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    SubjectRe: page fault scalability patch final : i386 tested, x86_64 support added
    > Index: linux-2.6.9-rc1/include/linux/sched.h
    > ===================================================================
    > --- linux-2.6.9-rc1.orig/include/linux/sched.h 2004-08-25 10:50:12.534021000 -0700
    > +++ linux-2.6.9-rc1/include/linux/sched.h 2004-08-27 12:14:09.564008624 -0700
    > @@ -197,9 +197,10 @@
    > pgd_t * pgd;
    > atomic_t mm_users; /* How many users with user space? */
    > atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
    > + atomic_t mm_rss; /* Number of pages used by this mm struct */

    atomic_t is normally 32bit, even on a 64bit arch. This will limit the max
    memory size per process to 2^(32+PAGE_SHIFT). I don't think that's a good idea.

    On some architectures it used to be 24bit only even, but I think that
    has been fixed.

    I think you need atomic64_t

    -Andi
    -
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