1 files changed, 3 insertions, 6 deletions

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index bda36fef301e..b9019c847c58 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3122,12 +3122,9 @@ static int lock_extent_buffer_for_io(struct extent_buffer *eb,
                 set_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags);
                 spin_unlock(&eb->refs_lock);
                 btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
-                spin_lock(&fs_info->delalloc_lock);
-                if (fs_info->dirty_metadata_bytes >= eb->len)
-                        fs_info->dirty_metadata_bytes -= eb->len;
-                else
-                        WARN_ON(1);
-                spin_unlock(&fs_info->delalloc_lock);
+                __percpu_counter_add(&fs_info->dirty_metadata_bytes,
+                                     -eb->len,
+                                     fs_info->dirty_metadata_batch);
                 ret = 1;
         } else {
                 spin_unlock(&eb->refs_lock);