linux-kernel - Re: [PATCH v6 0/2] sched/numa: add per-process numa

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Message-ID: <9ba3577b-0098-86da-ff2e-636cb5a8ae1a@bytedance.com>
Date:   Thu, 27 Apr 2023 13:17:52 +0800
From:   Gang Li <ligang.bdlg@...edance.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        John Hubbard <jhubbard@...dia.com>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Mel Gorman <mgorman@...e.de>
Cc:     linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-doc@...r.kernel.org,
        John Hubbard <jhubbard@...dia.com>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        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>,
        Valentin Schneider <vschneid@...hat.com>
Subject: Re: [PATCH v6 0/2] sched/numa: add per-process numa_balancing

Hi,

Looks like there are no objections or comments. Do you have any ideas?

Can we merge this patch in the next merge window.

Thanks!

On 2023/4/12 22:06, Gang Li wrote:
> # Introduce
> Add PR_NUMA_BALANCING in prctl.
> 
> A large number of page faults will cause performance loss when numa
> balancing is performing. Thus those processes which care about worst-case
> performance need numa balancing disabled. Others, on the contrary, allow a
> temporary performance loss in exchange for higher average performance, so
> enable numa balancing is better for them.
> 
> Numa balancing can only be controlled globally by
> /proc/sys/kernel/numa_balancing. Due to the above case, we want to
> disable/enable numa_balancing per-process instead.
>