Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760676AbXKTQKi (ORCPT ); Tue, 20 Nov 2007 11:10:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756127AbXKTQKa (ORCPT ); Tue, 20 Nov 2007 11:10:30 -0500 Received: from rtr.ca ([76.10.145.34]:2264 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758254AbXKTQK3 (ORCPT ); Tue, 20 Nov 2007 11:10:29 -0500 Message-ID: <474306F2.4060502@rtr.ca> Date: Tue, 20 Nov 2007 11:10:26 -0500 From: Mark Lord User-Agent: Thunderbird 2.0.0.9 (X11/20071031) MIME-Version: 1.0 To: Arjan van de Ven Cc: Nick Piggin , Andrew Morton , Linus Torvalds , Ingo Molnar , Linux Kernel Subject: Re: CONFIG_IRQBALANCE for 64-bit x86 ? References: <47425EA5.7000607@rtr.ca> <200711201517.16171.nickpiggin@yahoo.com.au> <20071119213727.16d5917b@laptopd505.fenrus.org> <200711201837.39664.nickpiggin@yahoo.com.au> <20071120064747.2a8036cd@laptopd505.fenrus.org> <4743018C.1000307@rtr.ca> <474302D0.9000509@rtr.ca> <20071120080243.22725fb3@laptopd505.fenrus.org> In-Reply-To: <20071120080243.22725fb3@laptopd505.fenrus.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1079 Lines: 33 Arjan van de Ven wrote: > On Tue, 20 Nov 2007 10:52:48 -0500 > Mark Lord wro >> All of which reminds me of perhaps *the* most important reason to keep >> core functionality like "IRQ distribution" *inside* the kernel: >> >> It has to pass peer review on this mailing list. > > > that's a reason to keep it in the *source*, that's not the same as .. Ack. :) > keeping it in ring0 pinning down memory all the time etc ;) .. I belive it *must* remain pinned in memory to be effective, because I also know it must run much more frequently than it currently seems to run, in order to respond to quick changes in IRQ load. Eg. a heretofore idle device is suddenly now being used to copy a DVD-sized file around. It *must* respond quickly to changes in load like this, or system latencies will suffer badly. Cheers - 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/