Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262256AbUDIAIi (ORCPT ); Thu, 8 Apr 2004 20:08:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262316AbUDIAIi (ORCPT ); Thu, 8 Apr 2004 20:08:38 -0400 Received: from main.gmane.org ([80.91.224.249]:20609 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S262256AbUDIAIh (ORCPT ); Thu, 8 Apr 2004 20:08:37 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: =?ISO-8859-1?Q?Sven_K=F6hler?= Subject: Re: cat /dev/hdb > /dev/null DoS Date: Fri, 09 Apr 2004 02:10:55 +0200 Message-ID: References: <20040408085518.B4607@beton.cybernet.src> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: p508a5820.dip.t-dialin.net User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7b) Gecko/20040316 X-Accept-Language: de, en In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 574 Lines: 9 > i guess you have DMA enabled on /dev/hdb. I would expect, that the > system is at least 50% idle i did dd if=/dev/hda of=/dev/null bs=1M and noticed, that top shows 0% idle, but 95% wa - what ever that means. Since i've got DMA turned on, i would expect the CPU to be 95% idle, instead 95% wa? what does "wa" stand for? - 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/