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Date:      Wed, 13 May 1998 00:38:37 +0100
From:      Brian Somers <brian@Awfulhak.org>
To:        "Forrest W. Christian" <forrestc@iMach.com>
Cc:        Brian Somers <brian@Awfulhak.org>, stable@FreeBSD.ORG, brian@FreeBSD.ORG
Subject:   Re: PPP hard lock in 2.2.6 
Message-ID:  <199805122338.AAA14458@awfulhak.org>
In-Reply-To: Your message of "Tue, 12 May 1998 17:01:47 MDT." <Pine.BSF.3.96.980512165323.23230A-100000@workhorse.iMach.com> 

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> Ok, I've played some more and even compiled and installed the ppp from
> -current. 
> 
> This is definately a case of PPP doing something the kernel doesn't like.
> I haven't had this machine (yet) do anything else I'd define as wierd.  In
> fact, it feels more stable than any other box I've installed recently.
> 
> Let me ask these two questions:
> 
> 1)  What EXACTLY is the best way to get MAXIMUM verbosity out of PPP,
> preferably to the console, so we can tell where this thing is locking?

At the ppp prompt:

  set log local async carrier ccp chat command connect debug hdlc id0 
ipcp lcp link lqm phase tcp/ip

> 2)  Do you have a quick and dirty answer to the question of how to best do
> a debuging session which will likely get us near what this thing is doing
> which is locking this box?

This is tricky if the machine's just hanging....  See if it 
mis-behaves with a GENERIC kernel.  If it does, help will be easier 
:-)  Apart from that, it's a matter of trying to cause the crash with 
the minimum effort, then maybe sprinkling printf()s into the kernel 
in likely places 'till you hit something interesting... I'm not 
expert though.

> - Forrest W. Christian (forrestc@imach.com) 
> ----------------------------------------------------------------------
> iMach, Ltd., P.O. Box 5749, Helena, MT 59604      http://www.imach.com
> Solutions for your high-tech problems.                  (406)-442-6648
> ----------------------------------------------------------------------

-- 
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org>
      <http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....



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