From 824366177aa108eb7b778dc67e4f38b9e01df93f Mon Sep 17 00:00:00 2001 From: Miao Xie Date: Wed, 15 May 2013 07:48:28 +0000 Subject: [PATCH] Btrfs: don't flush the delalloc inodes in the while loop if flushoncommit is set It is unnecessary to flush the delalloc inodes again and again because we don't care the dirty pages which are introduced after the flush, and they will be flush in the transaction commit. Signed-off-by: Miao Xie Signed-off-by: Josef Bacik --- fs/btrfs/transaction.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index fd319b2..265db57 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1518,16 +1518,8 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans, static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans, struct btrfs_root *root) { - int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT); int ret; - if (flush_on_commit) { - ret = btrfs_start_all_delalloc_inodes(root->fs_info, 1); - if (ret) - return ret; - btrfs_wait_all_ordered_extents(root->fs_info, 1); - } - ret = btrfs_run_delayed_items(trans, root); if (ret) return ret; @@ -1551,6 +1543,19 @@ static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans, return ret; } +static inline int btrfs_start_delalloc_flush(struct btrfs_fs_info *fs_info) +{ + if (btrfs_test_opt(fs_info->tree_root, FLUSHONCOMMIT)) + return btrfs_start_all_delalloc_inodes(fs_info, 1); + return 0; +} + +static inline void btrfs_wait_delalloc_flush(struct btrfs_fs_info *fs_info) +{ + if (btrfs_test_opt(fs_info->tree_root, FLUSHONCOMMIT)) + btrfs_wait_all_ordered_extents(fs_info, 1); +} + /* * btrfs_transaction state sequence: * in_commit = 0, blocked = 0 (initial) @@ -1654,6 +1659,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, extwriter_counter_dec(cur_trans, trans->type); + ret = btrfs_start_delalloc_flush(root->fs_info); + if (ret) + goto cleanup_transaction; + if (!btrfs_test_opt(root, SSD) && (now < cur_trans->start_time || now - cur_trans->start_time < 1)) should_grow = 1; @@ -1683,6 +1692,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, if (ret) goto cleanup_transaction; + btrfs_wait_delalloc_flush(root->fs_info); /* * Ok now we need to make sure to block out any other joins while we * commit the transaction. We could have started a join before setting -- 2.7.4