On Tue, Aug 04, 2015 at 05:29:44PM -0700, Jason Low wrote:
> @@ -1137,6 +1148,13 @@ static inline int fastpath_timer_check(struct
> task_struct *tsk)
> if (READ_ONCE(sig->cputimer.running)) {
Maybe make that:
if (READ_ONCE(sig->cputimer.running) &&
!READ_ONCE(sig->cputimer.is_checking_timer)) {
> struct task_cputime group_sample;
>
> + /*
> + * If another thread in the group is already checking
> + * for the thread group cputimer, then we will skip that.
> + */
> + if (READ_ONCE(sig->cputimer.is_checking_timer))
> + return 0;
> +
> sample_cputime_atomic(&group_sample,
> &sig->cputimer.cputime_atomic);
>
> if (task_cputime_expired(&group_sample, &sig->cputime_expires))
--
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