From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933130AbZKXOmO (ORCPT ); Tue, 24 Nov 2009 09:42:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933079AbZKXOmO (ORCPT ); Tue, 24 Nov 2009 09:42:14 -0500 Received: from mga10.intel.com ([192.55.52.92]:29844 "EHLO fmsmga102.fm.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933083AbZKXOmN (ORCPT ); Tue, 24 Nov 2009 09:42:13 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.47,279,1257148800"; d="scan'208";a="749953612" Message-ID: <4B0BF0CA.5020600@linux.intel.com> Date: Tue, 24 Nov 2009 06:42:18 -0800 From: Arjan van de Ven User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: Peter Zijlstra CC: Peter P Waskiewicz Jr , Yong Zhang , "linux-kernel@vger.kernel.org" , "arjan@linux.jf.intel.com" , "davem@davemloft.net" , "netdev@vger.kernel.org" Subject: Re: [PATCH] irq: Add node_affinity CPU masks for smarter irqbalance hints References: <20091123064630.7385.30498.stgit@ppwaskie-hc2.jf.intel.com> <2674af740911222332i65c0d066h79bf2c1ca1d5e4f0@mail.gmail.com> <1258968980.2697.9.camel@ppwaskie-mobl2> <1258995923.4531.715.camel@laptop> <4B0B782A.4030901@linux.intel.com> <1259051986.4531.1057.camel@laptop> In-Reply-To: <1259051986.4531.1057.camel@laptop> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.