linux-kernel - [RFC PATCHSET v2] sched/fair: fix load balancer behavior when cgroup is in use

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Date:   Thu, 4 May 2017 16:28:38 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Mike Galbraith <efault@....de>, Paul Turner <pjt@...gle.com>,
        Chris Mason <clm@...com>, kernel-team@...com
Subject: [RFC PATCHSET v2] sched/fair: fix load balancer behavior when cgroup
 is in use

Hello,

v1 posting can be found at

  http://lkml.kernel.org/r/20170424201344.GA14169@wtj.duckdns.org

The patchset is still RFC and based on v4.11.  I used Peter's updated
calc_cfs_shares() instead of scaling manually and updated so that
runnable_load_avg is propagated independently from load_avg.  Due to
the way sched_entity and cfs_rq loads are calculated, this requires an
extra runnable_load_avg calculation for group sched_entities, but the
end result is cleaner and actually makes sense.

Vincent, can you please verify whether the regression that you see is
gone with this version?

Thanks.

-- 
tejun