Re: [PATCH] MM: Support more pagesizes for MAP_HUGETLB/SHM_HUGETLB v6

From: Valdis . Kletnieks
Date: Tue Oct 23 2012 - 18:58:16 EST

On Mon, 22 Oct 2012 08:36:33 -0700, Andi Kleen said:

> Thinking about it more PowerPC has a 16GB page, so we probably
> need to move this to prot.

Gaak - is that a typo? If not, what is the use case - allowing a small number of
pages to cover all memory, with big wins on TLB hit ratios? I certainly can't see
it as a sane primitive for a virtual memory design that does paging/swapping?

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