From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Chris Wedgwood <cw@f00f.org>
Cc: Haar J?nos <djani22@netcenter.hu>, linux-kernel@vger.kernel.org
Subject: Re: swapper: page allocation failure.
Date: Sun, 21 May 2006 22:01:29 +1000 [thread overview]
Message-ID: <44705699.3080401@yahoo.com.au> (raw)
In-Reply-To: <20060521102642.GB5582@taniwha.stupidest.org>
Chris Wedgwood wrote:
> On Sun, May 21, 2006 at 11:31:12AM +0200, Haar J?nos wrote:
>
>
>>[root@st-0001 /]# uname -a
>>Linux st-0001 2.6.17-rc3-git1 #2 SMP Sun May 21 01:12:22 CEST 2006 i686 i686 i386 GNU/Linux
>
>
> did earlier kernels work OK?
>
>
>>This is a simple disk node.
>>It serves the md0 array, and uses mem for buffering-caching.
>
>
> odd, i looks like you've leaked alot of lowmem but i can't think why
>
> i've got major (induced) brain-fog right now so i'll have to think
> about it tomorrow sorry
The buffers are buffercache rather than the usual pagecache; due to
nbd I guess. Buffercache cannot be satisfied by highmem.
This would be a relatively uncommon setup, which explains why it
isn't working 100%. I don't know of any reason why reclaim speed
should be worse for buffercache, however one notable thing will be
that zone_normal's lowmem reserve that is untouchable by pagecache
will be eaten by buffercache...
Anyway, increasing /proc/sys/vm/min_free_kbytes should help. Janos,
perhaps you could try doubling it and see how you go?
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2006-05-21 12:01 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-21 8:10 swapper: page allocation failure Haar János
2006-05-21 8:16 ` Chris Wedgwood
2006-05-21 8:37 ` Haar János
2006-05-21 8:47 ` Chris Wedgwood
2006-05-21 9:03 ` Haar János
2006-05-21 9:10 ` Chris Wedgwood
2006-05-21 9:31 ` Haar János
2006-05-21 10:24 ` Chris Wedgwood
2006-05-21 10:42 ` Haar János
2006-05-21 10:26 ` Chris Wedgwood
2006-05-21 10:45 ` Haar János
2006-05-21 12:01 ` Nick Piggin [this message]
2006-05-21 13:58 ` Haar János
2006-05-22 0:09 ` Nick Piggin
2006-05-22 7:41 ` Haar János
2006-05-22 11:17 ` Con Kolivas
2006-05-22 15:08 ` Haar János
2006-05-22 15:12 ` Con Kolivas
2006-05-22 21:06 ` swapper: page allocation failure. - random reboot problem Haar János
2006-05-23 9:17 ` Nick Piggin
2006-05-23 10:16 ` Haar János
2006-05-23 10:24 ` Nick Piggin
2006-05-23 10:31 ` Haar János
2006-05-23 10:45 ` Nick Piggin
2006-05-23 11:01 ` Haar János
2006-05-21 9:23 ` swapper: page allocation failure Haar János
2006-05-21 12:03 ` Andrew Morton
2006-05-21 14:01 ` Haar János
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