[13/14] Btrfs: don't bother kicking async if there's nothing to reclaim
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Message ID 1458926760-17563-14-git-send-email-jbacik@fb.com
State Accepted
Headers show

Commit Message

Josef Bacik March 25, 2016, 5:25 p.m. UTC
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 <jbacik@fb.com>
---
 fs/btrfs/extent-tree.c | 3 +++
 1 file changed, 3 insertions(+)

Patch
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diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 273e18d..4b5a517 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4871,6 +4871,9 @@  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));
 }