Re: [PATCH] sched/fair: sanitize vruntime of entity being placed

[Chen Yu]

On 2023-01-29 at 09:27:07 +0800, Zhang Qiao wrote:
> Hi, Chenyu,
> 
> On 2023/1/29 1:27, Chen Yu wrote:
> > Hi Roman, Qiao,
> > On 2023-01-27 at 17:32:30 +0100, Roman Kagan wrote:
> >> From: Zhang Qiao <zhangqiao22@xxxxxxxxxx>
[snip]
> > If I understand correctly, se->exec_start is just updated by enqueue_entity()->update_curr(cfs_rq),
> 
> When a task go to sleep, se->exec_start will update at dequeue_entity()->update_curr(cfs_rq).
> And enqueue_entity()->update_curr(cfs_rq) just update current se.
>
You are right. update_curr(cfs_rq) only updates the current running one and the se
has not been queued yet.

thanks,
Chenyu