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From:
Brent Cook <busterb@gmail.com>
Subject:
Re: Sysupgrade on i386 vmm to current snapshot hangs on boot into upgrade kernel
To:
Thomas de Grivel <thodg@kmx.io>
Cc:
Alexander Bluhm <bluhm@openbsd.org>, OpenBSD technical list <tech@openbsd.org>
Date:
Thu, 26 Mar 2026 11:20:14 -0500

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On Thu, Mar 26, 2026 at 8:35 AM Thomas de Grivel <thodg@kmx.io> wrote:

> I could not boot OpenBSD i386 on an amd64 VM, how did you do ?
>

I mostly just followed the FAQ VMM guide. It was a bit of a struggle
getting the networking correct. I had some non-typical routing on my host
box, and it made the NAT recipe not work initially.


>
> On Thu, Mar 26, 2026 at 2:18 PM Alexander Bluhm <bluhm@openbsd.org> wrote:
> >
> > On Thu, Mar 26, 2026 at 12:42:41AM -0500, Brent Cook wrote:
> > > I was trying to sysupgrade -s a 7.8 VMM machine to a 7.9 snapshot, but
> the
> > > upgrade hangs on boot, and am not quite sure how to proceed.  Is this
> > > something that should work?
> > >
> > > I can reset the machine and it comes back fine with the old kernel
> again.
> > > The host machine is already running a 6.9 snapshot from this week.
> >
> > Running OpenBSD i386 as guest in vmm/vmd is quite broken.  Sometimes
> > it hangs durign boot soemwhere at "scsibus1 at softraid0: 256
> > targets".  But the hang happens not reliably, sometimes the machine
> > is runnig fine.  This makes tracking the bug down difficult.
> >
> > We made some experiments with various versions of the host system
> > and the bug is present at least since OpenBSD 7.4.
> >
> > bluhm
>
>
That's good to know, that matches what I'm seeing. It is definitely hanging
reliably at least with the small/install kernel, so I might be able to
bisect where it's stuck.