From: Hannes Reinecke <hare@suse.de>
To: device-mapper development <dm-devel@redhat.com>
Subject: Discard support for dm-snap
Date: Thu, 02 Sep 2010 10:05:54 +0200 [thread overview]
Message-ID: <4C7F5AE2.9020908@suse.de> (raw)
Hi all,
now that we've got discard support in the block layer, are there plans
to update dm-snap to actually implement discard?
Looks like a valid addendum here; we could be freeing up unused blocks
thus freeing up space.
Especially helpful when using dm-snap to create a sparse device;
cf
http://www.mjmwired.net/kernel/Documentation/device-mapper/zero.txt
Thoughts?
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@suse.de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)
next reply other threads:[~2010-09-02 8:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-02 8:05 Hannes Reinecke [this message]
2010-09-02 14:14 ` Discard support for dm-snap Mike Snitzer
2010-09-02 18:21 ` Douglas McClendon
2010-09-03 5:45 ` Hannes Reinecke
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