On Tue, Oct 31 2006, Neil Brown wrote:
> On Tuesday October 31, [email protected] wrote:
> > On Tue, Oct 31 2006, Neil Brown wrote:
> > >
> > > I'm guessing we need
> > >
> > > diff .prev/block/elevator.c ./block/elevator.c
> > > --- .prev/block/elevator.c 2006-10-31 20:06:22.000000000 +1100
> > > +++ ./block/elevator.c 2006-10-31 20:06:40.000000000 +1100
> > > @@ -926,7 +926,7 @@ static void __elv_unregister_queue(eleva
> > >
> > > void elv_unregister_queue(struct request_queue *q)
> > > {
> > > - if (q)
> > > + if (q && q->elevator)
> > > __elv_unregister_queue(q->elevator);
> > > }
> > >
> > >
> > > Jens? md never registers and elevator for its queue.
> >
> > Hmm, but blk_unregister_queue() doesn't call elv_unregister_queue()
> > unless q->request_fn is set. And in that case, you must have an io
> > scheduler attached.
>
> Hmm.. yes. Oh, I get it. I have
>
> blk_cleanup_queue(mddev->queue);
> mddev->queue = NULL;
> del_gendisk(mddev->gendisk);
> mddev->gendisk = NULL;
>
> That's the wrong order, isn't it. :-(
Yep, you want to reverse that :-)
--
Jens Axboe
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