Re: [PATCH -tip 08/32] sched/fair: Fix forced idle sibling starvation corner case

2020-11-22 Thread Balbir Singh
On Tue, Nov 17, 2020 at 06:19:38PM -0500, Joel Fernandes (Google) wrote: > From: Vineeth Pillai > > If there is only one long running local task and the sibling is > forced idle, it might not get a chance to run until a schedule > event happens on any cpu in the core. > > So we check for this

[PATCH -tip 08/32] sched/fair: Fix forced idle sibling starvation corner case

2020-11-17 Thread Joel Fernandes (Google)
From: Vineeth Pillai If there is only one long running local task and the sibling is forced idle, it might not get a chance to run until a schedule event happens on any cpu in the core. So we check for this condition during a tick to see if a sibling is starved and then give it a chance to