tree c0661c3f88978f2049693682f1cb94b20a8454c0
parent dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8
author Mark Fasheh <mark.fasheh@oracle.com> 1169065895 -0800
committer Mark Fasheh <mark.fasheh@oracle.com> 1177624891 -0700

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>