diff options
| -rw-r--r-- | fs/btrfs/free-space-cache.c | 53 |
1 files changed, 33 insertions, 20 deletions
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index 81d9fe33672f..f2a6dd033623 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -48,6 +48,25 @@ static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl, struct btrfs_free_space *info, u64 offset, u64 bytes, bool update_stats); +static void __btrfs_remove_free_space_cache_locked( + struct btrfs_free_space_ctl *ctl) +{ + struct btrfs_free_space *info; + struct rb_node *node; + + while ((node = rb_last(&ctl->free_space_offset)) != NULL) { + info = rb_entry(node, struct btrfs_free_space, offset_index); + if (!info->bitmap) { + unlink_free_space(ctl, info, true); + kmem_cache_free(btrfs_free_space_cachep, info); + } else { + free_bitmap(ctl, info); + } + + cond_resched_lock(&ctl->tree_lock); + } +} + static struct inode *__lookup_free_space_inode(struct btrfs_root *root, struct btrfs_path *path, u64 offset) @@ -878,7 +897,14 @@ out: return ret; free_cache: io_ctl_drop_pages(&io_ctl); - __btrfs_remove_free_space_cache(ctl); + + /* + * We need to call the _locked variant so we don't try to update the + * discard counters. + */ + spin_lock(&ctl->tree_lock); + __btrfs_remove_free_space_cache_locked(ctl); + spin_unlock(&ctl->tree_lock); goto out; } @@ -1014,7 +1040,13 @@ int load_free_space_cache(struct btrfs_block_group *block_group) if (ret == 0) ret = 1; } else { + /* + * We need to call the _locked variant so we don't try to update + * the discard counters. + */ + spin_lock(&tmp_ctl.tree_lock); __btrfs_remove_free_space_cache(&tmp_ctl); + spin_unlock(&tmp_ctl.tree_lock); btrfs_warn(fs_info, "block group %llu has wrong amount of free space", block_group->start); @@ -2978,25 +3010,6 @@ static void __btrfs_return_cluster_to_free_space( btrfs_put_block_group(block_group); } -static void __btrfs_remove_free_space_cache_locked( - struct btrfs_free_space_ctl *ctl) -{ - struct btrfs_free_space *info; - struct rb_node *node; - - while ((node = rb_last(&ctl->free_space_offset)) != NULL) { - info = rb_entry(node, struct btrfs_free_space, offset_index); - if (!info->bitmap) { - unlink_free_space(ctl, info, true); - kmem_cache_free(btrfs_free_space_cachep, info); - } else { - free_bitmap(ctl, info); - } - - cond_resched_lock(&ctl->tree_lock); - } -} - void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl) { spin_lock(&ctl->tree_lock); |