarchy. BTW, currently, oom_jiffies is updated against groupA
in above case. oom_jiffies of tree should be updated.To see how oom_jiffies is used, please check mem_cgroup_oom_called()
callers.[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: const fix]
Signed-off-by: KAMEZAWA Hiroyuki
Cc: Paul Menage
Cc: Li Zefan
Cc: Balbir Singh
Cc: Daisuke Nishimura
Cc: David Rientjes
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This won't remove cpuacct from the mounted hierachy:
# mount -t cgroup -o cpu,cpuacct xxx /mnt
# mount -o remount,cpu /mntBecause for this usage mount(8) will append the new options to the original
options.And this will get you right:
# mount [-t cgroup] -o remount,cpu xxx /mntAlso document how to specify or change release_agent.
Signed-off-by: Li Zefan
Reviewd-by: KAMEZAWA Hiroyuki
Cc: Paul Menage
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In following situation, with memory subsystem,
/groupA use_hierarchy==1
/01 some tasks
/02 some tasks
/03 some tasks
/04 emptyWhen tasks under 01/02/03 hit limit on /groupA, hierarchical reclaim
is triggered and the kernel walks tree under groupA. In this case,
rmdir /groupA/04 fails with -EBUSY frequently because of temporal
refcnt from the kernel.In general. cgroup can be rmdir'd if there are no children groups and
no tasks. Frequent fails of rmdir() is not useful to users.
(And the reason for -EBUSY is unknown to users.....in most cases)This patch tries to modify above behavior, by
- retries if css_refcnt is got by someone.
- add "return value" to pre_destroy() and allows subsystem to
say "we're really busy!"Signed-off-by: KAMEZAWA Hiroyuki
Cc: Paul Menage
Cc: Li Zefan
Cc: Balbir Singh
Cc: Daisuke Nishimura
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Apr, 2009
1 commit
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Add per-cgroup cpuacct controller statistics like the system and user
time consumed by the group of tasks.Changelog:
v7
- Changed the name of the statistic from utime to user and from stime to
system so that in future we could easily add other statistics like irq,
softirq, steal times etc easily.v6
- Fixed a bug in the error path of cpuacct_create() (pointed by Li Zefan).v5
- In cpuacct_stats_show(), use cputime64_to_clock_t() since we are
operating on a 64bit variable here.v4
- Remove comments in cpuacct_update_stats() which explained why rcu_read_lock()
was needed (as per Peter Zijlstra's review comments).
- Don't say that percpu_counter_read() is broken in Documentation/cpuacct.txt
as per KAMEZAWA Hiroyuki's review comments.v3
- Fix a small race in the cpuacct hierarchy walk.v2
- stime and utime now exported in clock_t units instead of msecs.
- Addressed the code review comments from Balbir and Li Zefan.
- Moved to -tip tree.v1
- Moved the stime/utime accounting to cpuacct controller.Earlier versions
- http://lkml.org/lkml/2009/2/25/129Signed-off-by: Bharata B Rao
Signed-off-by: Balaji Rao
Cc: Dhaval Giani
Cc: Paul Menage
Cc: Andrew Morton
Cc: KAMEZAWA Hiroyuki
Reviewed-by: Li Zefan
Acked-by: Peter Zijlstra
Acked-by: Balbir Singh
Tested-by: Balbir Singh
LKML-Reference:
Signed-off-by: Ingo Molnar
30 Mar, 2009
3 commits
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cgroup documentation was moved to Documentation/cgroups/. There are some
places that still refer to Documentation/controllers/,
Documentation/cgroups.txt and Documentation/cpusets.txt. Fix those.Signed-off-by: Thadeu Lima de Souza Cascardo
Reviewed-by: Li Zefan
Acked-by: Paul Menage
Signed-off-by: Jiri Kosina -
While the Documentation example creates /cgroup/test, it removes
/test/cgroup, which is clearly not the intended path. Change that to
/cgroup/test.Acked-by: KAMEZAWA Hiroyuki
Signed-off-by: Thadeu Lima de Souza Cascardo
Signed-off-by: Jiri Kosina -
Minor typo and spelling corrections fixed whilst reading
to learn about cgroups capabilities.Signed-off-by: Chris Samuel
Acked-by: Paul Menage
Signed-off-by: Jiri Kosina
21 Feb, 2009
1 commit
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I noticed the old commit 8f5aa26c75b7722e80c0c5c5bb833d41865d7019
("cpusets: update_cpumask documentation fix") is not a complete fix,
resulting in inconsistent paragraphs. This patch fixes it and does other
fixes and updates:- s/migrate_all_tasks()/migrate_live_tasks()/
