Re: [PATCH] x86: Add clflush before monitor for Intel 7400 series

[H. Peter Anvin]

Pallipadi, Venkatesh wrote:
> > >
> > I guess I'm a bit confused about the tradeoff of CLFLUSH versus simply
> > disabling MWAIT.  This is a relatively recent processor and so
> > optimizing matters (if this was a P4 I would be more worried about what
> > has least impact on the kernel as a whole.)
>
> As of now this is only for a limited models of CPUs (MP CPUs)
> and not a norm. It is a errata on this CPU and not
> something that is going to become architectural.

Yes, I understand.  However, there is still the option to disable MWAIT, 
and the question is still open if it makes sense.

	-hpa
--
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/