Btrfs: record first logical byte in memory

This'd save us a rbtree search which may become expensive in large filesystem. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2012-12-27 09:01:23 +00:00
parent 39f9d028c9
commit a1897fddd2
3 changed files with 20 additions and 1 deletions
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1250,6 +1250,7 @@ struct btrfs_fs_info {

 	/* block group cache stuff */
 	spinlock_t block_group_cache_lock;
+	u64 first_logical_byte;
 	struct rb_root block_group_cache_tree;

 	/* keep track of unallocated space */