From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 31 Dec 2002 07:09:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 31 Dec 2002 07:09:56 -0500 Received: from 214pc221.sshunet.nl ([131.211.221.214]:19716 "EHLO chili") by vger.kernel.org with ESMTP id ; Tue, 31 Dec 2002 07:09:53 -0500 To: linux-kernel@vger.kernel.org Subject: 2.4.21-pre2 IDE problems From: Marijn Ros Date: 31 Dec 2002 13:18:15 +0100 Message-ID: <87isxa4c1k.fsf@214pc221.sshunet.nl> User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.4 (Common Lisp) 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 Hi all, My (old, but still newest) machine has a UM8886A south bridge with IDE controller. This chip is not supported and therefor runs at PIO mode 0, yielding a whopping 2MB/s throughput with the normal (old) 2.4 IDE code. However, when I try the new 2.4.21-pre2 taskfile IO setting, I get a 'hda: lost interrupt' message every 30 seconds (the timeout period I guess) during disk IO, making the machine unusable. I know this setting is experimental, but I guess you would like to know about my problems before the old code is phased out completely. I understood that taskfile IO is a backport of 2.5 code, so I decided to try 2.5.53 too. Strangely, it doesn't loose IDE interrupts, but seems to loose clock interrupts during disk IO, as ntpd looses sync (0.6-1.2s per 20 minutes) during a kernel compile but not during normal usage (web-browsing and e-mail on an otherwise idle system). Setting kernel preemtion doesn't make a difference (don't know why I decided to test that anymore). I am not on this list, but plan to read the archives avery day. If more information is needed, please CC me so I can send a proper reply. Bye, Marijn