Chris Mason f9efa9c784 Btrfs: Reduce contention on the root node ... This calls unlock_up sooner in btrfs_search_slot in order to decrease the amount of work done with the higher level tree locks held. Also, it changes btrfs_tree_lock to spin for a big against the page lock before scheduling. This makes a big difference in context switch rate under highly contended workloads. Longer term, a better locking structure is needed than the page lock. Signed-off-by: Chris Mason <chris.mason@oracle.com>		2008-09-25 11:04:04 -04:00
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btrfs	Btrfs: Reduce contention on the root node	2008-09-25 11:04:04 -04:00