From owner-freebsd-net@FreeBSD.ORG Tue Apr 5 01:49:22 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EE2A5106566B for ; Tue, 5 Apr 2011 01:49:22 +0000 (UTC) (envelope-from pyunyh@gmail.com) Received: from mail-pz0-f54.google.com (mail-pz0-f54.google.com [209.85.210.54]) by mx1.freebsd.org (Postfix) with ESMTP id BECF18FC14 for ; Tue, 5 Apr 2011 01:49:22 +0000 (UTC) Received: by pzk27 with SMTP id 27so1936452pzk.13 for ; Mon, 04 Apr 2011 18:49:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:from:date:to:cc:subject:message-id:reply-to :references:mime-version:content-type:content-disposition :in-reply-to:user-agent; bh=1myktaLv/EzRDsfBfFq103V/DH8Q9eDVMLpT0ClltCI=; b=qVd+2edG9H1oX/eHzI/PizVewm45c6l64aB7zcBiaVGY5+Zg/iZzapO4SVKw0/Bliq tA4AsOqIBmkyvUmrgIvprk9R3XUZNoPEzoyyQLKdWNg6LqmlAMRHQuG2T5+hiMCe4lz7 4p5sQZGVsoLLcMLuHx/I97C1l8a+jYFT54bgE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:date:to:cc:subject:message-id:reply-to:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=JjA5kKh3vyvvgmQsXQAbBYnGitXbW2IDnES60Tk8LctnzHJY2YnFMCbJ5N4EmiZtYi +S1n9zSGpMKEczm7CZ16A0J2tryB5CvVrWDsK6S2xC8JXIAEFix7gCIhY6qkLknkrM6w kslFIfU2fUhjR1fitTM760Sq4RymD8sZoIXCw= Received: by 10.142.132.20 with SMTP id f20mr6815978wfd.360.1301968162177; Mon, 04 Apr 2011 18:49:22 -0700 (PDT) Received: from pyunyh@gmail.com ([174.35.1.224]) by mx.google.com with ESMTPS id w32sm8309819wfh.7.2011.04.04.18.49.19 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 04 Apr 2011 18:49:21 -0700 (PDT) Received: by pyunyh@gmail.com (sSMTP sendmail emulation); Mon, 04 Apr 2011 18:48:25 -0700 From: YongHyeon PYUN Date: Mon, 4 Apr 2011 18:48:25 -0700 To: Adriel Torres Message-ID: <20110405014825.GA3420@michelle.cdnetworks.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i Cc: freebsd-net@freebsd.org Subject: Re: Revisit of older discussion on Intel em0 timeouts etc. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: pyunyh@gmail.com List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Apr 2011 01:49:23 -0000 On Mon, Apr 04, 2011 at 11:21:50AM -0500, Adriel Torres wrote: > Hi, > > I am new to this list and have been reading on the "tcp bug" and "bge > discussions" and wanted to share what I was experiencing with a 8.2 FreeBSD > DNS Server I had recently deployed. Basically, with an em0 interface, link > states would show changes from up to down constantly under very little or no > load. > > After a while, I switched the interface to a dc0-based interface, and for a > while it was fine, then the link states would start to change again. The Would you give me more information on dc(4) link state changes? Can you see abnormal kernel message for dc(4)? I think I fixed a couple of dc(4) issues as well as bus_dma(9) bugs and I don't know how the link state change can happen under load unless it encountered watchdog timeouts or TX underun. It would be even better if you can try latest dc(4) in stable/8 on 8.2-RELEASE. > only other discussion I found where this was talked about in-depth > was the following, but in this case it was occuring for 7.1 stable. > > http://lists.freebsd.org/pipermail/freebsd-net/2010-February/024664.html > > I just wanted to chime in in the event this might be related to any of the > bugs currently on the bug list, and if they are, I would appreciate if > someone could point me to the right discussion/bug. Thank you.