linux-kernel - Re: [RFC PATCH] mm, oom: disable dump

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Message-ID: <af0703d2-17e4-1b8e-eb54-58d7743cad60@i-love.sakura.ne.jp>
Date:   Wed, 4 Sep 2019 05:52:43 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Michal Hocko <mhocko@...nel.org>, linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Rientjes <rientjes@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Michal Hocko <mhocko@...e.com>
Subject: Re: [RFC PATCH] mm, oom: disable dump_tasks by default

On 2019/09/03 23:45, Michal Hocko wrote:
> It's primary purpose is
> to help analyse oom victim selection decision.

I disagree, for I use the process list for understanding what / how many
processes are consuming what kind of memory (without crashing the system)
for anomaly detection purpose. Although we can't dump memory consumed by
e.g. file descriptors, disabling dump_tasks() loose that clue, and is
problematic for me.