From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [PATCH] irq: Add node_affinity CPU masks for smarter irqbalance
 hints
Date: Tue, 24 Nov 2009 06:42:18 -0800
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Cc: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>,
	Yong Zhang <yong.zhang0@gmail.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"arjan@linux.jf.intel.com" <arjan@linux.jf.intel.com>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
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Peter Zijlstra wrote:
>>> Same for userspace.
>> the problem is that there is no way currently that the driver can communicate
>> "I allocated all my metadata on THIS numa node". irqbalance and sysadmins need
>> that to not make really stupid decisions.....
> 
> And what exactly is struct device::numa_node good for then?
> 

and that is exported to userspace.. how?

... that has nothing to do with an irq, and also falls flat for a driver that
supports multiple irqs, and assigns one to each numa node.