linux-kernel - Re: NFS regression? Odd delays and lockups accessing an NFS export.

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Message-ID: <20080818231340.GP20684@miggy.org>
Date:	Tue, 19 Aug 2008 00:13:40 +0100
From:	Athanasius <link@...gy.org>
To:	jacliburn@...lsouth.net
Cc:	Grant Coady <gcoady.lk@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>, neilb@...e.de,
	bfields@...ldses.org, linux-nfs@...r.kernel.org
Subject: Re: NFS regression?  Odd delays and lockups accessing an NFS export.

On Mon, Aug 18, 2008 at 02:37:45PM -0500, J. K. Cliburn wrote:
> Athanasius wrote:
> >  I wonder if this is what I've been seeing.  I've been otherwise too
> >busy to properly report it, thinking that *someone* else must also be
> >seeing it and it's being worked on, else it's a subtle configuration
> >problem my end.
> >
> >  I first started seeing this with 2.6.26 on the client end, 
> 
> I see you're running the atl1 driver on your client.  I'm chasing an 
> intermittent bug in that driver that seems to be affected by certain 
> offload parameters.  Try disabling TSO and see if things improve.
> 
> ethtool -K eth0 tso off
> 
> Let me know if it helps.

  Indeed it does, and indeed tso was on by default.  I booted up once
after first trying this, thinking I had things set to apply it
automatically, but hadn't and ran into the exact same problem.  This 2nd
time around with the setting definitely applied things appear to be
working normally.  At least I can actually start Firefox up and have it
work (lots of /home/users/... access over NFS to the server).

thanks,

-Ath
-- 
- Athanasius = Athanasius(at)miggy.org / http://www.miggy.org/
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