Re: [PATCH] sched/cputime: Mitigate performance regression in times()/clock_gettime()

[Peter Zijlstra]

On Wed, Aug 03, 2016 at 12:02:54PM +0200, Peter Zijlstra wrote:
> /*
>  * XXX comment on why this is needed goes here...
>  */
> static inline void prefetch_curr_exec_start(struct task_struct *p)
> {
> #ifdef CONFIG_FAIR_GROUP_SCHED
> 	struct sched_entity *curr = (&p->se)->cfs_rq->curr;
#else
	struct sched_entity *curr = task_rq(p)->cfs_rq->curr;
#endif

Would be the 'right' thing for !cgroup stuffs

> 
> 	prefetch(curr);
> 	prefetch(&curr->exec_start);
> }