On Mon, May 8, 2023 at 6:57 AM David Gilmour [off-list ref] wrote:

Ok, well I'm willing to try anything at this point. Do you need
anything from me for a patch? Here is my current kernel details:

grep -i mdadm /etc/udev/rules.d/* /lib/udev/rules.d/*

If you can find a udev rule that starts up the monitor then move that
rule out of the directory, so that on the next assemble try it does
not get started.

If this is the recent bug that is being discussed then anything
accessing the array after the reshape will deadlock the array and the
reshape.