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    SubjectRe: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19
    Linus Torvalds wrote:
    > On Fri, 4 Nov 2005, Nick Piggin wrote:
    >>Looks like ppc64 is getting 64K page support, at which point higher
    >>order allocations (eg. for stacks) basically disappear don't they?
    > Yes and no, HOWEVER, nobody sane will ever use 64kB pages on a
    > general-purpose machine.
    > 64kB pages are _only_ usable for databases, nothing else.
    > Why? Do the math. Try to cache the whole kernel source tree in 4kB pages
    > vs 64kB pages. See how the memory usage goes up by a factor of _four_.

    Yeah that's true. But Martin's worried about future machines
    with massive memories - so maybe it is safe to assume those will
    be using big pages, I don't know.

    Maybe the solution is to bloat the kernel sources enough to make
    64KB pages worthwhile?

    SUSE Labs, Novell Inc.

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      Last update: 2005-11-04 02:23    [W:0.021 / U:8.384 seconds]
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