From: Andrea Arcangeli <andrea@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: "Martin J. Bligh" <mbligh@aracnet.com>,
aebr@win.tue.nl, cmm@us.ibm.com, linux-kernel@vger.kernel.org,
ext2-devel@lists.sourceforge.net
Subject: Re: OOM problems on 2.6.12-rc1 with many fsx tests
Date: Thu, 24 Mar 2005 02:49:48 +0100 [thread overview]
Message-ID: <20050324014948.GE14202@opteron.random> (raw)
In-Reply-To: <20050323154232.376f977f.akpm@osdl.org>
On Wed, Mar 23, 2005 at 03:42:32PM -0800, Andrew Morton wrote:
> I'm suspecting here that we simply leaked a refcount on every darn
> pagecache page in the machine. Note how mapped memory has shrunk down to
> less than a megabyte and everything which can be swapped out has been
> swapped out.
>
> If so, then oom-killing everything in the world is pretty inevitable.
Agreed, it looks like a memleak of a page_count (while mapcount is fine).
I would suggest looking after pages part of pagecache (i.e.
page->mapcount not null) that have a mapcount of 0 and a page_count > 1,
almost all of them should be like that during the memleak, and almost
none should be like that before the memleak.
This seems unrelated to the bug that started the thread that was clearly
a slab shrinking issue and not a pagecache memleak.
Thanks.
next prev parent reply other threads:[~2005-03-24 1:50 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-15 20:44 OOM problems with 2.6.11-rc4 Noah Meyerhans
2005-03-15 21:56 ` Sean
2005-03-15 22:12 ` Lee Revell
2005-03-15 23:46 ` Andrew Morton
2005-03-18 16:12 ` Noah Meyerhans
2005-04-13 13:47 ` Andrea Arcangeli
2005-04-14 16:56 ` Noah Meyerhans
2005-03-16 0:31 ` Andrea Arcangeli
2005-03-16 11:12 ` Andrea Arcangeli
2005-03-16 12:04 ` Andrew Morton
2005-03-16 12:15 ` Andrew Morton
2005-03-16 18:37 ` Andrea Arcangeli
2005-03-16 22:21 ` Andrew Morton
2005-03-23 19:53 ` OOM problems on 2.6.12-rc1 with many fsx tests Mingming Cao
2005-03-23 22:49 ` Andrew Morton
2005-03-23 23:13 ` Martin J. Bligh
2005-03-23 23:20 ` Andrew Morton
2005-03-23 23:26 ` Andries Brouwer
2005-03-23 23:30 ` Martin J. Bligh
2005-03-23 23:42 ` Andrew Morton
2005-03-23 23:49 ` [Ext2-devel] " Badari Pulavarty
2005-03-24 1:49 ` Andrea Arcangeli [this message]
2005-03-24 2:00 ` Andrew Morton
2005-03-25 21:56 ` Andrew Morton
2005-03-25 22:11 ` [Ext2-devel] " Badari Pulavarty
2005-03-27 0:23 ` Mingming Cao
2005-03-27 19:22 ` Mingming Cao
2005-03-27 20:06 ` Badari Pulavarty
2005-03-27 20:17 ` Badari Pulavarty
2005-03-26 0:17 ` Dave Jones
2005-03-26 0:20 ` [Ext2-devel] " Badari Pulavarty
2005-04-04 1:35 ` Andrew Morton
2005-04-04 16:50 ` Mingming Cao
2005-04-04 20:04 ` Andrew Morton
2005-04-04 20:24 ` Martin J. Bligh
2005-04-04 20:33 ` Andrew Morton
2005-04-05 17:04 ` [Ext2-devel] " Mingming Cao
2005-04-06 1:23 ` Andrew Morton
2005-04-12 12:50 ` Stephen C. Tweedie
2005-04-05 16:44 ` Stephen C. Tweedie
2005-03-16 12:23 ` OOM problems with 2.6.11-rc4 Andrew Morton
2005-03-16 12:30 ` Andrew Morton
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