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authorChris Mason <chris.mason@oracle.com>2009-10-13 13:29:19 -0400
committerChris Mason <chris.mason@oracle.com>2009-10-13 13:35:12 -0400
commit690587d109ffe19d6743e4cc80c18b0906b7f9ff (patch)
tree788acd32c4ed1463d0166d0c45b233d96bb102e0 /fs/btrfs/transaction.h
parent257c62e1bce03e5b9f3f069fd52ad73a56de71fd (diff)
Btrfs: streamline tree-log btree block writeout
Syncing the tree log is a 3 phase operation. 1) write and wait for all the tree log blocks for a given root. 2) write and wait for all the tree log blocks for the tree of tree log roots. 3) write and wait for the super blocks (barriers here) This isn't as efficient as it could be because there is no requirement to wait for the blocks from step one to hit the disk before we start writing the blocks from step two. This commit changes the sequence so that we don't start waiting until all the tree blocks from both steps one and two have been sent to disk. We do this by breaking up btrfs_write_wait_marked_extents into two functions, which is trivial because it was already broken up into two parts. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
-rw-r--r--fs/btrfs/transaction.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index f68cbbe61e56..d4e3e7a6938c 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -108,5 +108,9 @@ int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
108 struct btrfs_root *root); 108 struct btrfs_root *root);
109int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, 109int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
110 struct extent_io_tree *dirty_pages); 110 struct extent_io_tree *dirty_pages);
111int btrfs_write_marked_extents(struct btrfs_root *root,
112 struct extent_io_tree *dirty_pages);
113int btrfs_wait_marked_extents(struct btrfs_root *root,
114 struct extent_io_tree *dirty_pages);
111int btrfs_transaction_in_commit(struct btrfs_fs_info *info); 115int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
112#endif 116#endif