From owner-freebsd-current@FreeBSD.ORG  Wed Nov 10 13:51:48 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 78CD916A4CE; Wed, 10 Nov 2004 13:51:48 +0000 (GMT)
Received: from spider.deepcore.dk
	(cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk [80.166.201.166])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id C871443D55; Wed, 10 Nov 2004 13:51:47 +0000 (GMT)
	(envelope-from sos@DeepCore.dk)
Received: from [194.192.25.143] (laptop.deepcore.dk [194.192.25.143])
	by spider.deepcore.dk (8.12.11/8.12.10) with ESMTP id iAADphXM037722;
	Wed, 10 Nov 2004 14:51:45 +0100 (CET)
	(envelope-from sos@DeepCore.dk)
Message-ID: <41921CC4.5010802@DeepCore.dk>
Date: Wed, 10 Nov 2004 14:51:00 +0100
From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>
User-Agent: Mozilla Thunderbird 0.7.2 (X11/20040802)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Robert Watson <rwatson@freebsd.org>
References: <Pine.NEB.3.96L.1041110102656.60848Y-100000@fledge.watson.org>
In-Reply-To: <Pine.NEB.3.96L.1041110102656.60848Y-100000@fledge.watson.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable
X-mail-scanned: by DeepCore Virus & Spam killer v1.4
cc: Zoltan Frombach <tssajo@hotmail.com>
cc: freebsd-current@freebsd.org
Subject: 
 Re: 5.3-RELEASE: WARNING - WRITE_DMA interrupt timout - what does
 it	mean?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 10 Nov 2004 13:51:48 -0000

Robert Watson wrote:
> On Wed, 10 Nov 2004, S=F8ren Schmidt wrote:
>=20
>=20
>>>I'm still a bit skeptical that the task queue is at fault -- I run my
>>>notebook with continuous measurement of the latency to schedule tasks,=

>>>generating a warning for any latency > .5 seconds, and the only time I=

>>>ever see that sort of latency is during the boot process when ACPI has=

>>>scheduled a task to run, but the task queue thread has not yet been
>>>allowed to run:
>>
>>Right, the timeout is 5 secs. I havn't looked into how the taskqueues
>>are handled recently, but in case of ATA read/writes it is the
>>bio_taskqueue handled by geom thats in use not the catchall ones, does
>>your timing cover that as well?=20
>=20
>=20
> Nope -- I had assumed that the suggested task problems in question was =
the
> use of taskqueue_enqueue() in ata-queue for the timeout, rather than th=
e
> bio_taskqueue() ata_completed() call.

OK, then there is no idea in trying the patch, it wont tell us anything.

--=20

-S=F8ren