Bona Fide OS Development

Mapping all physical memory
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Author:  losethos [ Mon Jan 24, 2011 5:05 am ]
Post subject:  Mapping all physical memory

OSDev is forever spewing slander. LoseThos identity maps all physical memory and never touches page tables afterward. It is obviously optimal performance-wise.

Just remember -- for every memory access with paging enabled, there are 4-5 memory accesses because it has to access 3-4 levels of page table memory. We were taught to count memory accesses to tell how fast code is, so you have 1/4 the memory accesses without paging.

How do you like that :lol:

Author:  Kieran [ Mon Jan 24, 2011 8:05 am ]
Post subject:  Re: Mapping all physical memory


I hoped I would't have to point this out to you, but this is not a place for having a pissing contest with

Please refrain from complaining about all the time or do it in general...

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