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Chris Mason a61e6f29dc Btrfs: Use a mutex in the extent buffer for tree block locking 
This replaces the use of the page cache lock bit for locking, which wasn't
suitable for block size < page size and couldn't be used recursively.

The mutexes alone don't fix either problem, but they are the first step.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
History 2008-09-25 11:04:05 -04:00
fs/btrfs Btrfs: Use a mutex in the extent buffer for tree block locking 2008-09-25 11:04:05 -04:00