linux-kernel - Re: [PATCH] sched/numa: initialize numa statistics when forking new task

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Message-ID: <20220118103958.GT3301@suse.de>
Date:   Tue, 18 Jan 2022 10:39:58 +0000
From:   Mel Gorman <mgorman@...e.de>
To:     Honglei Wang <wanghonglei@...ichuxing.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        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>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        linux-kernel@...r.kernel.org,
        Honglei Wang <jameshongleiwang@....com>
Subject: Re: [PATCH] sched/numa: initialize numa statistics when forking new
 task

On Thu, Jan 13, 2022 at 09:39:20PM +0800, Honglei Wang wrote:
> The child processes will inherit numa_pages_migrated and
> total_numa_faults from the parent. It means even if there is no numa
> fault happen on the child, the statistics in /proc/$pid of the child
> process might show huge amount. This is a bit weird. Let's initialize
> them when do fork.
> 
> Signed-off-by: Honglei Wang <wanghonglei@...ichuxing.com>

Acked-by: Mel Gorman <mgorman@...e.de>

-- 
Mel Gorman
SUSE Labs