On 8 October 2016 at 13:49, Mike Galbraith <efa...@gmx.de> wrote: > On Sat, 2016-10-08 at 13:37 +0200, Vincent Guittot wrote: >> On 8 October 2016 at 10:39, Ingo Molnar <mi...@kernel.org> wrote: >> > >> > * Peter Zijlstra <pet...@infradead.org> wrote: >> > >> > > On Fri, Oct 07, 2016 at 03:38:23PM -0400, Joseph Salisbury wrote: >> > > > Hello Peter, >> > > > >> > > > A kernel bug report was opened against Ubuntu [0]. After a >> > > > kernel >> > > > bisect, it was found that reverting the following commit >> > > > resolved this bug: >> > > > >> > > > commit 3d30544f02120b884bba2a9466c87dba980e3be5 >> > > > Author: Peter Zijlstra <pet...@infradead.org> >> > > > Date: Tue Jun 21 14:27:50 2016 +0200 >> > > > >> > > > sched/fair: Apply more PELT fixes >> >> This patch only speeds up the update of task group load in order to >> reflect the new load balance but It should not change the final value >> and as a result the final behavior. I will try to reproduce it in my >> target later today > > FWIW, I tried and failed w/wo autogroup on 4.8 and master.
Me too Is it possible to get some dump of /proc/sched_debug while the problem occurs ? Vincent > -Mike
