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SubjectRe: [PATCH] Initialize max_pfn_mapped as initial ident mapping size for x86_64
On 03/05/2012 10:27 PM, Yinghai Lu wrote:
>
>>
>> The early mapping range we can fix, and probably should. Mapping the
>> first 4 GiB is not a lot of memory and makes a much more sensible
>> starting point.
>
> do you mean map the 4G in head_64.S?
>

Yes. It would be better to design the mapping system so that it would
incrementally map everything we need (with page tables allocated out of
the memory already mapped), but that isn't a trivial exercise,
especially with the need to avoid the initramfs, kernel image and
command line and other data elements.

-hpa


--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.



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