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    SubjectRe: 2.5.69-mm8
    >       1004     2.0% default_idle
    > 272 8.3% __copy_from_user_ll
    > 129 1.7% __d_lookup
    > 79 7.5% link_path_walk
    > ...
    > -50 -1.3% find_get_page
    > -55 -1.5% zap_pte_range
    > -66 -6.5% file_move
    > -74 -1.2% page_add_rmap
    > -80 -0.6% do_anonymous_page
    > -110 -6.9% schedule
    > -139 -7.0% atomic_dec_and_lock
    > -698 -0.4% total
    > -1139 -4.6% page_remove_rmap
    >
    > Not sure quite what that's all about, but there it is ;-)

    WRT consistency, a second set of runs indicates it's very consistent.
    And the user time is down significantly too. These are all averages
    of 5 runs to start with (well, averages of the median 3 runs of 5).
    Same for the profiles.

    Kernbench: (make -j vmlinux, maximal tasks)
    Elapsed System User CPU
    2.5.69-mm7 46.58 117.00 578.47 1492.00
    2.5.69-mm7-2 47.39 117.24 578.58 1468.75
    2.5.69-mm8 46.09 115.11 570.74 1487.25
    2.5.69-mm8-2 45.91 115.00 571.22 1494.25

    The copy to/from user stuff may be noise, but page_remove_rmap and
    atomic_dec_and_lock are certainly happier. Second set of runs gives:

    3708 8.0% default_idle
    1285 0.8% total
    161 4.9% __copy_from_user_ll
    95 2.5% find_get_page
    77 5.8% kmem_cache_free
    58 4.7% release_pages
    57 5.4% link_path_walk
    ...
    -52 -14.0% .text.lock.filemap
    -62 -14.3% .text.lock.file_table
    -63 -3.8% do_page_fault
    -67 -3.6% path_lookup
    -70 -0.5% do_anonymous_page
    -84 -10.0% pte_alloc_one
    -91 -5.7% schedule
    -111 -11.2% clear_page_tables
    -118 -6.0% atomic_dec_and_lock
    -200 -3.7% __copy_to_user_ll
    -338 -4.1% __d_lookup
    -931 -3.8% page_remove_rmap

    -
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