cvs commit: src/sys/amd64/amd64 pmap.c

Doug Rabson dfr at nlsystems.com
Fri Jun 20 02:02:31 PDT 2003


On Friday 20 June 2003 1:11 am, Hidetoshi Shimokawa wrote:
> At Thu, 19 Jun 2003 12:02:04 -0700,
>
> Peter Wemm wrote:
> > >   Modified files:
> > >     sys/amd64/amd64      pmap.c
> > >   Log:
> > >   Fix direct map page table for 2GB+ physical memory.
> >
> > Thank you! :-)
> >
> > Cheers,
> > -Peter
>
> Do you have any plan to increase KVA up to 512GB?
> struct vm_page consumes 250MB space for 8GB memory.

Is there a direct-mapped region on amd64? The vm_page arrays come out of 
the direct-mapped regions on alpha and ia64 (don't know about sparc64) 
and this makes a big difference to KVA usage and probably to TLB 
pressure too.

-- 
Doug Rabson				Mail:  dfr at nlsystems.com
					Phone: +44 20 8348 6160




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