HEADS UP Re: cvs commit: src/sys/conf options.i386 src/sys/i386/i386 bios.c locore.s machdep.c mpboot.s pmap.c vm86bios.s vm_machdep.c src/sys/i386/include _types.h bus_at386.h param.h pmap.

Mike Silbersack silby at silby.com
Sat Mar 29 23:34:52 PST 2003

On Sun, 30 Mar 2003, Jake Burkholder wrote:

> To clarify that the ram above 4G is used for, it just goes into the general
> page pool.  I don't intend to implement a means for user process's to access
> more then their ~2.5G address space through a sliding window as has been done
> on other systems, but this should be quite easy to do should someone be so
> inclined.  To give an example, on a 6G system you see things like this:

Cool, that's much better than the situation was for large ram machines
before. :)

Do these changes allow something like a 3G KVA space without shrinking
processes address spaces?

Also, I'm assuming that PAE can boot on machines with < 4 Gig of ram; can
it also be coaxed into acting in such a manner than busdma is _required_,
so that a 256MB i386 box can be used to see if a driver is busdma

In any case, very cool.

Mike "Silby" Silbersack

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