Date: Wed, 07 Nov 2007 10:52:42 +0200 From: Stefan Lambrev <stefan.lambrev@moneybookers.com> To: freebsd-current@freebsd.org Subject: Re: rtfree: 0xc741ee88 has 1 refs Message-ID: <47317CDA.5060401@moneybookers.com> In-Reply-To: <473170E6.8020201@moneybookers.com> References: <472B1E89.5080006@moneybookers.com> <47303578.8060703@moneybookers.com> <4730AA30.7090607@intersonic.se> <473170E6.8020201@moneybookers.com>
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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
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