linux-kernel - Re: NFS woes again

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Message-Id: <1188307723.6701.138.camel@heimdal.trondhjem.org>
Date:	Tue, 28 Aug 2007 09:28:43 -0400
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Florin Iucha <florin@...ha.net>
Cc:	Bret Towe <magnade@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
Subject: Re: NFS woes again

On Mon, 2007-08-27 at 20:35 -0500, Florin Iucha wrote:
> On Mon, Aug 27, 2007 at 06:19:29PM -0700, Bret Towe wrote:
> > On 8/27/07, Trond Myklebust <trond.myklebust@....uio.no> wrote:
> > > > > this sounds alot like the post i did yesterday titled 'nfs4 hang regression'
> > > > > i tracked it down to commit 3d39c691ff486142dd9aaeac12f553f4476b7a6
> > > >
> > > > Yes, it certainly does -- all the symptoms match!
> > >
> > > Could you and Bret please check if the attached patch fixes the hang?
> >
> > no good for me still hangs after ~30minutes
> 
> I just booted into the new kernel
> (3d39c691ff486142dd9aaeac12f553f4476b7a6 + Trond's patch) and it hangs
> in 10-15 minutes.
> 
> Process traces available at http://iucha.net/nfs/23-rc2-nfs-fix-1/kernel.log.gz
> 
> Regards,
> florin

Doh! I see the problem: cancel_delayed_work_sync() shouldn't ever be
called recursively.

The following patch should be correct. Please just discard the previous
one...

Trond


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