Date: Mon, 27 Mar 2006 19:00:27 -0800
From: Andrew Morton <akpm@osdl.org>
To: Andi Kleen <ak@suse.de>
Cc: bharata@in.ibm.com, linux-kernel@vger.kernel.org
Subject: Re: dcache leak in 2.6.16-git8
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	<20060327114813.GA11352@in.ibm.com>
	<200603271822.28043.ak@suse.de>
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Andi Kleen <ak@suse.de> wrote:
>
> On Monday 27 March 2006 13:48, Bharata B Rao wrote:
> > On Mon, Mar 27, 2006 at 07:50:20AM +0200, Andi Kleen wrote:
> > > 
> > > A 2GB x86-64 desktop system here is currently swapping itself to death after
> > > a few days uptime.
> > > 
> > > Some investigation shows this:
> > > 
> > > inode_cache         1287   1337    568    7    1 : tunables   54   27    8 : slabdata    191    191      0
> > > dentry_cache      1867436 1867643    208   19    1 : tunables  120   60    8 : slabdata  98297  98297      0
> > > 
> > 
> > Would it be possible to try out this experimental patch which
> > gets some stats from the dentry cache ?
> 
> It should be trivial to reproduce by other people. Biggest workload
> is kernel compiles and quilt.
> 
> After a few hours with -git12 it's already at
> 
> dentry_cache      947013 952014    208   19    1 : tunables  120   60    8 : slabdata  50100  50106    480
> 
> and starting to go into swap.
> 
> I can't imagine I'm the only one seeing this?
> 
> I have a few x86-64 patches applied too, but they don't change anything
> in this area.

I don't think I can reproduce this on x86 uniproc.  (avtab_node_cache
is a different story - maintainers separately pinged).

I'd expect pretty much everything we have in there now was under test in
-mm for quite some time - any obvious leaks would have been noticed.  I'd
be suspecting recent changes in perhaps audit or nfs, at a guess.  Or
something weird.

Which filesystems are in use?
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