linux-kernel - Re: Linux killed Kenny, bastard!

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Message-ID: <496C73DE.3030600@wpkg.org>
Date:	Tue, 13 Jan 2009 11:58:38 +0100
From:	Tomasz Chmielewski <mangoo@...g.org>
To:	LKML <linux-kernel@...r.kernel.org>, zbr@...emap.net
Subject: Re: Linux killed Kenny, bastard!

>> On Tue, 13 Jan 2009, Evgeniy Polyakov wrote:
>> 
>> > Like anything that spawns a thread or process per request/client, or
>> > preallocates set of them which connect to the huge object like database.
>> > Most of the time database/server is killed first instead of comparably
>> > small clients.
>> 
>> No, the reverse is true: when a task is chosen for oom kill based on the 
>> badness heuristic, the oom killer first attempts to kill any child task 
>> that isn't attached to the same mm.  If the child shares an mm, both tasks 
>> must die before memory freeing can occur.
> 
> It is a theory, not a practice. OOM-killer most of time starts from ssh,
> database and lighttpd on the tested machines, when it could start in
> the reverse order and do not touch ssh at all. Better not from daemon
> itself, but its fastcgi spawned processes.

How does this feature relate to:

config ANDROID_LOW_MEMORY_KILLER
         bool "Android Low Memory Killer"
         default N
         ---help---
           Register processes to be killed when memory is low

available in Staging drivers / Android?


-- 
Tomasz Chmielewski
http://wpkg.org

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