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From: Claudio Martins <ctpm@ist.utl.pt>
To: Dave Chinner <david@fromorbit.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Order 0 page allocation failure under heavy I/O load
Date: Mon, 27 Oct 2008 06:47:31 +0100	[thread overview]
Message-ID: <200810270547.31123.ctpm@ist.utl.pt> (raw)
In-Reply-To: <20081026225723.GO18495@disturbed>

On Sunday 26 October 2008, Dave Chinner wrote:

> The host will hang for tens of seconds at a time with both CPU cores
> pegged at 100%, and eventually I get this in dmesg:
>
> [1304740.261506] linux: page allocation failure. order:0, mode:0x10000
> [1304740.261516] Pid: 10705, comm: linux Tainted: P          2.6.26-1-amd64

 Hello,

 Have you tried to increase vm.min_free_kbytes to something higher, that is 
>=30000?

 I think I have hit something similar on a box running nbd-server to export a 
3 SATA disk raid0 block device over Gigabit Ethernet.
 Increasing min_free_kbytes got rid of the messages for me... Though the load 
on your system is much higher than on mine.

 Regards

Cláudio


  reply	other threads:[~2008-10-27  5:54 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-26 22:57 Dave Chinner
2008-10-27  5:47 ` Claudio Martins [this message]
2008-10-27  6:22   ` Dave Chinner
2008-10-27  8:04     ` Peter Zijlstra
2008-10-27 10:17       ` Dave Chinner
2008-10-28 13:20 ` Miquel van Smoorenburg

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