From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: block: Always check queue limits for cloned requests Date: Sun, 29 Nov 2015 11:49:48 -0500 Message-ID: <20151129164947.GA15021@redhat.com> References: <1448524017-130967-1-git-send-email-hare@suse.de> <20151126131104.GA24297@redhat.com> <20151129114956.GA321@x4> <565B1D2A.5010603@suse.de> <20151129161532.GA302@x4> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx1.redhat.com ([209.132.183.28]:53616 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751558AbbK2Qtt (ORCPT ); Sun, 29 Nov 2015 11:49:49 -0500 Content-Disposition: inline In-Reply-To: <20151129161532.GA302@x4> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Markus Trippelsdorf Cc: Hannes Reinecke , Jens Axboe , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, Christoph Hellwig , "Martin K. Petersen" , Ewan Milne , Jeff Moyer On Sun, Nov 29 2015 at 11:15am -0500, Markus Trippelsdorf wrote: > On 2015.11.29 at 16:43 +0100, Hannes Reinecke wrote: > > On 11/29/2015 12:49 PM, Markus Trippelsdorf wrote: > > > > > > I'm still seeing the issue (BUG at drivers/scsi/scsi_lib.c:1096!) even > > > with this patch applied. > > > > > > markus@x4 linux % git describe > > > v4.4-rc2-215-g081f3698e606 > > > > > Can you generate a crashdump? > > I would need to cross-check with the other dumps I'm having to figure > > out if this really is the same issue. > > There have been other reports (and fixes) which show we're fighting > > several distinct issues here. > > Unfortunately no. The crash happens on the disk where I store my log > files. And after it happened the magic SysRq keys don't work anymore. > > The crash only happens on my spinning rust drive that uses the cfq > scheduler. The SSDs (deadline) are fine. > > The BUG happens reproducibly when building http://www.sagemath.org/ on > that drive. Are you using DM multipath? If unsure, please let us know which device(s) map to the "spinning rust drive", and provide output from: lsblk