linux-kernel - Re: [tip: sched/core] sched: Fix performance regression introduced by mm

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Message-ID: <20230623081557.gf5xCGdD@linutronix.de>
Date:   Fri, 23 Jun 2023 10:15:57 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     John Johansen <john.johansen@...onical.com>
Cc:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Swapnil Sapkal <Swapnil.Sapkal@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org, linux-tip-commits@...r.kernel.org,
        Aaron Lu <aaron.lu@...el.com>, x86@...nel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [tip: sched/core] sched: Fix performance regression introduced
 by mm_cid

On 2023-06-23 00:16:35 [-0700], John Johansen wrote:
> With that said the patch does work, and seems to be stable in the broader
> testing it has gotten. Its more complicated than I would like, and wanted to
> play with ideas around improving it. I also wanted get some better benchmark data.
> All things I just haven't had time for

If you tell me what to do (as in run this) I could try to run it on a
machine. The current version, your proposal and kmalloc() instead.

> I am also not opposed to using some version of this patch now, to solve the
> immediate needs and working to improve it after the fact.

Sebastian