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H A D | ctree.c | f7c79f30 Mon Mar 19 14:54:38 CDT 2012 Chris Mason <chris.mason@oracle.com> Btrfs: adjust the write_lock_level as we unlock
btrfs_search_slot sometimes needs write locks on high levels of the tree. It remembers the highest level that needs a write lock and will use that for all future searches through the tree in a given call.
But, very often we'll just cow the top level or the level below and we won't really need write locks on the root again after that. This patch changes things to adjust the write lock requirement as it unlocks levels.
Signed-off-by: Chris Mason <chris.mason@oracle.com> f7c79f30 Mon Mar 19 14:54:38 CDT 2012 Chris Mason <chris.mason@oracle.com> Btrfs: adjust the write_lock_level as we unlock btrfs_search_slot sometimes needs write locks on high levels of the tree. It remembers the highest level that needs a write lock and will use that for all future searches through the tree in a given call. But, very often we'll just cow the top level or the level below and we won't really need write locks on the root again after that. This patch changes things to adjust the write lock requirement as it unlocks levels. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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