Re: 2.5.64-mm6: oops in elv_remove_request

From: Jens Axboe (axboe@suse.de)
Date: Sat Mar 15 2003 - 03:15:11 EST

On Fri, Mar 14 2003, Jeremy Fitzhardinge wrote:
> On Fri, 2003-03-14 at 12:33, Jens Axboe wrote:
> > On Fri, Mar 14 2003, Jeremy Fitzhardinge wrote:
> > > With the version or cdrtools I compiled, I get an instant oops+lockup
> > > with the above command when running with anticipatory scheduler in
> > > 2.5.64-mm6 (hand written):
> > >
> > > elv_remove_request
> > > ide_end_request
> > > cdrom_end_request
> > > cdrom_decode_status
> > > cdrom_newpc_intr
> >
> >
> > --- drivers/block/as-iosched.c~ 2003-03-14 21:32:14.000000000 +0100
> > +++ drivers/block/as-iosched.c 2003-03-14 21:32:38.000000000 +0100
> > @@ -1341,6 +1341,8 @@
> > insert_here = ad->dispatch->prev;
> >
> > list_add(&rq->queuelist, insert_here);
> > + if (arq)
> > + RB_CLEAR(&arq->rb_node);
> >
> > if (!list_empty(ad->dispatch) && rq_data_dir(rq) == READ
> > && (ad->antic_status == ANTIC_WAIT_REQ
>
> No joy, I'm afraid. Same crash.

Too bad, then there are two bugs in there :/ 

-- 
Jens Axboe

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