linux-kernel - Re: [PATCH 2/3] x86: x2apic/cluster: Make use of lowest priority delivery mode

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Message-ID: <20120521071135.GA28930@dhcp-26-207.brq.redhat.com>
Date:	Mon, 21 May 2012 09:11:36 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH 2/3] x86: x2apic/cluster: Make use of lowest priority
 delivery mode

On Sat, May 19, 2012 at 02:47:25PM +0400, Cyrill Gorcunov wrote:
> On Fri, May 18, 2012 at 07:51:19PM +0400, Cyrill Gorcunov wrote:

> > Ah, you mean io-apic here. I'll try to find some time tonight/tomorrow-morning
> > for review. Thanks!
> 
> Sorry for delay, Alexander. I can only review the code (I've no x2apic
> testing machine at the moment) and it looks good for me.
> 
> Reviewed-by: Cyrill Gorcunov <gorcunov@...nvz.org>

Thank you, Cyrill.

> p.s. Hope Suresh and Yinghai will take a look too. The thing which bothers
> me is that we use LowPrio delivery mode, while there is no lowprio in
> x2apic ipi messages and I assume the same should apply to ioapic generated
> messages.

My understanding of the specification is LowestPrio is not supported only for
IPIs on x2APIC. Can not imagine why IO-APICs need to be limited here. But let's
hear what the guys think.


-- 
Regards,
Alexander Gordeev
agordeev@...hat.com
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