Re: [PATCH v2] sched/fair: sanitize vruntime of entity being migrated

[Vincent Guittot]

On Tue, 21 Mar 2023 at 13:28, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>
> On Fri, Mar 17, 2023 at 05:08:10PM +0100, Vincent Guittot wrote:
> > Commit 829c1651e9c4 ("sched/fair: sanitize vruntime of entity being placed")
> > fixes an overflowing bug, but ignore a case that se->exec_start is reset
> > after a migration.
> >
> > For fixing this case, we delay the reset of se->exec_start after
> > placing the entity which se->exec_start to detect long sleeping task.
> >
> > In order to take into account a possible divergence between the clock_task
> > of 2 rqs, we increase the threshold to around 104 days.
> >
> >
> > Fixes: 829c1651e9c4 ("sched/fair: sanitize vruntime of entity being placed")
> > Signed-off-by: Zhang Qiao <zhangqiao22@xxxxxxxxxx>
> > Signed-off-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
>
> Just noticed, that SoB chain isn't valid, should Zhang be something
> like: Originally-by or Suggested-by or whatever?

Originally-by would be the right tag