PAE on -current pitfalls and issues?
peter at wemm.org
Tue Jun 15 20:58:44 GMT 2004
On Tuesday 15 June 2004 05:55 am, Daniel Lang wrote:
> Hi again,
> Daniel Lang wrote on Tue, Jun 15, 2004 at 02:46:05PM +0200:
> > - Do I need to include 'options PAE' somehow into the
> > build of the kernel-modules in order to use them?
> > Or is a pure static kernel the only option?
> I just stumbled across the handbook section about PAE,
> so this says modules are not working. I assume this is
> still the case.
There's a gotcha with KVA_PAGES. On a standard kernel, there are 1024
Page directory slots. By default we use 256 of them for 1 out of 4GB.
On a PAE kernel, there are now 2048 page directory slots. The same 1:3
split requires a default KVA_PAGES of 512. So if you want to increase
KVA beyond the default 1GB, do not forget to take the scaling into
Peter Wemm - peter at wemm.org; peter at FreeBSD.org; peter at yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5
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