Re: PAE code ?

[Stephen Borrill <netbsd%precedence.co.uk@localhost>]

On Tue, 11 Oct 2011, Michael C. Vergallen wrote:
> On 10/11/2011 01:07 AM, Jean-Yves Migeon wrote:
> > On 11.10.2011 00:19, Michael C. Vergallen wrote:
> > > Hi,
> > >
> > > Anyone got the PAE code working under the netbsd-5.1.0_PATCH kernel ? I
> > > would like to use it on a HP-DL580-G2 with 8 GB Ram and 4 cpu's but the
> > > compile stops at the x86 code.
> >
> > I am not sure that the PAE code has been backported to NetBSD-5. It 
> > requires a couple of changes in x86 kernel code, especially for MP systems. 
> > The changes are intrusive to x86 virtual memory code, making the overall 
> > thing very unlikely for a backport.
>
> Strange that the option is available in the 5.1 kernel source-code.

It's in there for use by the XEN3 dom0/domU kernels - it was a necessity 
as Xen 3.3 and later dropped support for non-PAE kernels. The 
functionality doesn't extend to generic (or should that be GENERIC!) 
i386 usage.

ISTR there were some patches floating around from jmorse@ for netbsd-5, 
but as jym says above, he himself made many, many big changes before 
committing to -current. So I'm not aware of any usable backport to 
netbsd-5.

--
Stephen