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SubjectRe: 2.6.16-mm1
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.

Interestingly after this happens, the system remains at a pretty high
level of functioning, and further mounts and unmounts and ejects of the
ipod do not cause another oops.

On Thu, 03/23/06 at 18:58:10 -0800, Andrew Morton wrote:
> Brandon Low <lostlogic@lostlogicx.com> wrote:
> >
> > On Thu, 03/23/06 at 18:24:11 -0800, Andrew Morton wrote:
> > > Brandon Low <lostlogic@lostlogicx.com> wrote:
> > > >
> > > > I'm getting a repeatable oops regardless of io scheduler (it looks like
> > > > it's in cfq code so I first tried changing schedulers) on USB
> > > > disconnect.
> > > >
> > > OK, thanks. There have been some recent changes affecting iosched context
> > > lifetime management, which might be causing this.
> > >
> > > If you have time, it'd be useful if you could retest with
> > > ftp://ftp.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.16-git6.gz -
> > > that'll tell us whether it's that code or if it's something which is only
> > > in -mm.
> >
> > Unable to reproduce with identical steps on git6.
>
> ok..
>
> I tried various combinations of plugging, mounting, unmounting and
> unplugging a USB memory stick. No problems.
>
> Can you prepare a step-by-step guide to making this happen?
>
> Thanks.
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