Re: [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex

Juri Lelli
2023-04-27T05:53:27Z

Hi,

On 27/04/23 10:58, Xuewen Yan wrote:
> HI Juri,
>
> Would this patch be merged tobe stable-rc? In kernel5.15, we also find
> that the rwsem would be blocked for a long time, when we change the
> task's cpuset cgroup.
> And when we revert to the mutex, the delay would disappear.

Honestly, I'm not sure. This change is mostly improving performance, but
it is also true that it's fixing some priority inheritance corner cases.
So, I'm not sure it qualifies for stable, but it would be probably good to
have it there.

Thanks,
Juri