lkml.org 
[lkml]   [2005]   [Nov]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    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.

    Send instant messages to your online friends http://au.messenger.yahoo.com

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-11-04 02:23    [W:0.022 / U:30.624 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site