linux-kernel - Re: 2.6.22-stable causes oomkiller to be invoked

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Message-ID: <20080103035942.GB26166@linux.vnet.ibm.com>
Date:	Thu, 3 Jan 2008 09:29:42 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Christoph Lameter <clameter@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, htejun@...il.com,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ibm.com>, maneesh@...ux.vnet.ibm.com,
	lkml <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: 2.6.22-stable causes oomkiller to be invoked

On Wed, Jan 02, 2008 at 01:54:12PM -0800, Christoph Lameter wrote:
> Just traced it again on my system: It is okay for the number of pages on 
> the quicklist to reach the high count that we see (although the 16 bit 
> limits are weird. You have around 4GB of memory in the system?). Up to 
> 1/16th of free memory of a node can be allocated for quicklists (this 
> allows the effective shutting down and restarting of large amounts of 
> processes)
> 
> The problem may be that this is run on a HIGHMEM system and the 
> calculation of allowable pages on the quicklists does not take into 
> account that highmem pages are not usable for quicklists (not sure about 
> ZONE_MOVABLE on i386. Maybe we need to take that into account as well?)
> 
> Here is a patch that removes the HIGHMEM portion from the calculation. 
> Does this change anything:
> 

Yep. This one hits it. I don't see the obvious signs of the oom
happening in the 5 mins I have run the script. I will let it run for
some more time.

Thanks!
-- 
regards,
Dhaval
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