linux-kernel - Re: [RFC PATCH v2 4/5] sched/fair: Simplify load_cfs_rq

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Message-ID: <CAFpoUr3APdFordH+1XjHPWP5FtKuQBAXSRTt4arruMkQcx2ufg@mail.gmail.com>
Date:   Wed, 15 Sep 2021 19:59:27 +0100
From:   Odin Ugedal <odin@...d.al>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     Michal Koutný <mkoutny@...e.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Phil Auld <pauld@...hat.com>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Odin Ugedal <odin@...d.al>, Rik van Riel <riel@...riel.com>,
        Giovanni Gherdovich <ggherdovich@...e.cz>
Subject: Re: [RFC PATCH v2 4/5] sched/fair: Simplify load_cfs_rq_list maintenance

ons. 15. sep. 2021 kl. 13:31 skrev Vincent Guittot <vincent.guittot@...aro.org>:
> The corner cases that I wanted to check, are covered by
> a7b359fc6a37 ("sched/fair: Correctly insert cfs_rq's to list on unthrottle")
> and
> fdaba61ef8a2 ("sched/fair: Ensure that the CFS parent is added after
> unthrottling")

Still have some more of my testing stuff from when i discovered the issues
behind a7b359fc6a37 ("sched/fair: Correctly insert cfs_rq's to list on
unthrottle") as
well, so will take a look at this patch later this week.

Need to wrap my head around this logic again, but the idea looks good
at first sight.

Thanks
Odin