FreeBSD 9 w/ MPD5 crashes as LNS with 300+ tunnels. Netgraph issue?

[noc at hostelnet.ru]

15.06.2014 17:09, Mark van der Meulen пишет:
> Hi List,
>
> I¹m wondering if anyone can help me with this problem or at least help
> point me in the direction of where to start looking? I have FreeBSD 9
> based servers which are crashing every 4-10 days and producing crash dumps
> similar to this one: http://pastebin.com/F82Jc08C
>

Since we have similar situation - try use 8-stable.
We used FreeBSD 9-stable (from r259072 to r262224) with 150-300 PPPoE 
tunnels (mpd 5.7) and it randomly crashing 1-2 times in month. Some 
times ago one server was rolled back to 8-stable (r259629) - it never 
crashed since december 2013, while on server with 9-stable already got 8 
crash dumps.
Both systems have same hardware, GENERIC kernels, same pkgs versions and 
same configs:
/boot/loader.conf:
net.isr.maxthreads=2
net.isr.numthreads=2
net.graph.maxdata=65536
net.graph.maxalloc=65536
net.isr.defaultqlimit=4096
net.link.ifqmaxlen=10240

/etc/sysctl.conf:
net.inet.ip.fastforwarding=1
net.inet.ip.redirect=0
kern.random.sys.harvest.ethernet=0
kern.random.sys.harvest.point_to_point=0
kern.random.sys.harvest.interrupt=0
net.inet.raw.maxdgram=16384
net.inet.raw.recvspace=16384
net.inet.ip.intr_queue_maxlen=10240
net.route.netisr_maxqlen=4096