From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755153AbYIQTFq (ORCPT ); Wed, 17 Sep 2008 15:05:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752769AbYIQTFX (ORCPT ); Wed, 17 Sep 2008 15:05:23 -0400 Received: from out02.mta.xmission.com ([166.70.13.232]:58347 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752489AbYIQTFW (ORCPT ); Wed, 17 Sep 2008 15:05:22 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Dimitri Sivanich Cc: Ingo Molnar , Dean Nelson , Alan Mayer , jeremy@goop.org, rusty@rustcorp.com.au, suresh.b.siddha@intel.com, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, "H. Peter Anvin" , Thomas Gleixner , Yinghai Lu References: <489C6844.9050902@sgi.com> <20080811165930.GI4524@elte.hu> <48A0737F.9010207@sgi.com> <20080911152304.GA13655@sgi.com> <20080914153522.GJ29290@elte.hu> <20080915215053.GA11657@sgi.com> <20080916082448.GA17287@elte.hu> <20080916204654.GA3532@sgi.com> <20080917173032.GA5674@sgi.com> Date: Wed, 17 Sep 2008 11:59:05 -0700 In-Reply-To: <20080917173032.GA5674@sgi.com> (Dimitri Sivanich's message of "Wed, 17 Sep 2008 12:30:32 -0500") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-XM-SPF: eid=;;;mid=;;;hst=mx04.mta.xmission.com;;;ip=24.130.11.59;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 24.130.11.59 X-SA-Exim-Rcpt-To: too long (recipient list exceeded maximum allowed size of 128 bytes) X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa04 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Dimitri Sivanich X-Spam-Relay-Country: X-Spam-Report: * -1.8 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0005] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa04 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 XM_SPF_Neutral SPF-Neutral Subject: Re: [RFC 0/4] dynamically allocate arch specific system vectors X-SA-Exim-Version: 4.2.1 (built Thu, 07 Dec 2006 04:40:56 +0000) X-SA-Exim-Scanned: Yes (on mx04.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dimitri Sivanich writes: > On Tue, Sep 16, 2008 at 03:46:54PM -0500, Dean Nelson wrote: >> On Tue, Sep 16, 2008 at 10:24:48AM +0200, Ingo Molnar wrote: >> > >> > * Dean Nelson wrote: >> > >> > > > while i understand the UV_BAU_MESSAGE case (TLB flushes are >> > > > special), why does sgi-gru and sgi-xp need to go that deep? They are >> > > > drivers, they should be able to make use of an ordinary irq just >> > > > like the other 2000 drivers we have do. >> > > >> > > The sgi-gru driver needs to be able to allocate a single irq/vector >> > > pair for all CPUs even those that are not currently online. The sgi-xp >> > > driver has similar but not as stringent needs. I need to look at these patches some more (apologies I got busy). We can not assign a vector to all CPUS. We don't have the fields for vector -> irq mapping for cpus that are not-online. So we can only assign to cpus that are online now. And latter add the other cpus when they come online. I have had that oops, it sucks, I don't want to go back. Eric