[Bug 239245] r350074 will panic on ppc64 PowerMac G5 in vm_phys_enqueue_contig

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239245

--- Comment #30 from Mark Millard <marklmi26-fbsd at yahoo.com> ---
(In reply to Dennis Clarke from comment #27)

> So this is bothersome as it suggests that the native build process on a
> ppc64 boxen is somehow slightly broken?

My suggestion, if you can do it, is to use a:

https://artifact.ci.freebsd.org/snapshot/head/r*/powerpc/powerpc64/

(with r* being after r349846) to establish a working
G5 quad environment, and then see if it can rebuild
itself from scratch and update itself and then boot.

My guess is that it will and that the problem is related
to jumping across some change in an inappropriate way,
not that I know what went wrong for self-hosted.

[I've had a couple of days with FreeBSD activity largely
blocked. It looks like I might have only limited time
for another day or more.]

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