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Date: Mon, 17 Jan 2005 10:28:13 -0700
From: Scott Long <scottl@freebsd.org>
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cc: freebsd-stable@freebsd.org
Subject: Re: panic: PAE with 16GB ram
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in2 wrote:

> On Mon, Jan 17, 2005 at 11:29:25AM +0800, in2 wrote:
> 
>>Hi,
>>I use Tyan S2882 with dual Opteron and FreeBSD 4.10-RELEASE with
>>PAE support. it works fine with 8GB and 12GB ram, but panics with
>>16GB (with the same kernel) :
> 
> the kernel panics just after booting:
> 

This is a known deficiency in the low-level startup code.  Try editing
/sys/i386/include/pmap.h and doubling or quadroupling the value of
NKPT.

Scott