Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754480AbYLCTHN (ORCPT ); Wed, 3 Dec 2008 14:07:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752906AbYLCTG7 (ORCPT ); Wed, 3 Dec 2008 14:06:59 -0500 Received: from smtp1.linux-foundation.org ([140.211.169.13]:60575 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752775AbYLCTG4 (ORCPT ); Wed, 3 Dec 2008 14:06:56 -0500 Date: Wed, 3 Dec 2008 11:06:00 -0800 From: Andrew Morton To: "Kay Sievers" Cc: "Mark Jackson" , linux-kernel@vger.kernel.org, "Haavard Skinnemoen" , "Peter Zijlstra" , "David Woodhouse" Subject: Re: Badness at mm/backing-dev.c:179 Message-Id: <20081203110600.665af037.akpm@linux-foundation.org> In-Reply-To: References: <49367691.5060007@mimc.co.uk> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1451 Lines: 34 On Wed, 3 Dec 2008 13:22:47 +0100 "Kay Sievers" wrote: > On Wed, Dec 3, 2008 at 13:07, Mark Jackson wrote: > > The following commit causes a "Badness at mm/backing-dev.c:179":- > > > > f1d0b063d993527754f062c589b73f125024d216 is first bad commit > > commit f1d0b063d993527754f062c589b73f125024d216 > > Author: Kay Sievers > > Date: Tue Dec 2 10:31:50 2008 -0800 > > > > bdi: register sysfs bdi device only once per queue > > > Below is the extract from dmesg:- > > > > ------------[ cut here ]------------ > > Badness at mm/backing-dev.c:179 > > That's a known issue, and will not cause any harm besides printing > this warning. Andrew added the warning to catch drivers who use one > single request queue for multiple devices. Currently known are mtd and > floppy (triggers only if you have more than one device per driver). > The drivers need to be changed to use a separate queue per device, to > get rid of this warning. Actually, adding that warning wasn't such a great idea - we'll just get heaps of email about things we already know about. I think I'll take it out again. Which means this stuff won't get fixed for ages :( -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/