diff options
| author | Josef Bacik <jbacik@fb.com> | 2018-10-11 15:54:09 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-13 11:12:58 -0800 |
| commit | 3e9205b1d619280c1b7a1348e2e0180b1561a73c (patch) | |
| tree | 6e62895012b4a941ef80173af52d25d75308a5b3 | |
| parent | 171d45102ea88b69e686d95717f29e8fcffe2e1d (diff) | |
btrfs: don't use ctl->free_space for max_extent_size
commit fb5c39d7a887108087de6ff93d3f326b01b4ef41 upstream.
max_extent_size is supposed to be the largest contiguous range for the
space info, and ctl->free_space is the total free space in the block
group. We need to keep track of these separately and _only_ use the
max_free_space if we don't have a max_extent_size, as that means our
original request was too large to search any of the block groups for and
therefore wouldn't have a max_extent_size set.
CC: stable@vger.kernel.org # 4.14+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 67b30cb28660..d753c1b25193 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -7409,6 +7409,7 @@ static noinline int find_free_extent(struct btrfs_fs_info *fs_info, struct btrfs_block_group_cache *block_group = NULL; u64 search_start = 0; u64 max_extent_size = 0; + u64 max_free_space = 0; u64 empty_cluster = 0; struct btrfs_space_info *space_info; int loop = 0; @@ -7704,8 +7705,8 @@ unclustered_alloc: spin_lock(&ctl->tree_lock); if (ctl->free_space < num_bytes + empty_cluster + empty_size) { - if (ctl->free_space > max_extent_size) - max_extent_size = ctl->free_space; + max_free_space = max(max_free_space, + ctl->free_space); spin_unlock(&ctl->tree_lock); goto loop; } @@ -7874,6 +7875,8 @@ loop: } out: if (ret == -ENOSPC) { + if (!max_extent_size) + max_extent_size = max_free_space; spin_lock(&space_info->lock); space_info->max_extent_size = max_extent_size; spin_unlock(&space_info->lock); |