From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Dufour Subject: Re: kernel BUG at drivers/scsi/scsi_lib.c:1096! Date: Fri, 20 Nov 2015 13:56:47 +0100 Message-ID: <564F188F.4080502@linux.vnet.ibm.com> References: <1447838334.1564.2.camel@ellerman.id.au> <1447855399.3974.24.camel@redhat.com> <1447894964.15206.0.camel@ellerman.id.au> <20151119082325.GA11419@infradead.org> <1448021448.14769.7.camel@ellerman.id.au> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from e06smtp13.uk.ibm.com ([195.75.94.109]:53992 "EHLO e06smtp13.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162299AbbKTM44 (ORCPT ); Fri, 20 Nov 2015 07:56:56 -0500 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 20 Nov 2015 12:56:53 -0000 In-Reply-To: <1448021448.14769.7.camel@ellerman.id.au> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Michael Ellerman , Christoph Hellwig Cc: Mark Salter , "James E. J. Bottomley" , brking , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-block@vger.kernel.org On 20/11/2015 13:10, Michael Ellerman wrote: > On Thu, 2015-11-19 at 00:23 -0800, Christoph Hellwig wrote: > >> It's pretty much guaranteed a block layer bug, most likely in the >> merge bios to request infrastucture where we don't obey the merging >> limits properly. >> >> Does either of you have a known good and first known bad kernel? > > Not me, I've only hit it one or two times. All I can say is I have hit it in > 4.4-rc1. > > Laurent, can you narrow it down at all? I'm trying bisect it but it's very time consuming, and I think I missed some bad kernel because I didn't let enough time to the system to panic. But I'm still on... Cheers