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Date: Wed, 28 Jul 2004 11:21:35 +1000
From: Nick Piggin <nickpiggin@yahoo.com.au>
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To: Klaus Dittrich <kladit@t-online.de>
CC: Jan-Frode Myklebust <janfrode@parallab.uib.no>,
       Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: dentry cache leak? Re: rsync out of memory 2.6.8-rc2
References: <20040726150615.GA1119@xeon2.local.here> <20040726123702.222ae654.akpm@osdl.org> <4105633C.3080204@xeon2.local.here> <20040726133846.604cef91.akpm@osdl.org> <41057A16.60801@xeon2.local.here> <20040726221420.GA8789@ii.uib.no> <4106BE6C.1030701@xeon2.local.here> <4106C3B7.10603@xeon2.local.here>
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Klaus Dittrich wrote:
> Klaus Dittrich wrote:

>> I did a test with a value of 500. echo 500 > 
>> /proc/sys/vm/vfs_cache_pressure.
>>
>> The highest numbers a cat /proc/sys/fs/dentry-state then showed during
>> a du -s were
>> 780721  750505  45      0       0       0
>>
>> The system survied. No processes were killed.
>>
>> With vfs_cache_pressure=100 a cat /proc/sys/fs/dentry-state showed
>> numbers of about 1090000 before processes got killed.
>>
>> Hope that helps to narrow the region to look for what has changed.
>>
> PS. Two concurrent du -s however "kernel: Out of Memory: Killed process .."

Your vfs_cache_pressure probably wants to be higher than 500. Make it 10000.