From owner-freebsd-questions@FreeBSD.ORG  Fri May 23 10:46:18 2003
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 02A1837B401
	for <freebsd-questions@freebsd.org>;
	Fri, 23 May 2003 10:46:18 -0700 (PDT)
Received: from rwcrmhc53.attbi.com (rwcrmhc53.attbi.com [204.127.198.39])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 5DCDC43F93
	for <freebsd-questions@freebsd.org>;
	Fri, 23 May 2003 10:46:14 -0700 (PDT)
	(envelope-from freebsd-questions-local@be-well.no-ip.com)
Received: from be-well.ilk.org (lowellg.ne.client2.attbi.com[24.147.188.198])
          by attbi.com (rwcrmhc53) with ESMTP
          id <2003052317461305300p5o3be>; Fri, 23 May 2003 17:46:14 +0000
Received: from be-well.ilk.org (lowellg.ne.client2.attbi.com [24.147.188.198]
	(may be forged))
	by be-well.ilk.org (8.12.9/8.12.7) with ESMTP id h4NHkDFb010122;
	Fri, 23 May 2003 13:46:13 -0400 (EDT)
	(envelope-from freebsd-questions-local@be-well.no-ip.com)
Received: (from lowell@localhost)
	by be-well.ilk.org (8.12.9/8.12.6/Submit) id h4NHkC6R010119;
	Fri, 23 May 2003 13:46:12 -0400 (EDT)
X-Authentication-Warning: be-well.ilk.org: lowell set sender to
	freebsd-questions-local@be-well.ilk.org using -f
Sender: lowell@be-well.no-ip.com
To: Aleksandr Shapayev <cojet@front.ru>
References: <441001862.20030522003349@front.ru>
From: Lowell Gilbert <freebsd-questions-local@be-well.no-ip.com>
Date: 23 May 2003 13:46:12 -0400
In-Reply-To: <441001862.20030522003349@front.ru>
Message-ID: <44fzn5pndn.fsf@be-well.ilk.org>
Lines: 16
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
cc: freebsd-questions@freebsd.org
Subject: Re: 'silo overflow' kernel messages
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: freebsd-questions@freebsd.org
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 23 May 2003 17:46:18 -0000

Aleksandr Shapayev <cojet@front.ru> writes:

> FreeBSD 3.5-STABLE worked fine, but after installing 4.8-RELEASE I
> begin receive 'sio1: 1 more silo overflow (total 12)' messages while
> downloading large files.
> 
> 3.5-STABLE produced such messages only after switching to another
> console during file download. All connections were made to the same
> ISP by pppd with same options.
> 
> System configuration: Pentium III (600MHz) with 320Mb RAM, Courier
> V.Everything 56K external modem at /dev/cuaa1.


Something is blocking interrupts for too long.  
Make sure you've got decent FIFOs on your serial port...