Xen 4.12 - systemrescuecd-6.0.3.iso - Baremetal reboots

[Roger Pau Monné]

On Tue, Jul 23, 2019 at 03:45:49PM +0000, R0me0 *** wrote:
> Yes the DOM0, the XEN hypervisor completely hangs and the host
> automatically reboots.

You will have to setup a serial console in order to debug then. You
need to find the serial port of your box and hook a null modem [0] to it,
and then plug the other side into another computer and use cu, minicom
or some other program in order to get the serial output.

There's a section on the handbook about how to use the serial console:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/serialconsole-setup.html

You will need to add something like:

console=com1,vga com1=115200,8n1

to your xen_cmdline if you don't have it yet in order to get the
output.

> It seems related with Linux guests using kernel 4.x

Does then same happen if you use a disk line like:

'format=raw, vdev=hda, access=rw, backendtype=qdisk, target=/dev/zvol/fbroot/SAND/disk'

Note the 'backendtype' option is set to qdisk.

Roger.

[0] https://en.wikipedia.org/wiki/Null_modem