Re: 50 Watt idle power regression bisected to Linux-3.10

[Peter Zijlstra]

On Wed, Dec 11, 2013 at 03:56:55PM +0100, Ingo Molnar wrote:
> 
> * Borislav Petkov <bp@xxxxxxxxx> wrote:
> 
> > On Wed, Dec 11, 2013 at 01:43:52PM +0100, Peter Zijlstra wrote:
> > > Something like the below.. someone needs to double check and possibly
> > > add SNB/IVB EX parts if they're already available.
> > 
> > Right, our friends at Intel would need to tell us which families/models
> > does AAI65 span... if, this is actually the case.
> 
> I think CLFLUSH should be pretty universally available, IIRC graphics 
> drivers were using it rather heavily in combination with 
> write-combining MTRRs, both on Linux and on Windows.

The availability isn't the problem; the cost is. We shouldn't issue one
if its not required. Only 'broken' EX hardware needs it.
--
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/