Here is Donald Buczek's reproducer script. I setup an Ubuntu 20.04 VM with latest linux-image-generic and was able to reproduce it within maybe 10 or 15 minutes. Exactly the same issue.
Filesystem layout built as follows: # assemble raid devices mdadm --create /dev/md0 --level=1 --raid-devices=2 --spare-devices=1 /dev/sda2 /dev/sdb2 /dev/sdc2 mdadm --create /dev/md1 --level=5 --raid-devices=5 /dev/sda3 /dev/sdb3 /dev/sdc3 /dev/sdd3 /dev/sde3 # create PVs, VGs, LVs pvcreate /dev/md1 vgcreate vg1 /dev/md1 lvcreate --name root --extents 100%FREE vg1 # create filesystems mkfs.ext4 /dev/md0 mkfs.ext4 /dev/vg1/root ** Attachment added: "mdhang.sh" https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.11/+bug/1942935/+attachment/5525050/+files/mdhang.sh -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1942935 Title: kernel io hangs during mdcheck/resync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.11/+bug/1942935/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
