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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 <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
steinar/wifi_calib_4_9_kernel
Josef Bacik 2016-03-25 13:25:59 -04:00 committed by David Sterba
parent 31bada7c4e
commit d38b349c39
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/extent-tree.c
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@ -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));
}