From owner-freebsd-stable@FreeBSD.ORG Fri Nov 27 19:46:57 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 47B51106568B for ; Fri, 27 Nov 2009 19:46:57 +0000 (UTC) (envelope-from karl@denninger.net) Received: from FS.denninger.net (wsip-70-169-168-7.pn.at.cox.net [70.169.168.7]) by mx1.freebsd.org (Postfix) with ESMTP id 00E568FC0C for ; Fri, 27 Nov 2009 19:46:56 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by FS.denninger.net (8.14.3/8.13.1) with SMTP id nARJkv1f004227 for ; Fri, 27 Nov 2009 13:46:57 -0600 (CST) (envelope-from karl@denninger.net) Received: from [127.0.0.1] [192.168.1.40] by Spamblock-sys (LOCAL); Fri Nov 27 13:46:57 2009 Message-ID: <4B102C41.6040205@denninger.net> Date: Fri, 27 Nov 2009 13:45:05 -0600 From: Karl Denninger User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: Jeremy Chadwick References: <4B100262.6000900@denninger.net> <4B102059.6040003@denninger.net> <20091127190319.GA12437@icarus.home.lan> In-Reply-To: <20091127190319.GA12437@icarus.home.lan> X-Enigmail-Version: 0.96.0 Content-Type: multipart/mixed; boundary="------------050507040909060309060806" X-Antivirus: avast! (VPS 091127-1, 11/27/2009), Outbound message X-Antivirus-Status: Clean X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-stable@freebsd.org Subject: Re: PUC Serial I/O problem - copy of gnats-filed bug report (as discussed previously) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Nov 2009 19:46:57 -0000 This is a multi-part message in MIME format. --------------050507040909060309060806 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Jeremy Chadwick wrote: > On Fri, Nov 27, 2009 at 12:54:17PM -0600, Karl Denninger wrote: > >> For what its worth, USB-based serial adapters also fail in the same way, >> but faster (they have NEVER been reliable in this regard, and this >> hasn't improved) >> > > There must be a regression of some kind, given that some FreeBSD > developers have stated in the past that FTDI-based USB serial adapters > work great: > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-March/041615.html > > Original thread: > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-March/041610.html > I don't know where "works great" has come from. Certainly not my experience in "heavy" use. For non-modem-control heavy use, it works ok. I use an 8-port fanout on 7.x to drive process control and it's stable. However, for heavy modem use (e.g. Hylafax) it has NEVER been stable - although in 8.x it won't even manage to send ONE 10-page fax most of the time, where under 7.x it would randomly fail in that use. Then again the puc() driver based serial I/O was completely stable under 7.x and now, with the "new architecture" it will get one or two jobs through it before it blows up. -- Karl --------------050507040909060309060806--