Re: [Xen-devel] Is: axe read_tscp pvops call. Was: Re: [RFC] ACPIS3 and Xen (suprisingly small\!).

[Stefano Stabellini]

On Thu, 18 Oct 2012, Borislav Petkov wrote:
> On Thu, Oct 18, 2012 at 08:56:40AM -0700, Dan Magenheimer wrote:
> > I agree the whole idea of paravirtualization is a hack, but it is a
> > hack to workaround some poor architectural design decisions many years
> > ago by Intel processor designers who should have known better. Go yell
> > at them.
> >
> > Worse, the rdtscp instruction was a poor design decision by AMD
> > processor designers to hack around tsc skew problems. Go yell at them
> > too.
> >
> > And both Intel and AMD chose to perpetuate the problem with a
> > complicated VT/SVM implementation that will never perform as well as
> > native. At least they tried ;-)
> 
> Looks like xen people seem to know better so maybe they should design
> their own processor, add xen support for it and leave the linux kernel
> alone so that both camps can finally get on with their lives.

I know that it is obvious but it is worth stating it in clear letters:

these are Dan's personal opinions and by no means represent the position
of the Xen community as a whole on this topic.

I, for one, have no idea what he is talking about.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/