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To: Steve Milliner <steve@icis.qut.edu.au>
cc: freebsd-isp@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG
Subject: Re: modem transmision problems?? 
In-reply-to: Your message of "Fri, 31 Oct 1997 12:47:47 +1000."
             <199710310247.MAA11633@russell.icis.qut.edu.au> 
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Date: Fri, 31 Oct 1997 17:07:22 +1030
From: Mike Smith <mike@smith.net.au>
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> 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.

Ok.

> 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??

No.  Read the manpage entry I posted *again*.  It refers to data 
*arriving* and not being dealt with.

> 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 don't understand what you are saying; do you mean that these messages 
are only ever seen when the line drops?

mike