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From: Kyle Evans <kevans@freebsd.org>
Date: Tue, 14 Aug 2018 11:09:38 -0500
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Subject: Re: Panic in efi_get_time() on EPCY system when booting
To: Michael Tuexen <tuexen@freebsd.org>
Cc: FreeBSD Current <freebsd-current@freebsd.org>
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On Tue, Aug 14, 2018 at 11:04 AM, Michael Tuexen <tuexen@freebsd.org> wrote:
> Dear all,
>
> r337761 panics on boot with a GENERIC kernel on a EPYC system:

Oy. =(

> [...]
> panic: mutex pmap not owned at ../../../amd64/amd64/efirt_machdep.c:268
> [...]
>
> Any idea what is wrong?
>

Ah, this should be fixed by https://reviews.freebsd.org/D16618 --
immediate workaround is set efi.rt.disabled=1 in loader.conf(5) or at
loader prompt. Apologies for the hassle.

Thanks,

Kyle Evans