From owner-freebsd-current@FreeBSD.ORG Wed Nov 7 10:55:32 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 19C4C16A420 for ; Wed, 7 Nov 2007 10:55:32 +0000 (UTC) (envelope-from stefan.lambrev@moneybookers.com) Received: from blah.sun-fish.com (blah.sun-fish.com [217.18.249.150]) by mx1.freebsd.org (Postfix) with ESMTP id 8E2CF13C480 for ; Wed, 7 Nov 2007 10:55:31 +0000 (UTC) (envelope-from stefan.lambrev@moneybookers.com) Received: by blah.sun-fish.com (Postfix, from userid 1002) id CE3A51B10EEE; Wed, 7 Nov 2007 11:55:22 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on blah.cmotd.com X-Spam-Level: X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.2.3 Received: from hater.haters.org (hater.cmotd.com [192.168.3.125]) by blah.sun-fish.com (Postfix) with ESMTP id EF78E1B10EBB for ; Wed, 7 Nov 2007 11:55:19 +0100 (CET) Message-ID: <47319997.6000503@moneybookers.com> Date: Wed, 07 Nov 2007 12:55:19 +0200 From: Stefan Lambrev User-Agent: Thunderbird 2.0.0.6 (X11/20071105) MIME-Version: 1.0 To: freebsd-current@freebsd.org References: <472B1E89.5080006@moneybookers.com> <47303578.8060703@moneybookers.com> <4730AA30.7090607@intersonic.se> <473170E6.8020201@moneybookers.com> <47317CDA.5060401@moneybookers.com> In-Reply-To: <47317CDA.5060401@moneybookers.com> Content-Type: text/plain; charset=windows-1251; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.91.2/4691/Wed Nov 7 06:39:41 2007 on blah.cmotd.com X-Virus-Status: Clean Subject: Re: rtfree: 0xc741ee88 has 1 refs X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Nov 2007 10:55:32 -0000 Hi, I compiled kernel with all debug stuff in it, but I'm not sure what to do next :) I have serial console to the server so I boot with -dDh and enter debig mode. I can enter at debug mode at any time now, so any idea how to catch what trigger this rtfree ? :) I'm following steps from http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-online-ddb.html What info should I provide? Stefan Lambrev wrote: > Hi, > > Just to confirm that after reboot I'm seeing imediately rtfree: %P has > 1 refs. > > I'll recompile kernel with debug and will try to find out more. > > Stefan Lambrev wrote: >> Hi, >> >> Per olof Ljungmark wrote: >>> Stefan Lambrev wrote: >>>> Hi, >>>> >>>> Sorry to reply to myself, but I found that the problem exist only >>>> if the GW is carp interface, e.g. 10.1.1.1 sits on carp0 on default >>>> GW. >>>> I'm still testing how to reproduce this in my test lab and will >>>> fill a PR. >>>> >>>> Stefan Lambrev wrote: >>>>> Hi, >>>>> >>>>> I see rtfree: 0xc741ee88 has 1 refs with freebsd releng_7 (i386) >>>>> from today. >>>>> >>>>> I think it's easy reproducible. What I have is: >>>>> >>>>> releng_7 (10.1.1.2) -> default GW (10.1.1.1) >>>>> on default GW I have route to 10.10.1.1/24 -> 10.1.1.3 >>>>> >>>>> so everytime when 10.1.1.2 try to contact someone from >>>>> 10.10.1.1/24 I see: >>>>> rtfree: 0xc741ee88 has 1 refs >>>>> >>>>> if I add direct route on 10.1.1.2 to 10.10.1.1/24 through 10.1.1.3 >>>>> the message will go away. >>>>> >>>>> Should I ignore this msg for now, or should I expect kernel panic >>>>> soon? :) >>> >>> Just FYI, I see this on a few boxes including the 7-BETA2 I'm >>> writing this on. None of them has a carp interface though. What I >>> find interesting here is that none of them are able to run a SMP >>> kernel without crashing (no panic, they're just frozen completely). >>> >>> Perhaps it is a coincidence, I don't know, but I am very interested >>> in your findings and have testbeds if you need. >>> >>> --per >> In the begging I thought this is very easy reproducible, but it isn't :) >> In my situation the IP of the default GW sits on carp interface (the >> host have nothing to do with carp) >> and when the host receive icmp redirect messages they actually are >> send from the IP of the netwrok card of the GW (not the IP that sits >> on carp0) >> then the host things that those icmp type 5 are spoofed and just >> ignore them and do not add shorter route. >> In this situation after reboot the hosts start to moan about rtfree, >> so I played with routes and settings, added manually routes and now >> when I restore everything to previous state >> I do not see anymore rtfree warnings. So may be once the route is >> created manually and then removed, wrong call of rtfree is not >> triggered anymore. >> I'll reboot the host latter to see if this easy reproducible at least >> on reboot, and if it is, I'll compile debug kernel and will run >> backtrace. >> >> The other thing that bother me is that icmp redirects are not send >> from the carpIP, but from the real interface's IP? Isn't this a bug, >> or it is normal behavior? >> > -- Best Wishes, Stefan Lambrev ICQ# 24134177