* Joerg Roedel (jroedel@suse.de) wrote:

On Mon, Nov 15, 2021 at 03:33:03PM +0000, Dr. David Alan Gilbert wrote:

quoted

How would you debug an unexpected access by the host kernel using a
guests kdump?

The host needs to log the access in some way (trace-event, pr_err) with
relevant information.

Yeh OK that makes sense if the host-owner could then enable some type of
debugging based on that event for the unfortunate guest owner.

And with the guest-side kdump you can rule out that it was a guest bug
which triggered the access. And you learn what the guest was trying to
do when it triggered the access. This also helps finding the issue on
the host side (if it is a host-side issue).

(Guest and host owner need to work together for debugging, of course).

Yeh.

Dave

Regards,

-- 
Jörg Rödel
jroedel@suse.de

SUSE Software Solutions Germany GmbH
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-- 
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK