Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 4 Oct 2001 14:35:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 4 Oct 2001 14:35:38 -0400 Received: from shell.cyberus.ca ([209.195.95.7]:41914 "EHLO shell.cyberus.ca") by vger.kernel.org with ESMTP id ; Thu, 4 Oct 2001 14:35:28 -0400 Date: Thu, 4 Oct 2001 14:33:00 -0400 (EDT) From: jamal To: Andreas Dilger cc: Ingo Molnar , , Alexey Kuznetsov , Robert Olsson , Benjamin LaHaise , , Simon Kirby Subject: Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5 In-Reply-To: <20011004114021.F31061@turbolinux.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 4 Oct 2001, Andreas Dilger wrote: > On Oct 04, 2001 07:34 -0400, jamal wrote: > > 1) you shut down shared interupts; take a look at this posting by Marcus > > Sundberg > > > > --------------- > > > > 0: 7602983 XT-PIC timer > > 1: 10575 XT-PIC keyboard > > 2: 0 XT-PIC cascade > > 8: 1 XT-PIC rtc > > 11: 1626004 XT-PIC Toshiba America Info Systems ToPIC95 PCI > > \ > > to Cardbus Bridge with ZV Support, Toshiba America Info Systems ToPIC95 > > PCI \ > > to Cardbus Bridge with ZV Support (#2), usb-uhci, eth0, BreezeCom Card, \ > > Intel 440MX, irda0 12: 1342 XT-PIC PS/2 Mouse > > 14: 23605 XT-PIC ide0 > > > > ----------------------------- > > > > Now you go and shut down IRQ 11 and punish all devices there. If you can > > avoid that, it is acceptable as a temporary replacement to be upgraded to > > a better scheme. > > Well, if we fall back to polling devices if the IRQ is disabled, then the > shared interrupt case can be handled as well. However, there were complaints > about the patch when Ingo had device polling included, as opposed to just > IRQ mitigation. > I dont think youve followed the discussions too well and normally i wouldnt respond but you addressed me. Ingos netdevice polling is not the right approach, please look at NAPI and read the paper. NAPI does all what youve been suggesting. We are not even discussing that at this point. We are discussing the sledgehammer effect and how you could break a finger or two trying to kill that fly with it. The example above illustrates it. cheers, jamal - 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/