Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755152AbZGHQoU (ORCPT ); Wed, 8 Jul 2009 12:44:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753848AbZGHQoM (ORCPT ); Wed, 8 Jul 2009 12:44:12 -0400 Received: from bedivere.hansenpartnership.com ([66.63.167.143]:51143 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753525AbZGHQoL (ORCPT ); Wed, 8 Jul 2009 12:44:11 -0400 Subject: Re: [BUG] Linux-2.6.31-rc1-git9 Cannot Recognize Empty DVD Media From: James Bottomley To: Daniel Walker Cc: Maciej Rutecki , Andrew Morton , Tarkan Erimer , Jens Axboe , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org In-Reply-To: <1247069178.5973.6.camel@desktop> References: <4A4CB4B4.5010307@turknet.net.tr> <20090702130728.22af524c.akpm@linux-foundation.org> <8db1092f0907080609w60e37ac0id49a44bd4796b425@mail.gmail.com> <1247063244.4159.40.camel@mulgrave.site> <1247069178.5973.6.camel@desktop> Content-Type: text/plain Date: Wed, 08 Jul 2009 16:44:05 +0000 Message-Id: <1247071445.4159.214.camel@mulgrave.site> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1305 Lines: 41 On Wed, 2009-07-08 at 09:06 -0700, Daniel Walker wrote: > On Wed, 2009-07-08 at 09:27 -0500, James Bottomley wrote: > > > > You might also try this patch from martin petersen: it will print out > > the actual command that's causing the problems ... that might give a > > clue. > > > > James > > On the bugzilla entry , > > http://bugzilla.kernel.org/show_bug.cgi?id=13727 > > Thomas Meyer indicated it was (possibly) the following commit, > > 018e0446890661504783f92388ecce7138c1566d > > I added Jens to the CC .. So thats: commit 018e0446890661504783f92388ecce7138c1566d Author: Jens Axboe Date: Fri Jun 26 16:27:10 2009 +0200 block: get rid of queue-private command filter What this tends to suggest is that the command filter was blocking some type of command sent from user space which is causing the problem, and now we're letting it through. Restoring the command filter will work around the problem, but the root cause should be finding and fixing whatever is issuing the commands in the first place. James -- 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/