From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 8FF661A0018 for ; Sat, 21 Nov 2015 02:28:46 +1100 (AEDT) Subject: Re: kernel BUG at drivers/scsi/scsi_lib.c:1096! From: Ewan Milne Reply-To: emilne@redhat.com To: Hannes Reinecke Cc: Christoph Hellwig , Michael Ellerman , 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 In-Reply-To: <564F3453.9040603@suse.de> 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> <564DEC41.5010600@suse.de> <1448030316.4067.18.camel@localhost.localdomain> <564F3453.9040603@suse.de> Content-Type: text/plain; charset="UTF-8" Date: Fri, 20 Nov 2015 10:28:43 -0500 Message-ID: <1448033323.4067.24.camel@localhost.localdomain> Mime-Version: 1.0 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2015-11-20 at 15:55 +0100, Hannes Reinecke wrote: > Can't we have a joint effort here? > I've been spending a _LOT_ of time trying to debug things here, but > none of the ideas I've come up with have been able to fix anything. Yes. I'm not the one primarily looking at it, and we don't have a reproducer in-house. We just have the one dump right now. > > I'm almost tempted to increase the count from scsi_alloc_sgtable() > by one and be done with ... > That might not fix it if it is a problem with the merge code, though.