From owner-freebsd-stable@FreeBSD.ORG  Mon Apr 14 15:13:45 2003
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: by hub.freebsd.org (Postfix, from userid 916)
	id D93EF37B401; Mon, 14 Apr 2003 15:13:45 -0700 (PDT)
Date: Mon, 14 Apr 2003 15:13:45 -0700
From: Prafulla Deuskar <pdeuskar@freebsd.org>
To: "Jacob S. Barrett" <jbarrett@amduat.net>
Message-ID: <20030414151345.A85568@hub.freebsd.org>
References: <20030414091855.A58639@hub.freebsd.org>
	<3E9AEEEE.1010202@amduat.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2.5.1i
In-Reply-To: <3E9AEEEE.1010202@amduat.net>;
	from jbarrett@amduat.net on Mon, Apr 14, 2003 at 10:25:02AM -0700
X-Operating-System: FreeBSD 4.8-RC on an i386
cc: freebsd-stable@freebsd.org
Subject: Re: em0: watchdog timeout -- resetting
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
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: Mon, 14 Apr 2003 22:13:46 -0000

> 
> 
> Prafulla Deuskar wrote:
> > The driver version in 4.7-RELEASE was 1.3.14.
> > To check if it is a driver issue can we go back to old driver?
> 
> That worked.  I don't see the messages anymore.  Machine performance is 
> back to normal.
> 
> So do you know what may have changed between 4.7/1.3.14 and it looks 
> like 1.4.10 for 4.8?  There are some changes that were commited around 
> VLAN priority tag masking that I will need to apply to this version to 
> go forward with it.  Is there anything else that I should be aware of 
> that changed between versions?
>
I broke support for 82542 based adapters *only* in 1.4.7/10 driver when I started to use
RS for writebacks on descriptors unconditionally. (Report Status -- when data is dma'ed on chip)
Easy fix in 1.4.10 driver is to change value for EM_REPORT_TX_EARLY in if_em.h as follows:

#define EM_REPORT_TX_EARLY 1

This problem is not present in the latest driver in -stable. (1.5.31)

Thanks,
Prafulla