PERFORCE change 119371 for review

[Attilio Rao]

2007/5/9, John Baldwin <jhb at freebsd.org>:
> On Sunday 06 May 2007 05:10:35 pm Rui Paulo wrote:
> > http://perforce.freebsd.org/chv.cgi?CH=119371
> >
> > Change 119371 by rpaulo at rpaulo_epsilon on 2007/05/06 21:10:15
> >
> >       We don't need any scheduler support because:
> >       1) msrtemp is a child of cpu - this implies that every
> >          rdmsr/cpuid instruction will be executed on that CPU.
>
> No, that isn't true.  You do need to use sched_bind() for that so you are
> really on the desired CPU when you read the MSR.

I think he just needs msr of the cpu where curthread is executed, so
any scheduler lock should be needed.
If he needs to know msr of a particular CPU he really needs so, but it
doesn't seem the case.

Attilio


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