From: Jesper Krogh Subject: Re: 2.6.32.2 - WARNING: at lib/kref.c:43 kref_get+0x,23/0x2b() Date: Wed, 24 Feb 2010 08:19:06 +0100 Message-ID: <4B84D2EA.4090209@krogh.cc> References: <4B4F5A00.4060604@atmos.washington.edu> <20100122150325.6ad12428.akpm@linux-foundation.org> <20100127190522.GB18278@fieldses.org> <4B60C5D4.6070000@atmos.washington.edu> <20100202162228.GD4293@fieldses.org> <20100216182248.GA4922@nik-comp.linuxbox.cz> <20100216202121.GE26292@fieldses.org> <20100216202720.GB4922@nik-comp.linuxbox.cz> <20100216202947.GF26292@fieldses.org> <20100217151435.GC30897@develbox.linuxbox.cz> <20100220235105.GB15015@fieldses.org> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Cc: Nikola Ciprich , Harry Edmon , Andrew Morton , public-linux-kernel-u79uwXL29TY76Z2rM5mHXA-wOFGN7rlS/M9smdsby/KFg@public.gmane.org, public-linux-nfs-u79uwXL29TY76Z2rM5mHXA-wOFGN7rlS/M9smdsby/KFg@public.gmane.org, public-nikola.ciprich-Jp3n8lUXroTtwjQa/ONI9g-wOFGN7rlS/M9smdsby/KFg@public.gmane.org To: "J. Bruce Fields" Return-path: Received: from plane.gmane.org ([80.91.229.3]:37063 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754944Ab0BXIVl (ORCPT ); Wed, 24 Feb 2010 03:21:41 -0500 Received: from public by plane.gmane.org with local (Exim 4.63) (envelope-from ) id 1NkBko-0007ZL-HB for linux-nfs@vger.kernel.org; Wed, 24 Feb 2010 08:33:54 +0100 In-Reply-To: <20100220235105.GB15015@fieldses.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: J. Bruce Fields wrote: > On Wed, Feb 17, 2010 at 04:14:35PM +0100, Nikola Ciprich wrote: >> Well, >> I did a lot of stress tests, and it seems to be pretty random, and what's >> worse, I think it is more then one problem, oh great... >> Seems that at least one of my NFS problems was in fact caused by ext4 regression >> (what FS are you using?) >> applying this one: http://bugzilla.kernel.org/attachment.cgi?id=24975 >> improved things for me a lot (see http://bugzilla.kernel.org/show_bug.cgi?id=15231 for >> full discussion). >> I'll watch the machine for next few days and report... > > Is there *any* kernel (however old) on which you are confident you can > *not* reproduce the kref bug? I have got a bug that looks a lot like this on 2.6.32.8 yesterday less than 24 hours after booting the first 2.6.32 kernel but we have been running on 2.6.31 for 3 months before, so I'm fairly confident that it is a .31 -> .32 regression. http://lkml.org/lkml/2010/2/23/70 Jesper -- Jesper