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-rw-r--r--fs/btrfs/free-space-cache.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index aedacdbf77e..6e5b7e46369 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1849,7 +1849,13 @@ again:
info = tree_search_offset(ctl, offset_to_bitmap(ctl, offset),
1, 0);
if (!info) {
- WARN_ON(1);
+ /* the tree logging code might be calling us before we
+ * have fully loaded the free space rbtree for this
+ * block group. So it is possible the entry won't
+ * be in the rbtree yet at all. The caching code
+ * will make sure not to put it in the rbtree if
+ * the logging code has pinned it.
+ */
goto out_lock;
}
}