Messages in this thread | | | From | David Mosberger <> | Date | Fri, 2 Aug 2002 21:39:36 -0700 | Subject | Re: large page patch (fwd) (fwd) |
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>>>>> On Fri, 2 Aug 2002 21:26:52 -0700 (PDT), Linus Torvalds <torvalds@transmeta.com> said:
>> I wasn't disagreeing with your case for separate large page >> syscalls. Those syscalls certainly simplify implementation and, >> as you point out, it well may be the case that a transparent >> superpage scheme never will be able to replace the former.
Linus> Somebody already had patches for the transparent superpage Linus> thing for alpha, which supports it. I remember seeing numbers Linus> implying that helped noticeably.
Yes, I saw those. I still like the Rice work a _lot_ better. It's just a thing of beauty, from a design point of view (disclaimer: I haven't seen the implementation, so there may be ugly things lurking...).
Linus> But yes, that definitely doesn't work for humongous pages (or Linus> whatever we should call the multi-megabyte-special-case-thing Linus> ;).
Yes, you're probably right. 2MB was reported to be fine in the Rice experiments, but I doubt 256MB (and much less 4GB, as supported by some CPUs) would fly.
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