From: Mikulas Patocka <mpatocka@redhat.com>
Date: Thu, 12 Aug 2010 03:14:26 +0000 (+0100)
Subject: dm stripe: support discards
X-Git-Tag: v2.6.36-rc1~51^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b76ec11fec40203836b488496d2df082d5b2022;p=pandora-kernel.git

dm stripe: support discards

The DM core will submit a discard bio to the stripe target for each
stripe in a striped DM device.  The stripe target will determine
stripe-specific portions of the supplied bio to be remapped into
individual (at most 'num_discard_requests' extents).  If a given
stripe-specific discard bio doesn't touch a particular stripe the bio
will be dropped.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

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