From: Milan Broz <mbroz@redhat.com>
Date: Fri, 8 Feb 2008 02:10:27 +0000 (+0000)
Subject: dm: split dm_suspend io_lock hold into two
X-Git-Tag: v2.6.25-rc1~280^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94d6351e147231b2c5a9512d69693ee8ac0c204d;p=pandora-kernel.git

dm: split dm_suspend io_lock hold into two

Change io_locking to allow processing flush in separate thread.

Because we have DMF_BLOCK_IO already set, any possible
new ios are queued in dm_requests now.

In the case of interrupting previous wait there can be more
ios queued (we unlocked io_lock for a while) but this is safe.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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