linux-kernel - Re: [PATCH] sched/fair: vruntime should normalize when switching from fair

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Message-ID: <52ea5cf6-b22b-f026-5796-f52b3e40415a@google.com>
Date:   Fri, 31 Aug 2018 15:24:04 -0700
From:   Steve Muckle <smuckle@...gle.com>
To:     Dietmar Eggemann <dietmar.eggemann@....com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Miguel de Dios <migueldedios@...gle.com>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com, Todd Kjos <tkjos@...gle.com>,
        Paul Turner <pjt@...gle.com>,
        Quentin Perret <quentin.perret@....com>,
        Patrick Bellasi <Patrick.Bellasi@....com>,
        Chris Redpath <Chris.Redpath@....com>,
        Morten Rasmussen <Morten.Rasmussen@....com>,
        John Dias <joaodias@...gle.com>
Subject: Re: [PATCH] sched/fair: vruntime should normalize when switching from
 fair

On 08/29/2018 08:33 AM, Dietmar Eggemann wrote:
> Yes, this solves the issue for the case I described. Using
> 'p->sched_remote_wakeup' (WF_MIGRATED) looks more elegant than using
> 'p->sched_class == &fair_sched_class'.

It's confirmed that this patch solves the original issue we saw (and my 
test case passes for me as well). I will send this version out shortly.