Messages in this thread | | | Date | Tue, 21 Apr 2015 16:10:21 +0800 | From | Wanpeng Li <> | Subject | Re: [PATCH 6/7] sched/deadline: depend on clearing throttled status in replenish_dl_entity |
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Hi Juri, On Tue, Apr 21, 2015 at 09:16:47AM +0100, Juri Lelli wrote: >Hi, > >On 06/04/2015 09:53, Wanpeng Li wrote: >> Since the natural place to clear ->dl_throttled is in replenish_dl_entity(), and >> the task which is adjusted the priority is the current, it will be dequeued and >> then enqueued w/ replenish which can guarantee ->dl_throttled can be cleared, >> this patch drop the clear throttled status in function rt_mutex_setprio. >> > >Patch looks good. But, I'd slightly change subject and changelog. Something like >this, maybe? > >sched/core: remove superfluous resetting of dl_throttled flag > >Resetting dl_throttled flag in rt_mutex_setprio (for a task that is going >to be boosted) is superfluous, as the natural place to do so is in >replenish_dl_entity(). If the task was on the runqueue and it is boosted >by a DL task, it will be enqueued back with ENQUEUE_REPLENISH flag set, >which can guarantee that dl_throttled is reset in replenish_dl_entity(). > >This patch drops the resetting of throttled status in function >rt_mutex_setprio().
Cool, many thanks for your review. :)
Regards, Wanpeng Li
> >Thanks, > >- Juri > >> Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com> >> --- >> kernel/sched/core.c | 1 - >> 1 file changed, 1 deletion(-) >> >> diff --git a/kernel/sched/core.c b/kernel/sched/core.c >> index 28b0d75..f1b9222 100644 >> --- a/kernel/sched/core.c >> +++ b/kernel/sched/core.c >> @@ -3037,7 +3037,6 @@ void rt_mutex_setprio(struct task_struct *p, int prio) >> if (!dl_prio(p->normal_prio) || >> (pi_task && dl_entity_preempt(&pi_task->dl, &p->dl))) { >> p->dl.dl_boosted = 1; >> - p->dl.dl_throttled = 0; >> enqueue_flag = ENQUEUE_REPLENISH; >> } else >> p->dl.dl_boosted = 0; >>
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