From: Tejun Heo <tj@kernel.org>
Date: Tue, 20 Jul 2010 20:09:02 +0000 (+0200)
Subject: gfs2: use workqueue instead of slow-work
X-Git-Tag: v2.6.36-rc1~506^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ecd7c2dd9f5dd4f6e8f65c8027159f9c73b0e4c;p=pandora-kernel.git

gfs2: use workqueue instead of slow-work

Workqueue can now handle high concurrency.  Convert gfs to use
workqueue instead of slow-work.

* Steven pointed out that recovery path might be run from allocation
  path and thus requires forward progress guarantee without memory
  allocation.  Create and use gfs_recovery_wq with rescuer.  Please
  note that forward progress wasn't guaranteed with slow-work.

* Updated to use non-reentrant workqueue.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
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