As expected, it's easy enough to repro with raw dm_snapshot: root@bug-1894780-focal-3:~# for f in base snap1 snap2; do dd if=/dev/zero of=$f.img bs=1M count=1 seek=512; done root@bug-1894780-focal-3:~# losetup -f base.img root@bug-1894780-focal-3:~# losetup -f snap1.img root@bug-1894780-focal-3:~# losetup -f snap2.img root@bug-1894780-focal-3:~# dmsetup create snap-base --table "0 524288 snapshot-origin /dev/loop3" root@bug-1894780-focal-3:~# for i in 4 5; do dmsetup create snap-$i --table "0 524288 snapshot /dev/mapper/snap-base /dev/loop$i P 16" & done
It works fine once you sneak a "sleep 1" into the loop. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894780 Title: Oops and hang when starting LVM snapshots on 5.4.0-47 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1894780/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
