linux-kernel - Re: [PATCH v3] sched/core: Always flush pending blk

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Message-ID: <Yt5avpfSnen+NWUb@linutronix.de>
Date:   Mon, 25 Jul 2022 10:56:30 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     John Keeping <john@...anate.com>
Cc:     linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>
Subject: Re: [PATCH v3] sched/core: Always flush pending blk_plug

On 2022-07-08 17:27:02 [+0100], John Keeping wrote:
> Looking at the history of the -rt patchset, in fact this change was
> present from v5.9.1-rt20 until being dropped in v5.13-rt1 as it was part
> of a larger patch [1] most of which was replaced by commit b4bfa3fcfe3b
> ("sched/core: Rework the __schedule() preempt argument").

Thanks for spotting that. The plan was to get rid of this with the
introduction of schedule_rtlock() but it somehow remained resilient.

Sebastian