From: Alasdair G Kergon <agk@redhat.com>
To: Neil Brown <neilb@suse.de>
Cc: device-mapper development <dm-devel@redhat.com>,
Ken Milmore <ken.milmore@googlemail.com>,
linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
Jens Axboe <jens.axboe@oracle.com>,
Mikulas Patocka <mpatocka@redhat.com>
Subject: Re: [dm-devel] Re: Write barriers on MD RAID1
Date: Wed, 24 Jun 2009 08:09:17 +0100 [thread overview]
Message-ID: <20090624070917.GB27500@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <19009.41191.662901.179565@notabene.brown>
On Wed, Jun 24, 2009 at 01:43:35PM +1000, Neil Brown wrote:
> Since this test was added, barriers have not worked on md, and (I
> think) dm and similar devices that don't use __make_request and so
> don't bother to set next_ordered.
In dm, we added this:
+ blk_queue_ordered(md->queue, QUEUE_ORDERED_DRAIN, NULL);
Alasdair
next prev parent reply other threads:[~2009-06-24 7:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-23 23:54 Ken Milmore
2009-05-24 1:51 ` NeilBrown
2009-06-21 13:57 ` Ken Milmore
2009-06-24 3:43 ` Neil Brown
2009-06-24 7:09 ` Alasdair G Kergon [this message]
2009-06-24 7:34 ` [dm-devel] " NeilBrown
2009-06-24 7:38 ` Jens Axboe
2009-06-24 9:28 ` Neil Brown
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