Pkg xen devel - Sep 2018 - Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64

On 06/09/2018 18:23, Hans van Kranenburg wrote:
> 
> Anyway, I think the future proof solution here is to have clear
> documentation about how to configure related settings, instead of trying
> to find values that suit all users and that are not ridiculously high.
I just assisted a user in #xen on freenode with this exact issue again.

The user had already experienced three maintenance windows in which it
was tried to upgrade a domU with quite some big sized disks and cpus
from Jessie to Stretch, every time failing again with random symptoms.
Disk doesn't work, network does not ping, and had spent quite some hours
searching for solutions already.

This reminded me of something else... which is better error logging when
the issue happens. This is an upstream thing to fix I guess, if
possible. As soon as there's a useful error message in logging or on the
console of the domU, then the user has something specific to search for
on ze interwebz.

Hans