Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268762AbUIGXUn (ORCPT ); Tue, 7 Sep 2004 19:20:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268759AbUIGXSS (ORCPT ); Tue, 7 Sep 2004 19:18:18 -0400 Received: from mailgate.urz.tu-dresden.de ([141.30.66.154]:15776 "EHLO mailgate.urz.tu-dresden.de") by vger.kernel.org with ESMTP id S268762AbUIGXPi (ORCPT ); Tue, 7 Sep 2004 19:15:38 -0400 Date: Wed, 8 Sep 2004 01:15:36 +0200 (MEST) From: Hendrik Fehr To: linux-kernel@vger.kernel.org Subject: Re: PROBLEM: Full CPU-usage on sis5513-chipset disc input/output-operations In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-TUD-Virus-Scanned: by amavisd-new at rks24.urz.tu-dresden.de X-TUD-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on rks24 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 963 Lines: 29 Hello again! SUMMARY: I reported that i discover full cpu usage when performing disc i/o on an sis5513 ide dma chipset. Disabling acpi and io-apic in the kernel and passing pci=biosirq did not solve the problem. NEWS: I think i found it! I did not noticed that the /proc/stat fields changed between 2.4 and 2.6. (my monitor util mystiriously couted/added "wating for io" to the sys cpu time.) That was what drived me crazy. Yes, yes i did not check CHANGES file, sorry for the disturbing. question: is "waiting for io" real cpu time, or can i consider this time as idle? I was unable to figure this out by myself, sorry. Best regards, Hendrik Fehr PS: german for this is something like: "peinlich peinlich". - 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/