Re: [PATCH] Extend mwait idle to optimize away CAL and RESinterrupts to an idle CPU -v1

[Yong Zhang]

On Mon, Feb 27, 2012 at 09:38:01AM +0100, Peter Zijlstra wrote:
> On Fri, 2012-02-24 at 14:13 +0800, Yong Zhang wrote:
> 
> > This remind me that we should have moved the irq_enter()/irq_exit() to
> > each arch's related irq handler.
> > see: http://marc.info/?l=linux-kernel&m=130709505700821&w=2
> > 
> > So Peter, is there someone alread on it? or it still worth doing now?
> 
> trouble was that some people didn't feel comfortable adding that
> overhead to plain resched IPIs that didn't need to do anything.

Any ideas on where the plain resched IPIs come from?

Thanks,
Yong

> So I
> more or less let it sit for a while.
> --
> 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/

-- 
Only stand for myself
--
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/