From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Nick Piggin <piggin@cyberone.com.au>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Remove OOM killer from try_to_free_pages / all_unreclaimable braindamage
Date: Tue, 9 Nov 2004 05:15:45 -0200 [thread overview]
Message-ID: <20041109071545.GA5473@logos.cnet> (raw)
In-Reply-To: <20041108183552.7caccad1.akpm@osdl.org>
On Mon, Nov 08, 2004 at 06:35:52PM -0800, Andrew Morton wrote:
> Nick Piggin <piggin@cyberone.com.au> wrote:
> >
> > I'm not sure... it could also be just be a fluke
> > due to chaotic effects in the mm, I suppose :|
>
> 2.6 scans less than 2.4 before declaring oom. I looked at the 2.4
> implementation and thought "whoa, that's crazy - let's reduce it and see
> who complains". My three-year-old memory tells me it was reduced by 2x to
> 3x.
>
> We need to find testcases (dammit) and do the analysis. It could be that
> we're simply not scanning far enough.
Andrew,
When reading the code I was really suspicious of the all_unreclaimable code.
It basically stops scanning when reaching OOM conditions - that might be it.
I tried to disable it (ignore it if priority==0) - result: very slow progress
on extreme load.
next prev parent reply other threads:[~2004-11-09 10:37 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-05 20:01 [PATCH] Remove OOM killer from try_to_free_pages / all_unreclaimable braindamage Marcelo Tosatti
2004-11-05 20:01 ` Marcelo Tosatti
2004-11-05 23:32 ` Jesse Barnes
2004-11-05 23:47 ` Thomas Gleixner
2004-11-05 23:47 ` Thomas Gleixner
2004-11-06 1:20 ` Andrea Arcangeli
2004-11-06 1:20 ` Andrea Arcangeli
2004-11-06 1:26 ` Nick Piggin
2004-11-06 1:26 ` Nick Piggin
2004-11-06 1:36 ` Jesse Barnes
2004-11-06 1:36 ` Jesse Barnes
2004-11-06 1:50 ` Andrea Arcangeli
2004-11-06 1:50 ` Andrea Arcangeli
2004-11-06 9:47 ` Hugh Dickins
2004-11-06 9:47 ` Hugh Dickins
2004-11-06 10:53 ` Nick Piggin
2004-11-06 10:53 ` Nick Piggin
2004-11-06 15:29 ` Andrea Arcangeli
2004-11-06 15:29 ` Andrea Arcangeli
2004-11-06 15:29 ` Andrea Arcangeli
2004-11-06 15:29 ` Andrea Arcangeli
2004-11-06 16:21 ` Hugh Dickins
2004-11-06 16:21 ` Hugh Dickins
2004-12-10 6:02 ` William Lee Irwin III
2004-12-10 6:02 ` William Lee Irwin III
2004-11-06 11:37 ` Nikita Danilov
2004-11-06 11:37 ` Nikita Danilov
2004-11-06 15:32 ` Andrea Arcangeli
2004-11-06 15:32 ` Andrea Arcangeli
2004-11-06 16:54 ` Nikita Danilov
2004-11-06 16:54 ` Nikita Danilov
2004-11-06 17:44 ` Andrea Arcangeli
2004-11-06 17:44 ` Andrea Arcangeli
2004-11-06 19:24 ` Nikita Danilov
2004-11-06 19:24 ` Nikita Danilov
2004-11-07 1:16 ` Andrea Arcangeli
2004-11-07 1:16 ` Andrea Arcangeli
2004-11-06 10:11 ` Marcelo Tosatti
2004-11-06 10:11 ` Marcelo Tosatti
2004-11-06 1:55 ` Thomas Gleixner
2004-11-06 1:55 ` Thomas Gleixner
2004-11-06 10:28 ` Marcelo Tosatti
2004-11-06 10:28 ` Marcelo Tosatti
2004-11-17 22:54 ` Werner Almesberger
2004-11-17 22:54 ` Werner Almesberger
2004-11-17 23:27 ` Chris Ross
2004-11-17 23:27 ` Chris Ross
2004-11-18 0:04 ` Werner Almesberger
2004-11-18 0:04 ` Werner Almesberger
2004-11-18 0:28 ` Chris Ross
2004-11-18 0:28 ` Chris Ross
2004-11-18 1:14 ` Werner Almesberger
2004-11-18 1:14 ` Werner Almesberger
2004-11-18 8:20 ` Chris Ross
2004-11-18 8:20 ` Chris Ross
2004-11-18 10:01 ` Werner Almesberger
2004-11-18 10:01 ` Werner Almesberger
2004-11-18 14:44 ` Thomas Gleixner
2004-11-18 14:44 ` Thomas Gleixner
2004-11-18 15:10 ` Chris Friesen
2004-11-18 15:10 ` Chris Friesen
2004-11-06 10:05 ` Marcelo Tosatti
2004-11-06 10:05 ` Marcelo Tosatti
2004-11-06 15:44 ` Andrea Arcangeli
2004-11-06 15:44 ` Andrea Arcangeli
2004-11-06 15:52 ` Arjan van de Ven
2004-11-06 15:52 ` Arjan van de Ven
2004-11-06 17:09 ` Marcelo Tosatti
2004-11-06 17:09 ` Marcelo Tosatti
2004-11-07 0:48 ` Andrea Arcangeli
2004-11-07 0:48 ` Andrea Arcangeli
2004-11-07 11:21 ` Marcelo Tosatti
2004-11-07 11:21 ` Marcelo Tosatti
2004-11-06 12:53 ` [PATCH] Remove OOM killer Andries Brouwer
2004-11-06 12:53 ` Andries Brouwer
2004-11-06 10:41 ` Marcelo Tosatti
2004-11-06 10:41 ` Marcelo Tosatti
2004-11-07 9:26 ` Marko Macek
2004-11-07 9:26 ` Marko Macek
2004-11-07 11:34 ` memory overcommit (was: [PATCH] Remove OOM killer ...) Anton Ertl
2004-11-08 16:27 ` [PATCH] Remove OOM killer from try_to_free_pages / all_unreclaimable braindamage Marcelo Tosatti
2004-11-08 16:27 ` Marcelo Tosatti
2004-11-08 18:55 ` Marcelo Tosatti
2004-11-09 2:22 ` Nick Piggin
2004-11-09 2:35 ` Andrew Morton
2004-11-09 2:46 ` Nick Piggin
2004-11-09 7:18 ` Marcelo Tosatti
2004-11-09 7:15 ` Marcelo Tosatti [this message]
2004-11-10 1:11 ` Nick Piggin
[not found] <fa.ev73q5c.ejcnom@ifi.uio.no>
[not found] ` <fa.es1mdq5.76ib8j@ifi.uio.no>
2004-11-18 20:48 ` Bodo Eggert
2004-11-18 21:15 ` Werner Almesberger
2004-11-19 1:05 ` Bodo Eggert
2004-11-19 0:15 ` Andreas Dilger
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