From owner-freebsd-bugs  Wed Apr 30 01:10:51 1997
Return-Path: <owner-bugs>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id BAA13698
          for bugs-outgoing; Wed, 30 Apr 1997 01:10:51 -0700 (PDT)
Received: from spinner.DIALix.COM (spinner.dialix.com [192.203.228.67])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id BAA13687
          for <freebsd-bugs@freebsd.org>; Wed, 30 Apr 1997 01:10:44 -0700 (PDT)
Received: from spinner.DIALix.COM (localhost.DIALix.oz.au [127.0.0.1])
          by spinner.DIALix.COM with ESMTP id QAA04923;
          Wed, 30 Apr 1997 16:09:52 +0800 (WST)
Message-Id: <199704300809.QAA04923@spinner.DIALix.COM>
To: Doug Rabson <dfr@nlsystems.com>
cc: Rusell Cattelan <cattelan@thebarn.com>, freebsd-bugs@freebsd.org
Subject: Re: pppd hangs or reboots machine. 
In-reply-to: Your message of "Wed, 30 Apr 1997 08:36:47 +0100."
             <Pine.BSF.3.95q.970430083354.13137H-100000@herring.nlsystems.com> 
Date: Wed, 30 Apr 1997 16:09:51 +0800
From: Peter Wemm <peter@spinner.DIALix.COM>
Sender: owner-bugs@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

Doug Rabson wrote:
> > Any suggestions?
> 
> I was digging through the code in isa.c which calculates interrupt masks
> and I noticed that it special cases SLIP to make sure that all ttys
> interupts are masked by splnet but doesn't do the same for kernel-mode
> ppp.  This was an old bug I fixed in the 2.0 days; it seems to have
> reappeared.

No, this isn't necessary for kernel-mode ppp any more because it does it
itself.  The other reason is that the mutual exclusion is asymmetric, but
I don't remember which way.  ie: spltty blocks splnet, but splnet doesn't
block spltty - but it might be the other way around.

Cheers,
-Peter