- describe more cpuset control files
- s/cpumask_t/struct cpumask/
- document cpu hotplug and change of 'sched_relax_domain_level' may cause
domain rebuild
- document various ways to query and modify cpusets
- the equivalent of "mount -t cpuset" is "mount -t cgroup -o cpuset,noprefix"Signed-off-by: Li Zefan
Acked-by: Randy Dunlap
Cc: Paul Menage
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Feb, 2009
1 commit
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The css_set hash table was introduced in 2.6.26, so update the
documentation accordingly.Signed-off-by: Li Zefan
Acked-by: Paul Menage
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Jan, 2009
1 commit
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Considering the recently found problem "memcg: fix refcnt handling at
swapoff", it's better to mention swapoff behavior in the memcg_test
document.Signed-off-by: KAMEZAWA Hiroyuki
Acked-by: Balbir Singh
Cc: Li Zefan
Cc: Daisuke Nishimura
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Jan, 2009
1 commit
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Move Documentation/cpusets.txt and Documentation/controllers/* to
Documentation/cgroups/Signed-off-by: Li Zefan
Acked-by: KAMEZAWA Hiroyuki
Acked-by: Balbir Singh
Acked-by: Paul Menage
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jan, 2009
2 commits
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These patches introduce new locking/refcount support for cgroups to
reduce the need for subsystems to call cgroup_lock(). This will
ultimately allow the atomicity of cgroup_rmdir() (which was removed
recently) to be restored.These three patches give:
1/3 - introduce a per-subsystem hierarchy_mutex which a subsystem can
use to prevent changes to its own cgroup tree2/3 - use hierarchy_mutex in place of calling cgroup_lock() in the
memory controller3/3 - introduce a css_tryget() function similar to the one recently
proposed by Kamezawa, but avoiding spurious refcount failures in
the event of a race between a css_tryget() and an unsuccessful
cgroup_rmdir()Future patches will likely involve:
- using hierarchy mutex in place of cgroup_lock() in more subsystems
where appropriate- restoring the atomicity of cgroup_rmdir() with respect to cgroup_create()
This patch:
Add a hierarchy_mutex to the cgroup_subsys object that protects changes to
the hierarchy observed by that subsystem. It is taken by the cgroup
subsystem (in addition to cgroup_mutex) for the following operations:- linking a cgroup into that subsystem's cgroup tree
- unlinking a cgroup from that subsystem's cgroup tree
- moving the subsystem to/from a hierarchy (including across the
bind() callback)Thus if the subsystem holds its own hierarchy_mutex, it can safely
traverse its own hierarchy.Signed-off-by: Paul Menage
Tested-by: KAMEZAWA Hiroyuki
Cc: Li Zefan
Cc: Balbir Singh
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- remove 'releasable' since it has been moved to the debug subsys.
- update lock requirements of subsys callbacks.Signed-off-by: Li Zefan
Cc: Paul Menage
Cc: KAMEZAWA Hiroyuki
Cc: Balbir Singh
Cc: Pavel Emelyanov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Nov, 2008
1 commit
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With this change, control file 'freezer.state' doesn't exist in root
cgroup, making root cgroup unfreezable.I think it's reasonable to disallow freeze tasks in the root cgroup. And
then we can avoid fork overhead when freezer subsystem is compiled but not
used.Also make writing invalid value to freezer.state returns EINVAL rather
than EIO. This is more consistent with other cgroup subsystem.Signed-off-by: Li Zefan
Acked-by: Paul Menage
Cc: Cedric Le Goater
Cc: Paul Menage
Cc: Matt Helsley
Cc: "Serge E. Hallyn"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
20 Oct, 2008
1 commit
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Describe why we need the freezer subsystem and how to use it in a
documentation file. Since the cgroups.txt file is focused on the
subsystem-agnostic portions of cgroups make a directory and move the old
cgroups.txt file at the same time.Signed-off-by: Matt Helsley
Cc: Paul Menage
Cc: containers@lists.linux-foundation.org
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
