Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 21 Jan 2002 12:27:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 21 Jan 2002 12:26:55 -0500 Received: from zcars0m9.nortelnetworks.com ([47.129.242.157]:39332 "EHLO zcars0m9.ca.nortel.com") by vger.kernel.org with ESMTP id ; Mon, 21 Jan 2002 12:26:36 -0500 Message-ID: <3C4C50C9.8C7D5B6F@nortelnetworks.com> Date: Mon, 21 Jan 2002 12:32:57 -0500 X-Sybari-Space: 00000000 00000000 00000000 From: Chris Friesen X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.4.16 i686) X-Accept-Language: en MIME-Version: 1.0 To: yodaiken@fsmlabs.com Cc: Daniel Phillips , george anzinger , Momchil Velikov , Arjan van de Ven , Roman Zippel , linux-kernel@vger.kernel.org Subject: Re: [2.4.17/18pre] VM and swap - it's really unusable In-Reply-To:

<20020121090602.A13715@hq.fsmlabs.com> <20020121095051.B14139@hq.fsmlabs.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org yodaiken@fsmlabs.com wrote: > So your claim is that: > Preemption improves latency when there are both kernel cpu bound > tasks and tasks that are I/O bound with very low cache hit > rates? > > Is that it? > > Can you give me an example of a CPU bound task that runs > mostly in kernel? Doesn't that seem like a kernel bug? cat /dev/urandom > /dev/null -- Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com - 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/