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SubjectRe: [PATCH -mm 4/4] oom: oom_forkbomb_penalty: move thread_group_cputime() out of task_lock()
On Fri, 2 Apr 2010, Oleg Nesterov wrote:

> It doesn't make sense to call thread_group_cputime() under task_lock(),
> we can drop this lock right after we read get_mm_rss() and save the
> value in the local variable.
> Note: probably it makes more sense to use sum_exec_runtime instead
> of utime + stime, it is much more precise. A task can eat a lot of
> CPU time, but its Xtime can be zero.
> Signed-off-by: Oleg Nesterov <>

Acked-by: David Rientjes <>

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