linux-kernel - Re: [Question] how to detect mm leaker and kill?

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Message-ID: <BANLkTi=WORnf0PrQZQ79ZpqFv2NaC-dPUg@mail.gmail.com>
Date:	Sun, 8 May 2011 16:21:20 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yong Zhang <yong.zhang0@...il.com>
Subject: Re: [Question] how to detect mm leaker and kill?

On Sat, May 7, 2011 at 6:48 AM, David Rientjes <rientjes@...gle.com> wrote:
> On Fri, 6 May 2011, Hillf Danton wrote:
>
>> Hi
>>
>> In the scenario that 2GB  physical RAM is available, and there is a
>> database application that eats 1.4GB RAM without leakage already
>> running, another leaker who leaks 4KB an hour is also running, could
>> the leaker be detected and killed in mm/oom_kill.c with default
>> configure when oom happens?
>>
>
> Yes, if you know the database application is going to use 70% of your
> system RAM and you wish to discount that from its memory use when being
> considered for oom kill, set its /proc/pid/oom_score_adj to -700.
>
> This is only possible on 2.6.36 and later kernels when oom_score_adj was
> introduced.
>
> If you'd like to completely disable oom killing, set
> /proc/pid/oom_score_adj to -1000.
>

Thank you very much, David, for cool answer to my question.

Hillf
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