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Must echo a task id to the cgroups' tasks file, but not to a directory.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
According to commit 676db4af04 ("cgroupfs: create /sys/fs/cgroup to
mount cgroupfs on") the canonical mountpoint for the cgroup filesystem
is /sys/fs/cgroup. Hence, this should be used in the documentation.
Signed-off-by: Jörg Sommer <joerg@alea.gnuu.de>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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/2009/2/25/129
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Balaji Rao <balajirrao@gmail.com>
Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Tested-by: Balbir Singh <balbir@linux.vnet.ibm.com>
LKML-Reference: <20090331043222.GA4093@in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
