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Date: Wed, 5 Feb 2003 01:39:09 -0800
From: Andrew Morton <akpm@digeo.com>
To: t.baetzler@bringe.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: filesystem access slowing system to a crawl
Message-Id: <20030205013909.6a8c04a3.akpm@digeo.com>
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>
> Hi,
> 
> maybe you could help me out with a really weird problem we're having
> with a NFS fileserver for a couple of webservers:
> 
> - Dual Xeon 2.2 GHz
> - 6 GB RAM
> - QLogic FCAL Host adapter with about 5.5 TB on a several RAIDs
> - Debian "woody" w/Kernel 2.4.19
> 
> Running just "find /" (or ls -R or tar on a large directory) locally
> slows the box down to absolute unresponsiveness - it takes minutes
> to just run ps and kill the find process. During that time, kupdated
> and kswapd gobble up all available CPU time. 
> 

Could be that your "low memory" is filled up with inodes.  This would
only happen in these tests if you're using ext2, and there are a *lot*
of directories.

I've prepared a lineup of Andrea's VM patches at

http://www.zip.com.au/~akpm/linux/patches/2.4/2.4.21-pre4/

It would be useful if you could apply 10_inode-highmem-2.patch and
report back.  It applies to 2.4.19 as well, and should work OK there.


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