From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755907AbYGJXMO (ORCPT ); Thu, 10 Jul 2008 19:12:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754134AbYGJXL7 (ORCPT ); Thu, 10 Jul 2008 19:11:59 -0400 Received: from out01.mta.xmission.com ([166.70.13.231]:40609 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753456AbYGJXL7 (ORCPT ); Thu, 10 Jul 2008 19:11:59 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: Suresh Siddha Cc: mingo@elte.hu, hpa@zytor.com, tglx@linutronix.de, akpm@linux-foundation.org, arjan@linux.intel.com, andi@firstfloor.org, ebiederm@xmission.com, jbarnes@virtuousgeek.org, steiner@sgi.com, linux-kernel@vger.kernel.org References: <20080710181634.764954000@linux-os.sc.intel.com> <20080710182237.489115000@linux-os.sc.intel.com> Date: Thu, 10 Jul 2008 16:08:03 -0700 In-Reply-To: <20080710182237.489115000@linux-os.sc.intel.com> (Suresh Siddha's message of "Thu, 10 Jul 2008 11:16:45 -0700") 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-SA-Exim-Connect-IP: 24.130.11.59 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa01 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Suresh Siddha 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 * -1.1 BAYES_05 BODY: Bayesian spam probability is 1 to 5% * [score: 0.0285] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa01 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 XM_SPF_Neutral SPF-Neutral Subject: Re: [patch 11/26] x64, x2apic/intr-remap: generic irq migration support from process context X-SA-Exim-Version: 4.2 (built Thu, 03 Mar 2005 10:44:12 +0100) X-SA-Exim-Scanned: Yes (on mgr1.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Suresh Siddha writes: > Generic infrastructure for migrating the irq from the process context in the > presence of CONFIG_GENERIC_PENDING_IRQ. > > This will be used later for migrating irq in the presence of > interrupt-remapping. Why the API difference between IRQ_MOVE_PCNTXT set affinity handlers and !CONFIG_GENERIC_PENDING_IRQ handlers? > #ifdef CONFIG_GENERIC_PENDING_IRQ > - set_pending_irq(irq, cpumask); > + if (desc->status & IRQ_MOVE_PCNTXT) { > + unsigned long flags; > + > + spin_lock_irqsave(&desc->lock, flags); > + desc->chip->set_affinity(irq, cpumask); > + spin_unlock_irqrestore(&desc->lock, flags); > + } else > + set_pending_irq(irq, cpumask); > #else > desc->affinity = cpumask; > desc->chip->set_affinity(irq, cpumask); > > --