Date: Tue, 09 Sep 1997 23:37:07 +0100 From: Brian Somers <brian@awfulhak.org> To: Heikki Suonsivu <hsu@mail.clinet.fi> Cc: Brian Somers <brian@FreeBSD.ORG>, hsu@clinet.fi, freebsd-bugs@FreeBSD.ORG Subject: Re: kern/1293 Message-ID: <199709092237.XAA17824@awfulhak.demon.co.uk> In-Reply-To: Your message of "Tue, 09 Sep 1997 17:19:13 %2B0300." <199709091419.RAA18239@katiska.clinet.fi>
next in thread | previous in thread | raw e-mail | index | archive | help
>
> Brian Somers writes:
> > Synopsis: Fatal trap 12: page fault while in kernel mode (PPP/modems/cyclades?)
> >
> > State-Changed-From-To: feedback-closed
> > State-Changed-By: brian
> > State-Changed-When: Mon Sep 8 14:00:11 PDT 1997
> > State-Changed-Why:
> > I suspect this was the vjcompression thing. I sent mail to
> > the bug submitter, but never got a reply.
>
> I must have missed it. Aug 31 kernel (2.2-stable) has still crashed couple
> of times. What kind of symptoms "vjcompression thing" fixed and when ?
This is the fix I was talking about, but it was committed back in
June, so it looks like it didn't solve your problem:
revision 1.10
date: 1997/06/22 02:19:53; author: brian; state: Exp; lines: +5 -1
Fix this damn mbuf with a negative m_len. It turns
out to be a problem with VJ header compression.
davidg spotted this in usr.sbin/ppp/slcompress.c
a while ago, but I believe gave the wrong reasons -
it's too easy to reproduce ! The only scenario that
I've been able to reproduce the problem under is when
m_len is *exactly* 40 ! So go figure !
PR: 3749
Submitted elsewhere by: davidg
Obtained from: usr.sbin/ppp/slcompress.c
Have you tried disabling vj and predictor compression ? It may make
a difference. Also, have you tried using user-mode ppp. If this
didn't work, we'd have access to a far more flexible logging system.
> --
> Heikki Suonsivu, T{ysikuu 10 C 83/02210 Espoo/FINLAND, hsu@clinet.fi
> mobile +358-40-5519679 work +358-9-43542270 fax -4555276
--
Brian <brian@awfulhak.org>, <brian@freebsd.org>
<http://www.awfulhak.org>;
Don't _EVER_ lose your sense of humour....
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199709092237.XAA17824>