On 4/28/2010 11:24 PM, Busby wrote: > it seems the vgs suspend because the lvcreate cmd don't unlock the > flock, but why the lvcreating of snapshot lv will be suspended while the > origin is on big data IO? Because when creating a snapshot it tries to flush any dirty buffers so that the origin is in a consistent state at the time the snapshot is created. This is done to minimize the chance that the filesystem on the snapshot will be corrupt. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel