Return-Path: Received: from mail-out2.uio.no ([129.240.10.58]:42788 "EHLO mail-out2.uio.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932269Ab0D1W3i (ORCPT ); Wed, 28 Apr 2010 18:29:38 -0400 Subject: Re: NULL pointer dereference in 2.6.32.12 on mount attempt From: Trond Myklebust To: Robert Henney Cc: linux-nfs@vger.kernel.org In-Reply-To: <20100428222339.GA3490@rut.org> References: <20100428191758.GA16717@rut.org> <1272486263.2864.57.camel@localhost.localdomain> <20100428222339.GA3490@rut.org> Content-Type: text/plain; charset="UTF-8" Date: Wed, 28 Apr 2010 18:29:33 -0400 Message-ID: <1272493773.2864.73.camel@localhost.localdomain> Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 On Wed, 2010-04-28 at 18:23 -0400, Robert Henney wrote: > On Wed, Apr 28, 2010 at 04:24:23PM -0400, Trond Myklebust wrote: > > What happens if you do > > > > echo 1025 > /proc/sys/sunrpc/nfs_debug > > > > prior to trying the mount? > > the client becomes slow enough to be unusable after the value of nfs_debug > is changed to 1025, which is probably due to it being a diskless client. > although the root filesystem is not the mount causing the issue, I can > try and get a dedicated test machine set up soon to aid further testing. I was thinking more about what the contents of your kernel syslog. IOW: if you do dmesg -s 900000 > /tmp/dmesg.txt what are the contents of the file /tmp/dmesg.txt? Cheers Trond