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Date: Sat, 17 Nov 2007 10:19:57 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: [BUG] 2.6.24-rc2-mm1 - kernel bug on nfs v4
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Cc: Trond Myklebust <trond.myklebust@fys.uio.no>, Peter,
	Zijlstra <a.p.zijlstra@chello.nl>, LKML <linux-kernel@vger.kernel.org>,
	Torsten Kaiser <just.for.lkml@googlemail.com>,
	Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
	linuxppc-dev@ozlabs.org, nfs@lists.sourceforge.net,
	Jan Blunck <jblunck@suse.de>, Balbir Singh <balbir@linux.vnet.ibm.com>
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On Sat, 17 Nov 2007 19:09:46 +0100 Ingo Molnar <mingo@elte.hu> wrote:

> 
> * Torsten Kaiser <just.for.lkml@googlemail.com> wrote:
> 
> > Sadly lockdep does not work for me, as it gets turned off early:
> > [   39.851594] ---------------------------------
> > [   39.855963] inconsistent {softirq-on-W} -> {in-softirq-W} usage.
> > [   39.861981] swapper/0 [HC0[0]:SC1[1]:HE0:SE0] takes:
> > [   39.866963]  (&n->list_lock){-+..}, at: [<ffffffff802935c1>]
> 
> hey, that means it found a bug - which is not sad at all :-)
> 

mutter.

Torsten, you could try CONFIG_SLAB=y, CONFIG_SLUB=n to see if you can make
some progress on the NFS problem.