Memory Page Fault

[Chris Rothrock]

The build timeframe was less than a month before the 17.08 Genode was
released.  I was using the 17.05 build which still used the previous NOVA
version since NOVA was also updated to v7 when Genode 17.08 was released.

I know I can (and have) re-downloaded the 17.05 Genode but is there a
possibility of doing the prepare_port from an earlier version of a port
(such as NOVA) so that I can reproduce the build that did work?  When I use
the 17.05 and prepare the port, it pulls the newest NOVA and this version
actually doesn't work with the older Genode source code.

On Thu, May 31, 2018 at 10:57 AM, Christian Helmuth <
christian.helmuth at genode-labs.com> wrote:

> Hello Chris,
>
> On Wed, May 30, 2018 at 12:11:03PM -0400, Chris Rothrock wrote:
> > Working with our developers for SABLE, we branched a build of SABLE for
> one
> > purpose - to NOT run the AMD skinit instruction before handing off boot
> to
> > NOVA/Genode.  Using this build of SABLE we are able to get a successful
> > boot to the demo.
> >
> > At this stage, it seems that something fundamental changed within Genode
> > and/or NOVA (and I have also seen this with Genode/seL4 demo) that causes
> > the memory fault to occur on AMD platforms ONLY when the skinit
> instruction
> > is performed prior to boot hand-off.  Is this a point where we can dig a
> > little deeper to understand where this problem is occurring?
>
> Your issue description suggests you have the perfect "git bisect"
> situation: an old source-code revision where it seems to work and a
> new revision that shows an issue. Therefore, I recommend you try to
> narrow down the time frame where the issue appears first by testing
> different revisions of Genode with a minimalistic scenario like "make
> run/log".
>
> From our side I can't promise any practical contribution as the
> current release works pretty stable on our test hardware (admittedly
> Intel not AMD) and we don't have access to SABLE.
>
> Regards
> --
> Christian Helmuth
> Genode Labs
>
> https://www.genode-labs.com/ · https://genode.org/
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-- 


Thank You,

Chris Rothrock
Senior System Administrator
(315) 308-1637
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