diff options
| author | Yan, Zheng <zheng.yan@oracle.com> | 2009-11-26 09:31:11 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2009-12-17 12:33:36 -0500 |
| commit | 06b2331f8333ec6edf41662757ce8882cc1747d5 (patch) | |
| tree | 9b8316a84e2cb5fa5ed4d16cdbfecd965ed7870c /fs | |
| parent | 86b9f2eca5e0984145e3c7698a7cd6dd65c2a93f (diff) | |
Btrfs: don't add extent 0 to the free space cache v2
If block group 0 is completely free, btrfs_read_block_groups will
add extent [0, BTRFS_SUPER_INFO_OFFSET) to the free space cache.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 44d7a322ec2..39761ca07f1 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -195,6 +195,14 @@ static int exclude_super_stripes(struct btrfs_root *root, int stripe_len; int i, nr, ret; + if (cache->key.objectid < BTRFS_SUPER_INFO_OFFSET) { + stripe_len = BTRFS_SUPER_INFO_OFFSET - cache->key.objectid; + cache->bytes_super += stripe_len; + ret = add_excluded_extent(root, cache->key.objectid, + stripe_len); + BUG_ON(ret); + } + for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { bytenr = btrfs_sb_offset(i); ret = btrfs_rmap_block(&root->fs_info->mapping_tree, @@ -255,7 +263,7 @@ static u64 add_new_free_space(struct btrfs_block_group_cache *block_group, if (ret) break; - if (extent_start == start) { + if (extent_start <= start) { start = extent_end + 1; } else if (extent_start > start && extent_start < end) { size = extent_start - start; |