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authorChris Mason <chris.mason@oracle.com>2008-09-11 16:17:57 -0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:07 -0400
commitd0c803c4049c5ca322d4795d8b74f28768603e0e (patch)
treeb4c4f11b2f5938ad183a1771cd0b9e122709e2ff /fs/btrfs/transaction.h
parent31ff1cd25d376e8f499d450de177dffadc9e1c56 (diff)
Btrfs: Record dirty pages tree-log pages in an extent_io tree
This is the same way the transaction code makes sure that all the other tree blocks are safely on disk. There's an extent_io tree for each root, and any blocks allocated to the tree logs are recorded in that tree. At tree-log sync, the extent_io tree is walked to flush down the dirty pages and wait for them. The main benefit is less time spent walking the tree log and skipping clean pages, and getting sequential IO down to the drive. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
-rw-r--r--fs/btrfs/transaction.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index cc63650d60d6..eef2cb7d7e78 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -99,4 +99,6 @@ int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
99 struct btrfs_root *root); 99 struct btrfs_root *root);
100void btrfs_throttle(struct btrfs_root *root); 100void btrfs_throttle(struct btrfs_root *root);
101int btrfs_record_root_in_trans(struct btrfs_root *root); 101int btrfs_record_root_in_trans(struct btrfs_root *root);
102int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
103 struct extent_io_tree *dirty_pages);
102#endif 104#endif