[Linux-ia64] O(1) MQ scheduler J9 patch for IA64

Hi,

please find attached a patch which aplies to

linux-2.4.17 + kdb_common + ia64_patch + kdb_ia64 + sched-O1-2.4.17-J9.patch

I had to add a function smp_call_function_nowait which sends an IPI and
returns immediately in order to get rid of a IA64-specific race condition
when the mmu_context wraps around. Now it makes a very stable and fast
impression, interactive work is even possible while doing a "hackbench
55" and ping flooding the machine... Tested on 2 CPU BigSur, 4 CPU LION,
16 CPU AzusA.

The patch should aply to the K0 version of the scheduler, too. As this
isn't out yet for 2.4.17 I couldn't test it.

Regards,
Erich

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Erich Focht                                    <efocht@ess.nec.de>
NEC European Supercomputer Systems, European HPC Technology Center