From: Mark Fasheh <mark.fasheh@oracle.com>
Date: Wed, 17 Jan 2007 20:31:35 +0000 (-0800)
Subject: ocfs2: temporarily remove extent map caching
X-Git-Tag: v2.6.22-rc1~1124^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=363041a5f74b953ab6b705ac9c88e5eda218a24b;p=pandora-kernel.git

ocfs2: temporarily remove extent map caching

The code in extent_map.c is not prepared to deal with a subtree being
rotated between lookups. This can happen when filling holes in sparse files.
Instead of a lengthy patch to update the code (which would likely lose the
benefit of caching subtree roots), we remove most of the algorithms and
implement a simple path based lookup. A less ambitious extent caching scheme
will be added in a later patch.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
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