Date: Wed, 1 Sep 2010 15:19:25 -0500 (CDT)
From: Christoph Lameter <cl@linux.com>
To: Trond Myklebust <Trond.Myklebust@netapp.com>
cc: Kian Mohageri <kian.mohageri@gmail.com>, davidr@ressman.org,
        linux-nfs@vger.kernel.org
Subject: Re: fsync/wb deadlocks in 2.6.32
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On Wed, 1 Sep 2010, Trond Myklebust wrote:

> >From what I could see in your original email to me, you appear to be
> using NFS over UDP on IPoIB on a 2.6.32-18 kernel. Is that still the
> case? If so, does anything change if you change to use TCP and/or an
> ordinary NIC?

It is still the case. We have changed to udp from tcp and saw no change.
We have not tried to use an Ethernet NIC instead.

> Your link to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561210
> appears to be the kswapd bug, which should be hacked around in later
> 2.6.32 stable versions.

We are runing 2.6.32.18 which should have the fix. But the issue is still
there.

Is there any other patch available?