From: Zhao Lei <zhao...@cn.fujitsu.com> space_info's value calculation is some complex and easy to cause bug, add WARN_ON() to help debug.
Changelog v1->v2: Put WARN_ON()s under the ENOSPC_DEBUG mount option. Suggested by: David Sterba <dste...@suse.cz> Signed-off-by: Zhao Lei <zhao...@cn.fujitsu.com> --- fs/btrfs/extent-tree.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index e04ea1f..203ac63 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -9464,9 +9464,19 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, spin_lock(&block_group->space_info->lock); list_del_init(&block_group->ro_list); + + if (btrfs_test_opt(root, ENOSPC_DEBUG)) { + WARN_ON(block_group->space_info->total_bytes + < block_group->key.offset); + WARN_ON(block_group->space_info->bytes_readonly + < block_group->key.offset); + WARN_ON(block_group->space_info->disk_total + < block_group->key.offset * factor); + } block_group->space_info->total_bytes -= block_group->key.offset; block_group->space_info->bytes_readonly -= block_group->key.offset; block_group->space_info->disk_total -= block_group->key.offset * factor; + spin_unlock(&block_group->space_info->lock); memcpy(&key, &block_group->key, sizeof(key)); -- 1.8.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html