[patch] O(1) scheduler, -J7

From: Ingo Molnar (mingo@elte.hu)
Date: Fri Jan 25 2002 - 11:39:57 EST


the -J7 O(1) scheduler patch for kernels 2.5.3-pre5, 2.4.17-pre7 and
2.4.17 is available at:

    http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.5.3-pre5-J7.patch
    http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.4.17-J7.patch
    http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.4.18-pre7-J7.patch

-J7 includes the fixes and improvements explained in the component patches
sent to lkml earlier today. -J7 is the combination of those 9 patches,
backported to 2.4.17 and 2.4.18-pre as well.

i'd like to ask those people to retest -J7 who had problems booting the
O(1) scheduler on fb-console enabled systems. Also, the shell 'hanging'
problems should be fixed in -J7 as well.

please also report any interactiveness degradation/improvement relative to
any of the previous 'J series' patches: -J2, -J4, -J5 and -J6.

More adventurous people might want to tweak the new tunables in sched.h,
and/or try Jack F. Vogel's runtime tuning patch. Careful though, eg.
setting MAX_TIMESLICE too low can produce unexpected results ...

Bug reports, comments, suggestions welcome,

        Ingo

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