From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Bottomley Subject: Re: [BUG] Linux-2.6.31-rc1-git9 Cannot Recognize Empty DVD Media Date: Wed, 08 Jul 2009 16:44:05 +0000 Message-ID: <1247071445.4159.214.camel@mulgrave.site> 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> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: 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 In-Reply-To: <1247069178.5973.6.camel@desktop> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Daniel Walker Cc: Maciej Rutecki , Andrew Morton , Tarkan Erimer , Jens Axboe , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org 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