linux-kernel - Re: [PATCH v3] mm: memcontrol: Don't flood OOM messages with no eligible task.

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Message-ID: <20181018075611.GY18839@dhcp22.suse.cz>
Date:   Thu, 18 Oct 2018 09:56:11 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org,
        syzkaller-bugs@...glegroups.com, guro@...com,
        kirill.shutemov@...ux.intel.com, linux-kernel@...r.kernel.org,
        rientjes@...gle.com, yang.s@...baba-inc.com,
        Andrew Morton <akpm@...ux-foundation.org>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        syzbot <syzbot+77e6b28a7a7106ad0def@...kaller.appspotmail.com>
Subject: Re: [PATCH v3] mm: memcontrol: Don't flood OOM messages with no
 eligible task.

On Thu 18-10-18 15:10:18, Sergey Senozhatsky wrote:
[...]
> and let's hear from MM people what they can suggest.
> 
> Michal, Andrew, Johannes, any thoughts?

I have already stated my position. Let's not reinvent the wheel and use
the standard printk throttling. If there are cases where oom reports
cause more harm than good I am open to add a knob to allow disabling it
altogether (it can be even fine grained one to control whether to dump
show_mem, task_list etc.).

But please let's stop this dubious one-off approaches.
-- 
Michal Hocko
SUSE Labs