Re: MSR driver

Stephan Meyer (
Fri, 14 Nov 1997 21:23:58 +0100 (MET)

On 14 Nov 1997, H. Peter Anvin wrote:
> Only if you take SMP into account (this applies to all methods.) It's
> no good if on an SMP machine you effectively end up setting MSR's on
> any random processor, which may change without notice.

Okay! Come on! You SMP guys! Please help me add support for SMP! I see no
problem in doing this except that I'm not driving around my block in a
Mercedes. Not even in a broken "A Klasse" :)

If you tell me how to do it, I can implement it and send it to you for

Implementing SMP is no problem in both the device file and proc FS

But which one should I choose??

I see no point in working on one when someone comes around the corner a
few weeks later and tells me that MSR support is not gonna be included in
the kernel because it uses the wrong interface!

> We may want to have a "cpu X only" system call (schedule only on a
> specific processor) for things that use per-processor features, such
> as RDTSC.)

Could you do this?

> -hpa

- Stephan

P.S.: Please don't get me wrong. I very much appreciate all your hard work
at Linux, esp. the recent p5bugfix :).

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