cgroup: drop task_lock() protection around task->cgroups

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For optimization, task_lock() is additionally used to protect
task->cgroups.  The optimization is pretty dubious as either
css_set_rwsem is grabbed anyway or PF_EXITING already protects
task->cgroups.  It adds only overhead and confusion at this point.
Let's drop task_[un]lock() and update comments accordingly.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>

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This commit is contained in:

Tejun Heo 2014-02-25 10:04:03 -05:00

parent eaf797abc5

commit 0e1d768f1b

2 changed files with 28 additions and 75 deletions

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6

include/linux/cgroup.h

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97

kernel/cgroup.c

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