From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 23 Nov 2001 08:09:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 23 Nov 2001 08:09:42 -0500 Received: from mta05ps.bigpond.com ([144.135.25.137]:18892 "EHLO mta05ps.bigpond.com") by vger.kernel.org with ESMTP id ; Fri, 23 Nov 2001 08:09:32 -0500 Content-Type: text/plain; charset=US-ASCII From: hari To: Samium Gromoff <_deepfire@mail.ru> Subject: Re: Heavy disk IO stalls ftp/http downloads Date: Sat, 24 Nov 2001 00:12:41 +0000 X-Mailer: KMail [version 1.3.1] Cc: linux-kernel@vger.kernel.org In-Reply-To: <200111231132.fANBWbk11468@vegae.deep.net> In-Reply-To: <200111231132.fANBWbk11468@vegae.deep.net> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: <20011123130935Z282139-17408+17818@vger.kernel.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 23 Nov 2001 11:32, Samium Gromoff wrote: > does hdparm -u1 fixes the problem? > -u1 == unmasq irq during its handling > the problem is that serial port need its interrupt to be served with > minimal latency, and the drives makes that impossible, unless irqs are > unmasked... Hello Samium, Thanks a lot for your response. Yes, I have -u1 support enabled for both the hard drives (in fact it is /sbin/hdparm -m16 -c3 -u1 -X66 -d1 -W1 /dev/hda and /dev/hdc). But, unfortunately it does not fix the problem. Here is the 'hdparm' output from the hard drives: /dev/hda: multcount = 16 (on) I/O support = 3 (32-bit w/sync) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 1247/255/63, sectors = 20044080, start = 0 /dev/hdc: multcount = 16 (on) I/O support = 3 (32-bit w/sync) unmaskirq = 1 (on) using_dma = 1 (on) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 1240/255/63, sectors = 19931184, start = 0 -- Hari. harisri@bigpond.com