Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752655AbYHRTTz (ORCPT ); Mon, 18 Aug 2008 15:19:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751475AbYHRTTl (ORCPT ); Mon, 18 Aug 2008 15:19:41 -0400 Received: from mail-out1.uio.no ([129.240.10.57]:60028 "EHLO mail-out1.uio.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751028AbYHRTTj (ORCPT ); Mon, 18 Aug 2008 15:19:39 -0400 Subject: Re: NFS regression? Odd delays and lockups accessing an NFS export. From: Trond Myklebust To: Athanasius Cc: Grant Coady , linux-kernel , neilb@suse.de, bfields@fieldses.org, linux-nfs@vger.kernel.org In-Reply-To: <20080818185048.GO20684@miggy.org> References: <20080818185048.GO20684@miggy.org> Content-Type: text/plain Date: Mon, 18 Aug 2008 15:19:33 -0400 Message-Id: <1219087173.7192.17.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit X-UiO-Spam-info: not spam, SpamAssassin (score=-5.0, required=5.0, autolearn=disabled, UIO_MAIL_IS_INTERNAL=-5, uiobl=NO, uiouri=NO) X-UiO-Scanned: 9B0F82F283114020A0CE0DD89F511B3CA2CB51FD X-UiO-SPAM-Test: remote_host: 68.40.183.129 spam_score: -49 maxlevel 200 minaction 2 bait 0 mail/h: 1 total 19 max/h 2 blacklist 0 greylist 0 ratelimit 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1352 Lines: 31 On Mon, 2008-08-18 at 19:50 +0100, 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. Your lockdep trace basically shows that the rpc layer is blocking for some reason. Could you please try to reproduce the problem, and then do echo 0 >/proc/sys/sunrpc/rpc_debug ...and see what the output from 'dmesg' shows? Cheers Trond -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/