From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Richter Subject: Re: [Bug 18252] spinlock lockup in __make_request <- submit_bio <- ondemand_readahead Date: Tue, 14 Sep 2010 08:56:43 +0200 Message-ID: <4C8F1CAB.7020004@s5r6.in-berlin.de> References: <4C8B50F1.4020502@s5r6.in-berlin.de> <20100913144139.b9e18133.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from einhorn.in-berlin.de ([192.109.42.8]:58953 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751389Ab0ING5V (ORCPT ); Tue, 14 Sep 2010 02:57:21 -0400 In-Reply-To: <20100913144139.b9e18133.akpm@linux-foundation.org> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Andrew Morton , Florian Mickler Cc: linux-kernel@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org, axboe@kernel.dk, linux-scsi@vger.kernel.org Andrew Morton wrote: >>> https://bugzilla.kernel.org/show_bug.cgi?id=18252 ... > What you've quoted above appears to be just the aftermath. > https://bugzilla.kernel.org/attachment.cgi?id=29562 indicates that the > kernel earlier crashed in scsi code, perhaps under > scsi_setup_fs_cmnd(). > > The question is: was that actually the first crash, or did an even > earlier one scroll off? It happened overnight. The screenshot https://bugzilla.kernel.org/attachment.cgi?id=29562 shows that there was a lot more logged before it. When I saw it in the morning I assumed that the tail was a repetition of the leading bug trace, but it seems I am mistaken. Florian Mickler wrote: > There was an scsi-related use-after-free OOPS fixed recently and pulled 3 days > ago. > > On Sat, 11 Sep 2010 19:07:44 +0000 > James Bottomley wrote: > >> This includes the oops from use after free, a set of qla2xxx fixes, some >> misc warning cleanups from the recently introduced printk issue, an hpsa >> lockup fix and a medium removal bug in sd introduced by the BKL >> pushdown. >> >> The patch is available here: >> >> master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6.git > > Maybe you are seeing that? > > (reacting to the general-protection-fault preceded by scsi_init in the > attachment jpg) Now that you point it out --- perhaps. Though I haven't looked into the mechanics of the now fixed scsi_ini_io use after free. I am going to update to 2.6.36-rc4 today (I had reverted to 2.6.35 since the report), and if the issue does not return after two weeks or so I will close it as fixed, I suggest. -- Stefan Richter -=====-==-=- =--= -===- http://arcgraph.de/sr/