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| author | Chris Mason <chris.mason@oracle.com> | 2008-04-01 11:26:07 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:01 -0400 |
| commit | ecbe2402cb4e4e7413544dc392c1a78d0f290292 (patch) | |
| tree | 87d11983cac8bfef09ba94d69c3d210af0927e2b | |
| parent | 140dfd00ae544cdc0c9951b80ad6df61e62859e2 (diff) | |
Btrfs: Keep fs_mutex during reads done by snapshot deletion
There was an optimization to drop the fs_mutex when doing snapshot deletion
reads, but this can lead to false positives on checksumming errors. Keep
the lock for now.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index c226656f29b..cf283b0271a 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2046,11 +2046,12 @@ static int noinline walk_down_tree(struct btrfs_trans_handle *trans, if (!next || !btrfs_buffer_uptodate(next)) { free_extent_buffer(next); reada_walk_down(root, cur, path->slots[*level]); - mutex_unlock(&root->fs_info->fs_mutex); next = read_tree_block(root, bytenr, blocksize); - mutex_lock(&root->fs_info->fs_mutex); - /* we dropped the lock, check one more time */ + /* we used to drop the lock above, keep the + * code to double check so that we won't forget + * when we drop the lock again in the future + */ ret = lookup_extent_ref(trans, root, bytenr, blocksize, &refs); BUG_ON(ret); |