From: Amir Goldstein <amir73il@users.sf.net>
Date: Tue, 10 May 2011 01:49:42 +0000 (-0400)
Subject: ext4: teach ext4_mb_init_cache() to skip uptodate buddy caches
X-Git-Tag: v3.0-rc1~140^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b8b7d353f5f9bea758398c3af679ffa105e5cfe;p=pandora-kernel.git

ext4: teach ext4_mb_init_cache() to skip uptodate buddy caches

After online resize which adds new groups, some of the groups
in a buddy page may be initialized and uptodate, while other
(new ones) may be uninitialized.

The indication for init of new block groups is when ext4_mb_init_cache()
is called with an uptodate buddy page. In this case, initialized groups
on that buddy page must be skipped when initializing the buddy cache.

Signed-off-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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