From owner-freebsd-stable@FreeBSD.ORG  Tue Nov  7 21:50:59 2006
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@freebsd.org
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 6E12416A47C
	for <freebsd-stable@freebsd.org>; Tue,  7 Nov 2006 21:50:59 +0000 (UTC)
	(envelope-from jfvogel@gmail.com)
Received: from py-out-1112.google.com (py-out-1112.google.com [64.233.166.178])
	by mx1.FreeBSD.org (Postfix) with ESMTP id BBBB643D45
	for <freebsd-stable@freebsd.org>; Tue,  7 Nov 2006 21:50:58 +0000 (GMT)
	(envelope-from jfvogel@gmail.com)
Received: by py-out-1112.google.com with SMTP id z59so1269787pyg
	for <freebsd-stable@freebsd.org>; Tue, 07 Nov 2006 13:50:58 -0800 (PST)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com;
	h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references;
	b=UpsYN47iJikDRnqkTKDgYneZHf4VXvPy3hQ9lh1EBX9rRCrQwwnLN9O9WN5/R9iv2f1yv0P6I2cYNBtcRlb+6d5smONCZoczTlC8absCEPxruV5zYVHBNX4ubpsKlqkAam0YIuyIvFZPjmLeeE3SIUp/tFSU6a1sy9yXppgz+bA=
Received: by 10.35.14.1 with SMTP id r1mr13912372pyi.1162936257806;
	Tue, 07 Nov 2006 13:50:57 -0800 (PST)
Received: by 10.35.118.6 with HTTP; Tue, 7 Nov 2006 13:50:57 -0800 (PST)
Message-ID: <2a41acea0611071350q7d7790adu767acb9c53031720@mail.gmail.com>
Date: Tue, 7 Nov 2006 13:50:57 -0800
From: "Jack Vogel" <jfvogel@gmail.com>
To: "Mike Jakubik" <mikej@rogers.com>
In-Reply-To: <4550FE11.2060002@rogers.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
References: <68011C68-0962-4946-88E1-F36EE7C707DA@redstarling.com>
	<20061106221219.GA66676@hugo10.ka.punkt.de>
	<041201c701f9$37b2aed0$9603a8c0@claylaptop>
	<2a41acea0611061614n478efe77y82c0ebc2e1b01e19@mail.gmail.com>
	<001601c702af$9d355940$9603a8c0@claylaptop>
	<4550FE11.2060002@rogers.com>
Cc: Clayton Milos <clay@milos.co.za>, freebsd-stable@freebsd.org,
	ke han <ke.han@redstarling.com>
Subject: Re: em driver testing
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 07 Nov 2006 21:50:59 -0000

On 11/7/06, Mike Jakubik <mikej@rogers.com> wrote:
> Clayton Milos wrote:
> > Hi Jack
> >
> >
> > I patched the driver and re-compiled the kernel and userland.
> >
> > All appears well with the em driver now. No more errors on it.
> > I am getting watchdog timeouts on the xl driver now though. It was
> > happenning before at the same time as the em ones. Now I've passed a
> > lot of traffic on the em interface but the xl interface gets watchdog
> > errors. The em interface still works fine but the xl one is no usable
> > after this.
>
> Has it not been established by someone that the problem is in freebsd
> (scheduler iirc) and not the drivers themselves? This along with the
> bge/bce wtachdog timeouts seems to confirm that.

Yes, I think its pretty likely to be in the timer/clock code, something
must have changed.

However, I like the design change we made to em better anyway,
the net/if timer is UP design, and has ALWAYS been vulnerable to
races, its best to do what we did (its in patch yet and not checked
in btw).

Jack