Hi! I met a problem of dm-thin: a thin-pool has no volumes but its nr_free_blocks_data is not zero. I guess the scene of this problem like: a. create a thin volume thin01, size is 10GB; b. write 10GB to thin01; c. create a snapshot thin01-snap, orig is thin01; d. write 10GB to thin01-snap; e. for a data block of thin01-snap, which will be written by user, will experience following steps: 1. alloc a data block m firstly; 2. wirte data to data block m; 3. bio callback and assign data block m to thin01-snap. If power loss happens between step 2 and step 3, data block will not belong to any device but its ref count is not zero. Is it a problem? How to solve this problem? -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
