AMD64 VM panic with >8 GB memory

Steve Kargl sgk at troutmask.apl.washington.edu
Mon Sep 13 11:53:04 PDT 2004


On Mon, Aug 23, 2004 at 07:08:32PM -0700, Steve Kargl wrote:
> On Mon, Aug 23, 2004 at 07:01:13PM -0700, Peter Wemm wrote:
> > On Monday 23 August 2004 04:06 pm, Steve Kargl wrote:
> > > Some relevant info.  The motherboard is a Tyan K8S Pro
> > > (S2882) with 12 GB of PC2700 ECC memory.  If I limit
> > > the memory by setting 'hw.physmem="8G"' in the loader
> > > or in /boot/loader.conf, then the system boots fine.
> > > Any other setting above 8G will result in the above panic.
> > >
> > > The panic occurs too earlier to get a crash dump.
> > > However, I'm will to try any patch or settings.
> > 
> > Hmm.  I think we had an amd64 machine around somewhere at work that had 
> > 16G of ram.  I'll ask what happened to it and see if it can be 
> > recovered to sort this out.
> > 
> 
> Thanks for looking into this.  I can test any patches
> you devise.  I also suspect that this problem is
> RELENG_5.
> 

Peter,

Have you had a chance to investigate this panic.  I had
hoped that scottl's recent commit to pmap.c would fix the
problem, but still get this panic.

-- 
Steve


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