From 925baeddc5b0764a53f2214a1253251bab0e0324 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Wed, 25 Jun 2008 16:01:30 -0400 Subject: Btrfs: Start btree concurrency work. The allocation trees and the chunk trees are serialized via their own dedicated mutexes. This means allocation location is still not very fine grained. The main FS btree is protected by locks on each block in the btree. Locks are taken top / down, and as processing finishes on a given level of the tree, the lock is released after locking the lower level. The end result of a search is now a path where only the lowest level is locked. Releasing or freeing the path drops any locks held. Signed-off-by: Chris Mason --- fs/btrfs/tree-defrag.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/btrfs/tree-defrag.c') diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c index 155961c7b4d..fab851d8538 100644 --- a/fs/btrfs/tree-defrag.c +++ b/fs/btrfs/tree-defrag.c @@ -181,6 +181,8 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, if (root->fs_info->extent_root == root) is_extent = 1; + goto out; + if (root->ref_cows == 0 && !is_extent) goto out; -- cgit v1.2.3