From: Vincent Guittot <vincent.guittot@linaro.org>
To: Joseph Salisbury <joseph.salisbury@canonical.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
Mike Galbraith <efault@gmx.de>
Subject: Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes
Date: Wed, 12 Oct 2016 14:20:42 +0200 [thread overview]
Message-ID: <CAKfTPtDo7PsZjDSH4KteyCJ=yq63Ha5iwkucjRTvtP_J3o=MKw@mail.gmail.com> (raw)
In-Reply-To: <1475927349.5573.1.camel@gmx.de>
On 8 October 2016 at 13:49, Mike Galbraith <efault@gmx.de> wrote:
> On Sat, 2016-10-08 at 13:37 +0200, Vincent Guittot wrote:
>> On 8 October 2016 at 10:39, Ingo Molnar <mingo@kernel.org> wrote:
>> >
>> > * Peter Zijlstra <peterz@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 <peterz@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
next prev parent reply other threads:[~2016-10-12 12:26 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-07 19:38 [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Joseph Salisbury
2016-10-07 19:57 ` Linus Torvalds
2016-10-07 20:22 ` Joseph Salisbury
2016-10-07 20:37 ` Linus Torvalds
2016-10-08 8:00 ` Peter Zijlstra
2016-10-08 8:39 ` Ingo Molnar
2016-10-08 11:37 ` Vincent Guittot
2016-10-08 11:49 ` Mike Galbraith
2016-10-12 12:20 ` Vincent Guittot [this message]
2016-10-12 15:35 ` Joseph Salisbury
2016-10-12 16:21 ` Joseph Salisbury
2016-10-13 10:58 ` Vincent Guittot
2016-10-13 15:52 ` Joseph Salisbury
2016-10-13 16:48 ` Vincent Guittot
2016-10-13 18:49 ` Dietmar Eggemann
2016-10-13 21:34 ` Vincent Guittot
2016-10-14 8:24 ` Vincent Guittot
2016-10-14 13:10 ` Dietmar Eggemann
2016-10-14 15:18 ` Vincent Guittot
2016-10-14 16:04 ` Joseph Salisbury
2016-10-17 9:09 ` Vincent Guittot
2016-10-17 11:49 ` Dietmar Eggemann
2016-10-17 13:19 ` Peter Zijlstra
2016-10-17 13:54 ` Vincent Guittot
2016-10-17 22:52 ` Dietmar Eggemann
2016-10-18 8:43 ` Vincent Guittot
2016-10-18 9:07 ` Peter Zijlstra
2016-10-18 9:45 ` Vincent Guittot
2016-10-18 10:34 ` Peter Zijlstra
2016-10-18 11:56 ` Vincent Guittot
2016-10-18 21:58 ` Joonwoo Park
2016-10-19 6:42 ` Vincent Guittot
2016-10-19 9:46 ` Dietmar Eggemann
2016-10-19 11:25 ` Vincent Guittot
2016-10-19 15:33 ` Dietmar Eggemann
2016-10-19 17:33 ` Joonwoo Park
2016-10-19 17:50 ` Vincent Guittot
2016-10-19 11:33 ` Peter Zijlstra
2016-10-19 11:50 ` Vincent Guittot
2016-10-19 13:30 ` Morten Rasmussen
2016-10-19 17:41 ` Vincent Guittot
2016-10-20 7:56 ` Morten Rasmussen
2016-10-19 14:49 ` Joseph Salisbury
2016-10-19 14:53 ` Vincent Guittot
2016-10-18 11:15 ` Dietmar Eggemann
2016-10-18 12:07 ` Peter Zijlstra
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