Subject: Re: next-20081119: general protection fault: get_next_timer_interrupt()

From: [email-masked]
Date: Mon, 24 Nov 2008 16:09:02 -0800

Thomas Gleixner [[email-masked]] wrote:
> On Mon, 24 Nov 2008, Mike Anderson wrote:
> > Thomas Gleixner <[email-masked]> wrote:
> > > Yeah, block could it be as well. Jens, Mike ?
> > 
> > I added a comment to bug 12020 on Thursday about a few other systems that
> > where seeing the signature shown in bug 12020. It appeared from debug that
> > there where a few paths that where adding timers for requests that where
> > not expected.
> > 
> > http://bugzilla.kernel.org/show_bug.cgi?id=12020
> > 
> > It would be good to know if the debug patch below effects your problem as while.
> > 
> > If it does we need to investigated a solution to resolve not adding a
> > timer for these requests.

The block timer code calls del_timer(), should it call del_timer_sync()?
It is possible although unlikely that you are hitting del_timer_sync vs
del_timer problem in the block timeout code. Can only be seen on SMP
systems though!

--Malahal.