Re: HIGH MEMORY access

From: david parsons (orc@pell.portland.or.us)
Date: Fri Mar 03 2000 - 13:31:44 EST


> > >> From: Manfred Spraul [mailto:manfreds@colorfullife.com]

> > >> * max_pfn is set to the end if the last usable block.
> > >> * then the ACPI tables follow --> they are behind max_pfn -->
> > >> behind the
> > >> end of mem_map.

> > <nathan.zook@amd.com> wrote:
> > >This is changing. The new patches will be reclaim-enabled, so
> > >those pages will be mapped, and the max_pfn-class variables will
> > >reflect their presence.
 
> > From: orc@pell.portland.or.us [mailto:orc@pell.portland.or.us]
> > Only if these pages are set as acpi reclaim memory; if they're
> > marked as nvs and happen to be above the last ram section, max_pfn
> > won't catch them.

nathan.zook@amd.com wrote:
 
> Marking them NVS is an error, but I've been leaning towards mapping the NVS
> pages anyway.

    Though if you find a bios that stuffs the nvs pages up near the top of
    4gb, won't that make mem_map[] very large and thus potentially take
    all memory away from low-memory systems?
    
                  ____
    david parsons \bi/ Spoiled by Award bioses that tuck acpi memory at the
                   \/ top of physical memory and just put miscellaneous
                                             rom sections at the top of 4gb.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Tue Mar 07 2000 - 21:00:15 EST