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Chris Mason 6af118ce51 Btrfs: Index extent buffers in an rbtree 
Before, extent buffers were a temporary object, meant to map a number of pages
at once and collect operations on them.

But, a few extra fields have crept in, and they are also the best place to
store a per-tree block lock field as well.  This commit puts the extent
buffers into an rbtree, and ensures a single extent buffer for each
tree block.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
History 2008-09-25 11:04:05 -04:00
fs/btrfs Btrfs: Index extent buffers in an rbtree 2008-09-25 11:04:05 -04:00