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    SubjectRe: page fault scalability patch final : i386 tested, x86_64 support added
    On Fri, 27 Aug 2004, Andrew Morton wrote:

    > Christoph Lameter <clameter@sgi.com> wrote:
    > >
    > > So I think the move to atomic for rss acceptable?
    >
    > Short-term, yes. Longer term (within 12 months), no - 50-bit addresses on
    > power5 will cause it to overflow.

    I would expect the page size to rise as well. On IA64 we already have
    16KB-64KB pages corresponding to 256TB - 1PB. Having to manage a couple of
    billion pages could be a significant performance impact. Better increase
    the page size.

    I still would also like to see atomic64_t. I think there was a patch
    posted to linux-ia64 a couple of months back introducing atomic64_t but it
    was rejected since it would not be supportable on other arches.
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