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Subject[patch] O(1) scheduler, 2.4.17-B0, 2.5.2-pre8-B0.

this is the next, bugfix release of the O(1) scheduler:

http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.5.2-B0.patch
http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.4.17-B0.patch

This release could fix the lockups and crashes reported by some people.

Changes:

- remove the likely/unlikely define from sched.h and include compiler.h.
(Adrian Bunk)

- export sys_sched_yield, reported by Pawel Kot.

- turn off 'child runs first' temporarily, to see the effect.

- export nr_context_switches() as well, needed by ReiserFS.

- define resched_task() in the correct order to avoid compiler warnings
on UP.

- maximize the frequency of timer-tick driven load-balancing to 100 per
sec.

- clear ->need_resched in the RT scheduler path as well.

- simplify yield() support, remove TASK_YIELDED and __schedule_tail().

Comments, bug reports, suggestions are welcome,

Ingo

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