From owner-freebsd-hackers  Thu Oct 30 18:46:23 1997
Return-Path: <owner-freebsd-hackers>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id SAA03734
          for hackers-outgoing; Thu, 30 Oct 1997 18:46:23 -0800 (PST)
          (envelope-from owner-freebsd-hackers)
Received: from sky.fit.qut.edu.au (root@sky.fit.qut.edu.au [131.181.2.4])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id SAA03725;
          Thu, 30 Oct 1997 18:46:14 -0800 (PST)
          (envelope-from steve@russell.icis.qut.edu.au)
Received: from packman.icis.qut.edu.au (root@packman.icis.qut.edu.au [131.181.70.70])
	by sky.fit.qut.edu.au (8.8.5/8.8.5/tony) with ESMTP id MAA02037;
	Fri, 31 Oct 1997 12:46:00 +1000 (EST)
Received: from russell.icis.qut.edu.au (russell.icis.qut.edu.au [131.181.70.49]) by packman.icis.qut.edu.au (8.7.1/8.7.1) with ESMTP id MAA24901; Fri, 31 Oct 1997 12:32:34 +1000 (EST)
Received: (from steve@localhost) by russell.icis.qut.edu.au (8.7.1/8.7.1) id MAA11633; Fri, 31 Oct 1997 12:47:47 +1000 (EST)
Date: Fri, 31 Oct 1997 12:47:47 +1000 (EST)
From: Steve Milliner <steve@icis.qut.edu.au>
Message-Id: <199710310247.MAA11633@russell.icis.qut.edu.au>
To: freebsd-isp@freebsd.org
Subject: Re: modem transmision problems??
Cc: freebsd-hackers@freebsd.org
X-Sun-Charset: US-ASCII
Sender: owner-freebsd-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

RECAP: modem overflow problem

/kernel: sio3: 78 more tty-level buffer overflows

occurs: during mail delivery.

tried: decreasing build up of mail on queue to stop flooding modem


> Are you using user-mode ppp?  If so, it sounds like the machine is
> heavily loaded and the ppp process is being starved of CPU for extended 
> periods of time.
> 

Yep using user ppp.

AS for load - not really (98% idle) - not heavy enough to cause 
starvation in any case - which kind of suggests its a sending
rather than receiving problem I guess??

Does anyone know if there are problems with how hang-ups
on the client side are handled by FBSD - ie. the mail starts to get pushed
on to the device, part way through the connection goes down, but data
is still pushed on to the modem which now (obviously) 
can't get rid of it ?? but I find it hard to believe that this case would
not be handeled (ie. sync sending of data to modem) ???? 

I guess I could go on making up little stories all week, 
SO Any solutions/experiences (especially solutions :>)
would be VERY gratefully reveived!

thanks in advance


REGS Stephen