diff options
Diffstat (limited to 'fs/btrfs/extent_map.c')
| -rw-r--r-- | fs/btrfs/extent_map.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 6fe8b14e11cf..914662428dbd 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -562,17 +562,24 @@ int btrfs_add_extent_mapping(struct extent_map_tree *em_tree, *em_in = existing; ret = 0; } else { + u64 orig_start = em->start; + u64 orig_len = em->len; + /* * The existing extent map is the one nearest to * the [start, start + len) range which overlaps */ ret = merge_extent_mapping(em_tree, existing, em, start); - free_extent_map(existing); if (ret) { free_extent_map(em); *em_in = NULL; + WARN_ONCE(ret, +"unexpected error %d: merge existing(start %llu len %llu) with em(start %llu len %llu)\n", + ret, existing->start, existing->len, + orig_start, orig_len); } + free_extent_map(existing); } } |