Re: Fatal trap 12: page fault on Acer Chromebook 720 (peppy)

From: Konstantin Belousov <kostikbel_at_gmail.com>
Date: Wed, 15 Aug 2018 16:55:31 +0300
On Wed, Aug 15, 2018 at 03:52:37PM +0200, Michael Gmelin wrote:
> 
> 
> > On 15. Aug 2018, at 15:04, Konstantin Belousov <kostikbel_at_gmail.com> wrote:
> > 
> >> On Wed, Aug 15, 2018 at 12:51:06AM +0200, Michael Gmelin wrote:
> >> Reviving this old thread, since I just updated to r337818 and a similar
> >> problem is happening again. Since the fix in r334799 (review
> >> https://reviews.freebsd.org/D15675) (mp_)machdep.c have been touched,
> >> so maybe this is related
> >> (https://svnweb.freebsd.org/base?view=revision&revision=334799).
> >> 
> >> Please see the screenshot of the panic below:
> >> https://gist.github.com/grembo/78d0f2a100dd4f16775b85a118769658
> >> 
> >> This is me not digging any deeper, hoping that this is something
> >> obvious. Please let me know if you need more input.
> > 
> > I do not see how recent mp_machdep.c changes could affect this.
> > Can you try newest kernel but old loader ?
> 
> I will try (but that will take a while). Oh, also, it still boots in save mode/with smp disabled.

Right, this is because the access to that address through DMAP is only 
needed when configuring AP startup resources.

Also, I think it is safe to suggest that the bisect is needed.
Received on Wed Aug 15 2018 - 11:55:43 UTC

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