Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263275AbTE0EMb (ORCPT ); Tue, 27 May 2003 00:12:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263277AbTE0EMb (ORCPT ); Tue, 27 May 2003 00:12:31 -0400 Received: from holomorphy.com ([66.224.33.161]:17613 "EHLO holomorphy") by vger.kernel.org with ESMTP id S263275AbTE0EM3 (ORCPT ); Tue, 27 May 2003 00:12:29 -0400 Date: Mon, 26 May 2003 21:22:18 -0700 From: William Lee Irwin III To: Zwane Mwaikambo Cc: Andrew Morton , davem@redhat.com, andrea@suse.de, davidsen@tmr.com, haveblue@us.ibm.com, habanero@us.ibm.com, mbligh@aracnet.com, linux-kernel@vger.kernel.org Subject: Re: userspace irq balancer Message-ID: <20030527042218.GG8978@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Zwane Mwaikambo , Andrew Morton , davem@redhat.com, andrea@suse.de, davidsen@tmr.com, haveblue@us.ibm.com, habanero@us.ibm.com, mbligh@aracnet.com, linux-kernel@vger.kernel.org References: <20030527000639.GA3767@dualathlon.random> <20030526.171527.35691510.davem@redhat.com> <20030527004115.GD3767@dualathlon.random> <20030526.174841.116378513.davem@redhat.com> <20030527015307.GC8978@holomorphy.com> <20030526185920.64e9751f.akpm@digeo.com> <20030527021002.GD8978@holomorphy.com> <20030527024419.GF8978@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 694 Lines: 17 On Mon, 26 May 2003, William Lee Irwin III wrote: >> It's done to acknowledge every interrupt. Also, there is additional >> cost associated with bouncing the lock's cacheline. On Mon, May 26, 2003 at 10:45:20PM -0400, Zwane Mwaikambo wrote: > Bah, determining owning ioapic of an irq would get too ugly, you can have > the same irq connected to multiple ioapics so which to lock? It tends to be all or one, detectable with IO_APIC_IRQ(). -- wli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/