diff options
| -rw-r--r-- | fs/btrfs/extent_io.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 0d931b143c00..654ed3de0054 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1066,13 +1066,21 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int err = 0; u64 last_start; u64 last_end; + bool first_iteration = true; btrfs_debug_check_extent_io_range(tree, start, end); again: if (!prealloc && (mask & __GFP_WAIT)) { + /* + * Best effort, don't worry if extent state allocation fails + * here for the first iteration. We might have a cached state + * that matches exactly the target range, in which case no + * extent state allocations are needed. We'll only know this + * after locking the tree. + */ prealloc = alloc_extent_state(mask); - if (!prealloc) + if (!prealloc && !first_iteration) return -ENOMEM; } @@ -1242,6 +1250,7 @@ search_again: spin_unlock(&tree->lock); if (mask & __GFP_WAIT) cond_resched(); + first_iteration = false; goto again; } |