[Linux-ia64] O(1) scheduler K3: new IA64 patch

[Linux-ia64] O(1) scheduler K3: new IA64 patch

[Erich Focht]

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Hi!

Please find attached an updated version of the IA64 version of
Ingo's O(1) scheduler patch. The changes to the previous version are:
- the context wrap around problem is now solved without locks (thanks to
David Mosberger for the suggestion),
- set_cpus_allowed() should do what it is expected to: set the
cpus_allowed mask of an arbitrary process and move it to a new CPU if
needed.
- should compile an UP kernel cleanly (Mike Madore's hint).

There were reports that the IDLE_REBALANCE_TICK value is too small for
machines with more than 16 CPUs where all the idle cpus trying to
load_balance() slow down the booting CPU considerably. Maybe 10ms would be
more appropriate in this case...

Best regards,
Erich


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