From owner-freebsd-net@FreeBSD.ORG Thu Apr 16 09:30:07 2009 Return-Path: Delivered-To: freebsd-net@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B36151065674 for ; Thu, 16 Apr 2009 09:30:07 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 875B28FC08 for ; Thu, 16 Apr 2009 09:30:07 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id n3G9U7NT090206 for ; Thu, 16 Apr 2009 09:30:07 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.3/8.14.3/Submit) id n3G9U7kh090202; Thu, 16 Apr 2009 09:30:07 GMT (envelope-from gnats) Date: Thu, 16 Apr 2009 09:30:07 GMT Message-Id: <200904160930.n3G9U7kh090202@freefall.freebsd.org> To: freebsd-net@FreeBSD.org From: Dennis Melentyev Cc: Subject: Re: kern/133572: [ppp] [hang] incoming PPTP connection hangs the system X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Dennis Melentyev List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Apr 2009 09:30:08 -0000 The following reply was made to PR kern/133572; it has been noted by GNATS. From: Dennis Melentyev To: Max Laier Cc: bug-followup@freebsd.org Subject: Re: kern/133572: [ppp] [hang] incoming PPTP connection hangs the system Date: Thu, 16 Apr 2009 12:28:46 +0300 Hi Max, Just read your discussion with Matt and Rembrandt on DragonflyBSD list on OpenBSD's PF issues. Although I can't afford to restore the configuration to test the issue, but I feel, that problem could be connected to IPv6 + PPTP/GRE/PF/IPv4. The machine we've tried to connect from was running Vista. AFAIR, it tries to make some use of IPv6. Can't tell anything on XP or other clients - never tried that. OTOH, outgoing PPTP (IPv4) session from MPD4 to some HW VPN router (sorry, anonymous to me) was just fine. Hope this helps. I can't upgrade ATM, but still can supply config files if needed. /dennis 2009/4/15 Dennis Melentyev : > Hi Max, > > It was some hard time for me, sorry for late response. > > I did enabled KDB, DDB and WITNESS on the same sources. > Unfortunately there was just plain hangs once some GRE was trying to > get through (netgraph? PF? routing?) > With these options enabled, hangs are much more often than without them. > Once hung, no way to break into debugger, no panics, numlock not > changing lights on keyboard, mouse not responding, hdd silent, network > not available, nothing. > > 3 different HW platforms were tried (all of them were UP+i386+32bit). > Highest CPU temperature was 52C. No chance to go with 7.2-PRERELEASE. > > Had to downgrade to 7.1-RELEASE. > > /dennis > > 2009/4/11 Max Laier : >> Is it possible for you to turn on WITNESS on this machine to obtain poss= ible >> LORs that might be responsible for the hang? =C2=A0Also, do you have the >> possibility to enable DDB and drop into it from the console (if it is no= t a >> hard hang but a live lock)? >> >> -- >> =C2=A0Max >> > > > > -- > Dennis Melentyev > --=20 Dennis Melentyev