From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752027AbbDQGce (ORCPT ); Fri, 17 Apr 2015 02:32:34 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:40629 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750810AbbDQGcZ (ORCPT ); Fri, 17 Apr 2015 02:32:25 -0400 Date: Thu, 16 Apr 2015 23:32:20 -0700 From: Guenter Roeck To: linux-kernel@vger.kernel.org Cc: Chong Yuan , Wenbo Wang , Jens Axboe Subject: Upstream kernel fails to run on qemu-sparc64 due to commit 889fa31f0 (blk-mq: reduce unnecessary software queue looping) Message-ID: <20150417063220.GA2871@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-CTCH-PVer: 0000001 X-CTCH-Spam: Unknown X-CTCH-VOD: Unknown X-CTCH-Flags: 0 X-CTCH-RefID: str=0001.0A020204.5530A8F8.0040,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-CTCH-Score: 0.000 X-CTCH-ScoreCust: 0.000 X-CTCH-Rules: X-CTCH-SenderID: linux@roeck-us.net X-CTCH-SenderID-Flags: 0 X-CTCH-SenderID-TotalMessages: 1 X-CTCH-SenderID-TotalSpam: 0 X-CTCH-SenderID-TotalSuspected: 0 X-CTCH-SenderID-TotalConfirmed: 0 X-CTCH-SenderID-TotalBulk: 0 X-CTCH-SenderID-TotalVirus: 0 X-CTCH-SenderID-TotalRecipients: 0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: mailgid no entry from get_relayhosts_entry X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, my qemu-sparc64 tests fail to run with kernel v4.0-7245-ga39ef1a7c609. Bisect points to commit 889fa31f00b ("blk-mq: reduce unnecessary software queue looping"). Reverting this commit fixes the problem. I had a look into the commit, but I have no idea what might be wrong. I made the bisect log, images, configuration file, root file system, and directions on how to run the images available at http://server.roeck-us.net/qemu/sparc64. Please let me know if there is any other information I can provide. Guenter