linux-kernel - Re: xen boot PVH guest with linux 5.6.0-rc4-ish kernel: general protection fault, RIP: 0010:__pv_queued_spin_lock

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Date:   Thu, 5 Mar 2020 11:18:45 +0100
From:   Jürgen Groß <jgross@...e.com>
To:     Sander Eikelenboom <linux@...elenboom.it>
Cc:     "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: xen boot PVH guest with linux 5.6.0-rc4-ish kernel: general
 protection fault, RIP: 0010:__pv_queued_spin_lock_slowpath

On 04.03.20 18:52, Sander Eikelenboom wrote:
> Hi Juergen,
> 
> Just tested a 5.6.0-rc4'ish kernel (8b614cb8f1dcac8ca77cf4dd85f46ef3055f8238, so it includes the xen fixes from x86 trees).
> Xen is the latest xen-unstable, dom0 kernel is 5.5.7.
> 
> During boot of the PVH guest I got the splat below.
> With a 5.5.7 kernel the guest boots fine.

There were 2 bugs. I have sent the patches.

Interesting, though, that you did see only one of them (I hit the
same bug as you did only after fixing the xenbus problem).


Juergen