Re: [PATCH 2.6.16-mm1 2/2] sched_domains: Allocate sched_groupsdynamically

From: Paul Jackson
Date: Fri Jul 07 2006 - 01:25:16 EST


Suresh wrote:
> It is quite possible that the kernel you are testing doesn't have multi-core
> scheduler domain. If so, then you may not run into this issue.

Aha - we have a winner.

CONFIG_SCHED_MC was not enabled in this kernel.

Now what I see matches what it should.

On a Hyper-Thread (but not Multi-Core) x86_64 system that I
tested with CONFIG_SCHED_MC enabled, your patch was required to
keep single-cpu cpu_exclusive cpusets from instantly locking
up the system.

On a Multi-Core (but not Hyper-Thread) IA64 Montecito system
that did -not- have CONFIG_SCHED_MC enabled, there is no
such problem with single-cpu cpu_exclusive cpusets in the
first place. It worked ok, even without the patch.

Thank-you.

--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@xxxxxxx> 1.925.600.0401
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