Re: CVS commit: [bouyer-xeni386] src/sys/arch

[Pavel Cahyna <pavel%netbsd.org@localhost>]

On Tue, Jan 22, 2008 at 02:29:12PM +0100, Joerg Sonnenberger wrote:
> On Mon, Jan 21, 2008 at 10:12:38PM +0100, Manuel Bouyer wrote:
> > I think setting it to a smaller value should work. Setting it to something
> > larger than 0xc0000000 will be a real pain to support for PAE.
> > Linux also has the kernel loaded at 0xc0000000, and the PAE support in
> > Xen was really designed for this case.
> 
> Not changing it makes it also a lot easier to enable PAE by default.
> That's desirable to be able to use syscall for example.

Changing KERNBASE (downwards) is the official workaround for buffer cache
issues on machines with large RAM (that is machines which could benefit
from PAE).

Pavel