Date: Fri, 24 Mar 2006 10:33:01 -0800
From: Andrew Morton <akpm@osdl.org>
To: Brandon Low <lostlogic@lostlogicx.com>
Cc: linux-kernel@vger.kernel.org, Jens Axboe <axboe@suse.de>
Subject: Re: 2.6.16-mm1
Message-Id: <20060324103301.4e6c5a4b.akpm@osdl.org>
In-Reply-To: <20060324125817.GB3381@lostlogicx.com>
References: <20060323014046.2ca1d9df.akpm@osdl.org>
	<20060324021729.GL27559@lostlogicx.com>
	<20060323182411.7f80b4a6.akpm@osdl.org>
	<20060324024540.GM27559@lostlogicx.com>
	<20060323185810.3bf2a4ce.akpm@osdl.org>
	<20060324032126.GN27559@lostlogicx.com>
	<20060324033934.161302c1.akpm@osdl.org>
	<20060324125817.GB3381@lostlogicx.com>
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Brandon Low <lostlogic@lostlogicx.com> wrote:
>
> On Fri, 03/24/06 at 03:39:34 -0800, Andrew Morton wrote:
> > Brandon Low <lostlogic@lostlogicx.com> wrote:
> > >
> > >  I hadn't noticed immediately in the ooops, but it is something to do
> > >  with the Hardware Abstraction Layer Daemon from http://freedesktop.org/Software/hal
> > >  I can't reproduce it without that daemon loaded either.  I wonder if the
> > >  last accessed sysfs file mentioned in the oops (sda/size) is relevent
> > >  also.
> > > 
> > >  My exact steps (with hald loaded) are:
> > >  plug in ipod
> > >  mount /mnt/ipod
> > >  unzip -d /mnt/ipod rockbox.zip
> > >  eject /dev/sda
> > >  unplug ipod
> > >  immediately here, the oops prints.
> > 
> > Still no joy, alas.
> > 
> > git-cfq.patch plays with the elevator exit code for all IO schedulers. 
> > Would you be able to do
> > 
> > wget ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.16/2.6.16-mm1/broken-out/git-cfq.patch
> > patch -p1 -R < git-cfq.patch
> > 
> > and retest?
> > 
> > Thanks.
> 
> It is definitely this patch.  Identical steps (also used an untainted
> kernel for both tests) on -mm1 with and without that patch, and when the
> patch is reversed, I cannot cause the oops.  I booted into single user
> mode (to dodge tainting and any other weirdness), started the dbus
> system message daemon and hald (which depends on dbus), then performed
> the steps mentioned above.
> 

Great.  Thanks for working that out.  It's time to add the dreaded Cc.
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