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Diffstat (limited to 'fs/btrfs/dev-replace.c')
| -rw-r--r-- | fs/btrfs/dev-replace.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index f638c458d285..20cf5e95f2bc 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -827,6 +827,14 @@ static void btrfs_dev_replace_update_device_in_mapping_tree( u64 start = 0; int i; + /* + * The chunk mutex must be held so that no new chunks can be created + * while we are updating existing chunks. This guarantees we don't miss + * any new chunk that gets created for a range that falls before the + * range of the last chunk we processed. + */ + lockdep_assert_held(&fs_info->chunk_mutex); + write_lock(&fs_info->mapping_tree_lock); do { struct btrfs_chunk_map *map; @@ -839,6 +847,7 @@ static void btrfs_dev_replace_update_device_in_mapping_tree( map->stripes[i].dev = tgtdev; start = map->start + map->chunk_len; btrfs_free_chunk_map(map); + cond_resched_rwlock_write(&fs_info->mapping_tree_lock); } while (start); write_unlock(&fs_info->mapping_tree_lock); } |