linux-kernel - Re: [RFC PATCH v4 00/19] Core scheduling v4

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Date:   Thu, 2 Jan 2020 10:28:02 +0800
From:   Aubrey Li <aubrey.intel@...il.com>
To:     Dario Faggioli <dfaggioli@...e.com>
Cc:     Vineeth Remanan Pillai <vpillai@...italocean.com>,
        Phil Auld <pauld@...hat.com>,
        Nishanth Aravamudan <naravamudan@...italocean.com>,
        Julien Desfossez <jdesfossez@...italocean.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paul Turner <pjt@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Frédéric Weisbecker <fweisbec@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Greg Kerr <kerrnel@...gle.com>, Aaron Lu <aaron.lwe@...il.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [RFC PATCH v4 00/19] Core scheduling v4

On Tue, Nov 12, 2019 at 9:45 AM Dario Faggioli <dfaggioli@...e.com> wrote:
>
> On Fri, 2019-11-01 at 10:03 -0400, Vineeth Remanan Pillai wrote:
> > Hi Phil,
> >
> > > Unless I'm mistaken 7 of the first 8 of these went into sched/core
> > > and are now in linux (from v5.4-rc1). It may make sense to rebase
> > > on
> > > that and simplify the series.
> > >
> > Thanks a lot for pointing this out. We shall test on a rebased 5.4 RC
> > and post the changes soon, if the tests goes well. For v3, while
> > rebasing
> > to an RC kernel, we saw perf regressions and hence did not check the
> > RC kernel this time. You are absolutely right that we can simplify
> > the
> > patch series with 5.4 RC.
> >
> And, in case it's useful to anybody, here's a rebase of this series on
> top of 5.4-rc7:
>
> https://github.com/dfaggioli/linux/tree/wip/sched/v5.4-rc7-coresched
>

In case it's useful to anyone, I rebased the series on top of v5.5-rc4.
https://github.com/aubreyli/linux/tree/coresched_v4-v5.5-rc4

v5.5 includes a few scheduler rework and fix, so I modified patch1/2/6,
patch-0002 has relatively big changes, but still has no functionality
and logic change.

0001-sched-Wrap-rq-lock-access.patch
0002-sched-Introduce-sched_class-pick_task.patch
0003-sched-Core-wide-rq-lock.patch
0004-sched-Basic-tracking-of-matching-tasks.patch
0005-sched-A-quick-and-dirty-cgroup-tagging-interface.patch
0006-sched-Add-core-wide-task-selection-and-scheduling.patch
0007-sched-fair-Add-a-few-assertions.patch
0008-sched-Trivial-forced-newidle-balancer.patch
0009-sched-Debug-bits.patch
0010-sched-fair-wrapper-for-cfs_rq-min_vruntime.patch
0011-sched-fair-core-wide-vruntime-comparison.patch
0012-sched-fair-Wake-up-forced-idle-siblings-if-needed.patch

I verified by my test suites, it seems to work.

Thanks,
-Aubrey