linux-kernel - Re: [PATCH] mm, oom: remove 'prefer children over parent' heuristic

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Date:   Mon, 21 Jan 2019 10:15:18 -0800
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Roman Gushchin <guro@...com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm, oom: remove 'prefer children over parent' heuristic

On Sun, Jan 20, 2019 at 5:23 PM Tetsuo Handa
<penguin-kernel@...ove.sakura.ne.jp> wrote:
>
> Shakeel Butt wrote:
> > +     pr_err("%s: Kill process %d (%s) score %lu or sacrifice child\n",
> > +             message, task_pid_nr(p), p->comm, oc->chosen_points);
>
> This patch is to make "or sacrifice child" false. And, the process reported
> by this line will become always same with the process reported by
>
>         pr_err("Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB\n",
>                 task_pid_nr(victim), victim->comm, K(victim->mm->total_vm),
>                 K(get_mm_counter(victim->mm, MM_ANONPAGES)),
>                 K(get_mm_counter(victim->mm, MM_FILEPAGES)),
>                 K(get_mm_counter(victim->mm, MM_SHMEMPAGES)));
>
> . Then, better to merge these pr_err() lines?

Thanks, will remove the one in oom_kill_process.