Re: [PATCH] Use uname not sysctl to get the kernel revision

[H. Peter Anvin]

Benjamin Herrenschmidt wrote:
> > If you want to do the job right then do this
> >
> > - Stick an indicator of how much else wants to run on this CPU in the
> > vsyscall page or similar location
>
> Except that "this cpu" doesn't really mean anything in userspace, and
> while I think Andi has some tricks to get some sort of CPU number to
> userspace (though it's really only valid during the execution of the
> instruction that reads it :) I haven't yet found an equivalent for
> powerpc (and possibly other architectures will have the same problem).

Sure it does... although its validity in terms of a locality metric 
decays with time.

	-hpa
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