From: Jens Axboe <jens.axboe@oracle.com>
To: Neil Brown <neilb@suse.de>
Cc: Andrew Morton <akpm@osdl.org>,
linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
gregkh@suse.de
Subject: Re: [PATCH 002 of 6] md: Change lifetime rules for 'md' devices.
Date: Tue, 31 Oct 2006 10:30:17 +0100 [thread overview]
Message-ID: <20061031093016.GE14055@kernel.dk> (raw)
In-Reply-To: <17735.5821.446351.439032@cse.unsw.edu.au>
On Tue, Oct 31 2006, Neil Brown wrote:
> On Tuesday October 31, jens.axboe@oracle.com 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
next prev parent reply other threads:[~2006-10-31 9:30 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-31 6:00 [PATCH 000 of 6] md: udev events and cache bypass for reads NeilBrown
2006-10-31 6:00 ` [PATCH 001 of 6] md: Send online/offline uevents when an md array starts/stops NeilBrown
2006-10-31 21:16 ` Greg KH
2006-11-02 12:13 ` Kay Sievers
2006-11-02 12:32 ` Neil Brown
2006-11-02 13:51 ` Kay Sievers
2006-11-03 6:57 ` Neil Brown
2006-11-03 8:22 ` Kay Sievers
2006-11-06 0:18 ` Neil Brown
2006-11-06 8:38 ` dean gaudet
2006-11-07 5:05 ` Neil Brown
2006-11-09 10:10 ` Michael Tokarev
2006-11-09 10:17 ` Michael Tokarev
2006-11-08 11:14 ` Kay Sievers
2006-11-09 0:17 ` Neil Brown
2006-10-31 6:00 ` [PATCH 002 of 6] md: Change lifetime rules for 'md' devices NeilBrown
2006-10-31 8:22 ` Andrew Morton
2006-10-31 9:09 ` Neil Brown
2006-10-31 9:15 ` Jens Axboe
2006-10-31 9:26 ` Neil Brown
2006-10-31 9:30 ` Jens Axboe [this message]
2006-10-31 6:00 ` [PATCH 003 of 6] md: Define raid5_mergeable_bvec NeilBrown
2006-10-31 6:01 ` [PATCH 004 of 6] md: Handle bypassing the read cache (assuming nothing fails) NeilBrown
2006-10-31 6:01 ` [PATCH 005 of 6] md: Allow reads that have bypassed the cache to be retried on failure NeilBrown
2006-10-31 6:01 ` [PATCH 006 of 6] md: Enable bypassing cache for reads NeilBrown
2006-10-31 21:15 ` [PATCH 000 of 6] md: udev events and cache bypass " Greg KH
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