diff options
Diffstat (limited to 'fs/btrfs/extent_map.c')
| -rw-r--r-- | fs/btrfs/extent_map.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 28c5e0243adc..7376c0aa2bca 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -661,6 +661,29 @@ int btrfs_add_extent_mapping(struct btrfs_fs_info *fs_info, } /* + * Drop all extent maps from a tree in the fastest possible way, rescheduling + * if needed. This avoids searching the tree, from the root down to the first + * extent map, before each deletion. + */ +static void drop_all_extent_maps_fast(struct extent_map_tree *tree) +{ + write_lock(&tree->lock); + while (!RB_EMPTY_ROOT(&tree->map.rb_root)) { + struct extent_map *em; + struct rb_node *node; + + node = rb_first_cached(&tree->map); + em = rb_entry(node, struct extent_map, rb_node); + clear_bit(EXTENT_FLAG_PINNED, &em->flags); + clear_bit(EXTENT_FLAG_LOGGING, &em->flags); + remove_extent_mapping(tree, em); + free_extent_map(em); + cond_resched_rwlock_write(&tree->lock); + } + write_unlock(&tree->lock); +} + +/* * Drop all extent maps in a given range. * * @inode: The target inode. @@ -685,6 +708,10 @@ void btrfs_drop_extent_map_range(struct btrfs_inode *inode, u64 start, u64 end, WARN_ON(end < start); if (end == (u64)-1) { + if (start == 0 && !skip_pinned) { + drop_all_extent_maps_fast(em_tree); + return; + } len = (u64)-1; testend = false; } |