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Date: Wed, 23 Jul 1997 00:18:26 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199707221418.AAA31216@godzilla.zeta.org.au>
To: current@freebsd.org
Subject: more 4MB page bugs
Cc: dyson@freebsd.org
Sender: owner-freebsd-current@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

4MB pages broke gdb -k, at least on panic dumps.

Option DISABLE_PSE can be used to avoid 4MB pages, at least with this
change.

Bruce

diff -c2 pmap.c~ pmap.c
*** pmap.c~	Mon Jul 21 16:40:24 1997
--- pmap.c	Tue Jul 22 19:53:50 1997
***************
*** 253,259 ****
--- 257,265 ----
  pmap_kmem_choose(vm_offset_t addr) {
  	vm_offset_t newaddr = addr;
+ #ifndef DISABLE_PSE
  	if (cpu_feature & CPUID_PSE) {
  		newaddr = (addr + (NBPDR - 1)) & ~(NBPDR - 1);
  	}
+ #endif
  	return newaddr;
  }