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From: Andrea Arcangeli <andrea@suse.de>
To: Kristian Peters <kristian.peters@korseby.net>,
	lkml <linux-kernel@vger.kernel.org>
Subject: Re: oom killer in 2.4.23
Date: Fri, 5 Dec 2003 23:56:15 +0100	[thread overview]
Message-ID: <20031205225615.GE2121@dualathlon.random> (raw)
In-Reply-To: <20031205223825.GQ29119@mis-mike-wstn.matchmail.com>

On Fri, Dec 05, 2003 at 02:38:25PM -0800, Mike Fedyk wrote:
> On Fri, Dec 05, 2003 at 02:05:20PM +0100, Kristian Peters wrote:
> 
> > Dec  5 13:34:41 adlib kernel: VM: killing process khexedit
> > Dec  5 13:37:27 adlib kernel: VM: killing process mozilla-bin
> > Dec  5 13:37:56 adlib kernel: VM: killing process mozilla-bin
> > Dec  5 13:40:32 adlib kernel: VM: killing process XFree86
> 
> This is with 2.4.23?
> 
> Why is the VM killing anything if the oom-killer is removed?

the 2.4.23 kernel will kill the task that triggered the oom condition,
it has to kill something of course, and the task that triggered the oom
during the page fault is the only one we can kill synchronously easily,
in turn guaranteeing that the machine won't deadlock in omm.

the oom killer normally is meant as the heuristc that chooses a special
task to kill, instead of the one that triggered the oom condition. But
choosing a different task and not the one that triggered the oom in the
page fault, isn't math safe w.r.t deadlocks.

  reply	other threads:[~2003-12-05 22:55 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <Z6Iv-7O2-29@gated-at.bofh.it>
     [not found] ` <Z8Ag-3BK-3@gated-at.bofh.it>
     [not found]   ` <Zbyn-23P-29@gated-at.bofh.it>
2003-12-05 13:05     ` oom killer in 2.4.23 Kristian Peters
2003-12-05 13:56       ` Robert L. Harris
2003-12-05 19:58       ` Andrea Arcangeli
2003-12-06  9:31         ` Kristian Peters
2003-12-09 14:21           ` Andrea Arcangeli
2003-12-09 14:52             ` Richard B. Johnson
2003-12-09 17:06               ` Andrea Arcangeli
2003-12-09 18:50                 ` Kristian Peters
2003-12-05 22:38       ` Mike Fedyk
2003-12-05 22:56         ` Andrea Arcangeli [this message]
2003-12-04 16:12 Peter Bergmann
2003-12-04 17:02 ` Maciej Zenczykowski
2003-12-04 17:20   ` Guillermo Menguez Alvarez
2003-12-04 23:52     ` Andrea Arcangeli
2003-12-04 18:33   ` Peter Bergmann
2003-12-04 18:42     ` Jens Axboe
2003-12-04 20:38       ` Peter Bergmann
2003-12-04 20:28         ` Szakacsits Szabolcs
2003-12-04 23:58         ` Andrea Arcangeli

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