From d38b349c39a9feb1aca82c3280b9b1234497d582 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 25 Mar 2016 13:25:59 -0400 Subject: [PATCH] Btrfs: don't bother kicking async if there's nothing to reclaim We do this check when we start the async reclaimer thread, might as well check before we kick it off to save us some cycles. Thanks, Signed-off-by: Josef Bacik Signed-off-by: David Sterba --- fs/btrfs/extent-tree.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a012fd4..a0ca2b5 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4944,6 +4944,9 @@ static inline int need_do_async_reclaim(struct btrfs_space_info *space_info, if ((space_info->bytes_used + space_info->bytes_reserved) >= thresh) return 0; + if (!btrfs_calc_reclaim_metadata_size(fs_info->fs_root, space_info)) + return 0; + return (used >= thresh && !btrfs_fs_closing(fs_info) && !test_bit(BTRFS_FS_STATE_REMOUNTING, &fs_info->fs_state)); } -- 2.7.4