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Subject[patch] O(1) scheduler, -H7

the -H7 patch is available:

http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.5.2-pre11-H7.patch
http://redhat.com/~mingo/O(1)-scheduler/sched-O1-2.4.17-H7.patch

there is an important SMP fix in this release, found by Anton Blanchard:
double-spin_unlock()ing triggered oopses on high-end SMP boxes.

stability status: all reported problems were fixed by -H6, the only
problem remaining was Anton's SMP crashes, which should be fixed in this
-H7 patch.

Changes between -H6 and -H7:

- Anton Blanchard: fix double spin_unlock in sched.c. This fixes
a high-end SMP oops he saw.

- William Lee Irwin III: fix mwave's ->nice code.

- cleanup: mmu_context.h renamed to sched.h, as suggested by
Richard Henderson.

- added a irqs_enabled() macro to the x86 tree, to simplify irq.c.

Bug reports, comments, suggestions welcome.

Ingo

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