Hi I found one bug in the userspace code --- start merging, then from the other console deactivate the origin volume with lvchange -an, then wait next 15 seconds for the next poll interval: the poll process will think that the merging finished, removing the snapshot, leaving partially merged origin and causing data corruption: [slunicko:~]# lvconvert -M vg1/lv2_snap1 Merging of volume lv2_snap1 started. lv2: Merged: 13.1% ( .... deactivate the volume from the other console ....) lv2: Merged: -1.0% Merge into logical volume lv2 finished. Logical volume "snapshot4" successfully removed Maybe this bug was in my code too, I don't remember. Otherwise, the code seems stable, I didn't see anything wrong, I tried to crash it while merging and it resumed without data corruption. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
