Re: shared pagetable benchmarking

[Linus Torvalds <torvalds@transmeta.com>]

On Fri, 27 Dec 2002, Dave McCracken wrote:
>
> The other thing it does is eliminate the duplicate pte pages for shared
> regions everywhere they span a complete pte page.  While hugetlb can also
> do this for some specialized applications, shared page tables will do it
> for every shared region that's large enough.  I dunno whether you consider
> that important enough to qualify, but I figured I should point it out.

I don't consider it important enough to qualify unless there are some real 
loads where it really matters. I can well imagine that such loads exist 
(where low-memory usage by page tables is a real problem), but I'd like to 
have that confirmed as a bug-report and that the sharing really does fix 
it.

In other words, I can believe that the sharing is 2.6.x material, but
considering the fundamental nature of it I want it to be a confirmed
bug-fix, not a feature.

		Linus

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