From: Mikulas Patocka <mpatocka@redhat.com>
Date: Thu, 10 Dec 2009 23:52:33 +0000 (+0000)
Subject: dm snapshot: delay merging a chunk until writes to it complete
X-Git-Tag: v2.6.33-rc1~75^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=17aa03326d40614db94bc51fbbc92df628a5c97c;p=pandora-kernel.git

dm snapshot: delay merging a chunk until writes to it complete

Track writes to chunks that are currently being merged and delay merging
a chunk until all writes to that chunk finish.

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