From: Chris Mason <chris.mason@oracle.com>
Date: Mon, 4 Aug 2008 12:20:15 +0000 (-0400)
Subject: Btrfs: More throttle tuning
X-Git-Tag: v2.6.29-rc1~27^2~9^2~55^2~56^2~30^2~72
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2dd3e67b1eaec8504da7e12b8afee77323a49f38;p=pandora-kernel.git

Btrfs: More throttle tuning

* Make walk_down_tree wake up throttled tasks more often
* Make walk_down_tree call cond_resched during long loops
* As the size of the ref cache grows, wait longer in throttle
* Get rid of the reada code in walk_down_tree, the leaves don't get
  read anymore, thanks to the ref cache.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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