RE: [PATCH][2.6] fix i386 idle routine selection

[Zwane Mwaikambo]

Hi Venkatesh,

On Tue, 10 Aug 2004, Pallipadi, Venkatesh wrote:

> The original idea of setting it back to default_idle(),
> was to handle the cases:
> 1) CPU 0 says it can do mwait and CPU 1 later says it
> cannot do mwait
> 2) CPU 0 says it cannot do mwait and later CPU 1 says
> that it can do mwait
>
> Not that I know of any system like that. But, ideally
> mwait_idle should be set only when all CPUs say that
> they can do it.

Hmm. Something like mwait/monitor really should be supported on all
processors in a system running the same executive, if you do happen to
come across a system with mixed capabilities then we should clear the
capability during the processor setup so that we never even select the
mwait idle. So we should defer handling such a scenario until someone
ships something, but generally the lowest common denominator with
respect to capabilities should be the BSP.

Thanks,
	Zwane
-
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/