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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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