Results now with highpte

2.5.74-bk6-44 is with the patch applied
2.5.74-bk6-44-on is with the patch applied and 4/4 config option.
2.5.74-bk6-44-hi is with the patch applied and with highpte instead.

Overhead of 4/4 isn't much higher, and is much more generally useful.

Kernbench: (make -j vmlinux, maximal tasks)
                              Elapsed      System        User         CPU
                   2.5.74       46.11      115.86      571.77     1491.50
            2.5.74-bk6-44       45.92      115.71      570.35     1494.75
         2.5.74-bk6-44-on       48.11      134.51      583.88     1491.75
         2.5.74-bk6-44-hi       47.06      131.13      570.79     1491.50

SDET 128  (see disclaimer)
                           Throughput    Std. Dev
                   2.5.74       100.0%         0.1%
            2.5.74-bk6-44       100.3%         0.7%
         2.5.74-bk6-44-on        92.1%         0.2%
         2.5.74-bk6-44-hi        94.5%         0.1%


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