From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: [PATCH 09/12] irq: implement IRQ expecting Date: Sat, 19 Jun 2010 21:49:37 +0200 Message-ID: <20100619194937.GR18946@basil.fritz.box> References: <1276443098-20653-1-git-send-email-tj@kernel.org> <1276443098-20653-10-git-send-email-tj@kernel.org> <20100616204854.4b036f87@infradead.org> <87zkyro1xl.fsf@basil.nowhere.org> <4C1C830B.5020806@kernel.org> <20100619090031.GE18946@basil.fritz.box> <20100619075451.48c13589@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from one.firstfloor.org ([213.235.205.2]:54999 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756735Ab0FSTtj (ORCPT ); Sat, 19 Jun 2010 15:49:39 -0400 Content-Disposition: inline In-Reply-To: <20100619075451.48c13589@infradead.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Arjan van de Ven Cc: Andi Kleen , Tejun Heo , mingo@elte.hu, tglx@linutronix.de, bphilips@suse.de, yinghai@kernel.org, akpm@linux-foundation.org, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, jeff@garzik.org, linux-ide@vger.kernel.org, stern@rowland.harvard.edu, gregkh@suse.de, khali@linux-fr.org > Here we have the opportunity to get real good information.. we KNOW > now an interrupt is coming, and we can even estimate how long it'll > be... Even for the first few after a long time, before a pattern > emerges. Ok but I thought the driver would just fill in a single number likely. Is that really that good information? Alternatively each driver would need to implement some dynamic estimation algorithm, but that would be just mostly equivalent to having it all in the idle governour? -Andi -- ak@linux.intel.com -- Speaking for myself only.