linux-kernel - Re: [RFC] sched: CPU topology try

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Message-ID: <20140107095039.GA2480@laptop.programming.kicks-ass.net>
Date:	Tue, 7 Jan 2014 10:50:39 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Cc:	Vincent Guittot <vincent.guittot@...aro.org>,
	linux-kernel@...r.kernel.org, mingo@...nel.org, pjt@...gle.com,
	Morten.Rasmussen@....com, cmetcalf@...era.com, tony.luck@...el.com,
	alex.shi@...aro.org, linaro-kernel@...ts.linaro.org, rjw@...k.pl,
	paulmck@...ux.vnet.ibm.com, corbet@....net, tglx@...utronix.de,
	len.brown@...el.com, arjan@...ux.intel.com,
	amit.kucheria@...aro.org, james.hogan@...tec.com,
	schwidefsky@...ibm.com, heiko.carstens@...ibm.com,
	Dietmar.Eggemann@....com
Subject: Re: [RFC] sched: CPU topology try

On Tue, Jan 07, 2014 at 03:10:21PM +0530, Preeti U Murthy wrote:
> What if we want to add arch specific flags to the NUMA domain? Currently
> with Peter's patch:https://lkml.org/lkml/2013/11/5/239 and this patch,
> the arch can modify the sd flags of the topology levels till just before
> the NUMA domain. In sd_init_numa(), the flags for the NUMA domain get
> initialized. We need to perhaps call into arch here to probe for
> additional flags?

What are you thinking of? I was hoping all NUMA details were captured in
the distance table.

Its far easier to talk of specifics in this case.
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