Subject: Re: savecore_flags="-z"
To: Jonathan Stone <jonathan@DSG.Stanford.EDU>
From: Jason Thorpe <>
List: tech-kern
Date: 12/02/1999 14:35:27
On Thu, 02 Dec 1999 14:25:18 -0800 
 Jonathan Stone <jonathan@DSG.Stanford.EDU> wrote:

 > Let me try asking another way, then.  Suppose we wanted to support
 > this (as Eduardo implied Sun does).  Is it just a question of
 > supporting the PTE format in the i386 pmap, or are there other things
 > that'd break-- like, say, the kernel assuming it can simultaneously
 > map all of one user virtual-address space, plus all of physical
 > memory?

The i386 port does not assume it can map all of physical memory at once.

 > Does NetBSD already support phyical memory > max process virtual
 > address space on non-x86 hardware, like the Sun hardware Eduardo
 > mentioned, where the kernel can't map all of physical memory (or was
 > that a Solaris kernel?)

Dunno.  Though, I would assume that e.g. the SPARC pmap can cope with
it, considering that it already has to use > 32-bit physical space just
to access e.g. Sbus and on-board devices...

        -- Jason R. Thorpe <>