linux-kernel - Re: Linux 3.0 oopses when pulling a USB CDROM

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Date:	Sat, 02 Jul 2011 12:09:26 -0500
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Dave Jones <davej@...hat.com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, axboe@...nel.dk, rjw@...k.pl,
	linux-usb@...r.kernel.org
Subject: Re: Linux 3.0 oopses when pulling a USB CDROM

On Sat, 2011-07-02 at 19:05 +0200, Andi Kleen wrote:
> > Which goes from the device unplug to the oops.  However, there are puts
> > missing from this; particularly the one where the reference goes to
> > zero.
> 
> The count was always one off because it dumps it before the actual
> put.

I know this.  What I mean is the last seen put count before the oops is
3 (not 1).

And the transition after unplug goes

13->12->10->8->7->6->5->3

implying we're missing put events.

James


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