From: Mark McLoughlin <markmc@redhat.com>
Date: Tue, 3 Oct 2006 08:15:27 +0000 (-0700)
Subject: [PATCH] dm snapshot: fix metadata writing when suspending
X-Git-Tag: v2.6.19-rc1~273
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=927ffe7c9a156e259aae31c07dd76072c459ec57;p=pandora-kernel.git

[PATCH] dm snapshot: fix metadata writing when suspending

When suspending a device-mapper device, dm_suspend() sleeps until all
necessary I/O is completed.  This state is triggered by a callback from
persistent_commit().  But some I/O can still be issued *after* the callback
(to prepare the next metadata area for use if the current one is full).  This
patch delays the callback until after that I/O is complete.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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