From owner-freebsd-current@FreeBSD.ORG Sat Jan 20 22:35:20 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C7D7116A406 for ; Sat, 20 Jan 2007 22:35:19 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: from wr-out-0506.google.com (wr-out-0506.google.com [64.233.184.230]) by mx1.freebsd.org (Postfix) with ESMTP id 6E74613C47E for ; Sat, 20 Jan 2007 22:35:19 +0000 (UTC) (envelope-from jfvogel@gmail.com) Received: by wr-out-0506.google.com with SMTP id 68so486207wri for ; Sat, 20 Jan 2007 14:35:17 -0800 (PST) DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=WhU0KIZ4utgKEPQiwip7dcO3x2mccg6I/LFc6ezTxqg5VF5rvAh92YZ7wDR9pDyFGRD60+3C0hvVqmWwS937k4dJrRZRE52ZcJRPf8iz1i7BK7Cp8/OSUtu6/xrcZwXfMKdxxrT3nOWctRrObps6AeV9ly/U2R/+WR2ygYybFrQ= Received: by 10.90.88.13 with SMTP id l13mr4696479agb.1169332517725; Sat, 20 Jan 2007 14:35:17 -0800 (PST) Received: by 10.90.74.7 with HTTP; Sat, 20 Jan 2007 14:35:17 -0800 (PST) Message-ID: <2a41acea0701201435g6f960b40r3cf0552d87ab2bfd@mail.gmail.com> Date: Sat, 20 Jan 2007 14:35:17 -0800 From: "Jack Vogel" To: "Bill Paul" In-Reply-To: <20070120065321.DB61216A405@hub.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <2a41acea0701171258k16b4c6ebuf1d4794b89d0749b@mail.gmail.com> <20070120065321.DB61216A405@hub.freebsd.org> Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org, jon.otterholm@ide.resurscentrum.se Subject: Re: Lenovo X60 em workaround X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 20 Jan 2007 22:35:20 -0000 On 1/19/07, Bill Paul wrote: > > > Since this was just seen, and the patch below validated as working I wanted > > to send general email to capture this: > > > > The Lenovo X60 can have issues with long ping times, this is a KNOWN > > hardware problem, and Intel is working with IBM/Lenovo, a final 'fix' has > > not been decided on yet. Nevertheless, the patch below will work, but > > I do not want to check it in as its still temporary. > > > > Address questions to me, > > Okay, I have a question. Could you elaborate on just what the problem is? > (I mean, since it's KNOWN and all...) I'm just having a hard time figuring > out what problem could possibly be fixed by setting the RX interrupt > delay timer to a non-zero value (especially since elsewhere in the em(4) > source it says that doing so is a Bad Thing (tm)). saying its known to be a problem doesnt mean its cause is known :) They discovered that setting this eliminated the problem, but we immediately pointed out that this is, as you pointed out, a Bad Thing on other hardware, so the investigation continues, there is always a communication lag on these kind of things, so I dont know if it has been resolved yet or not. I just dont think this patch will become the final way to solve this, but we shall see :) Cheers, Jack