From e6138876ad8327250d77291b3262fee356267211 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Thu, 27 Sep 2012 17:07:30 -0400 Subject: Btrfs: cache extent state when writing out dirty metadata pages Everytime we write out dirty pages we search for an offset in the tree, convert the bits in the state, and then when we wait we search for the offset again and clear the bits. So for every dirty range in the io tree we are doing 4 rb searches, which is suboptimal. With this patch we are only doing 2 searches for every cycle (modulo weird things happening). Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/tree-log.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/btrfs/tree-log.c') diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 1d7b34844323..f4b9e54b1da2 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2463,7 +2463,8 @@ static void free_log_tree(struct btrfs_trans_handle *trans, while (1) { ret = find_first_extent_bit(&log->dirty_log_pages, - 0, &start, &end, EXTENT_DIRTY | EXTENT_NEW); + 0, &start, &end, EXTENT_DIRTY | EXTENT_NEW, + NULL); if (ret) break; -- cgit v1.2.2