From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755385AbZELUWZ (ORCPT ); Tue, 12 May 2009 16:22:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754156AbZELUWJ (ORCPT ); Tue, 12 May 2009 16:22:09 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:47690 "EHLO e1.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753190AbZELUWG (ORCPT ); Tue, 12 May 2009 16:22:06 -0400 Subject: Re: NFS regression? Odd delays and lockups accessing an NFS export. From: Frank Filz To: jacliburn@bellsouth.net Cc: Grant Coady , linux-kernel , neilb@suse.de, bfields@fieldses.org, linux-nfs@vger.kernel.org In-Reply-To: <48A9CF89.9090304@bellsouth.net> References: <20080818185048.GO20684@miggy.org> <48A9CF89.9090304@bellsouth.net> Content-Type: text/plain Organization: IBM Linux Technology Center Date: Tue, 12 May 2009 13:27:58 -0700 Message-Id: <1242160078.2404.6.camel@dyn9047022153> Mime-Version: 1.0 X-Mailer: Evolution 2.8.3 (2.8.3-2.fc6) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2008-08-18 at 14:37 -0500, J. K. Cliburn wrote: > Athanasius wrote: > > On Mon, Aug 18, 2008 at 12:02:20PM +1000, Grant Coady wrote: > >> I've been using NFS here for years, lately there's something odd going on > >> since about a month or so. Previously reported last month: > >> http://www.gossamer-threads.com/lists/linux/kernel/951419?page=last > >> > >> Now with 2.6.27-rc3 on one of the client boxes I get a complete stall > >> at odd times when accessing the server's exported directory, cannot > >> see a pattern to it. Eventually recovers after a Ctrl-C. Nothing in > >> the server or client log files. Not easy to reproduce either. > > > > 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. Was this ever resolved? We're seeing a similar hangup in a 2.6.27 kernel. Thanks Frank Filz