Hi !
Upgraded some servers from 7.2-stabel to 8.0-stable early april and since
then I have seen stability problems with 8.0 servers which use mpd (vpn).
I have tried several mpd version (5.5, 5.3 and 5.1), but the system freeze
within 6 hours or 3-5 days. Early in april we got typical watchdog timeout
error message just before the system freeze, but now we don't get any
error message.
Sometimes we also see that the mpd process goes into a none killeable
stauts, and then when I execute a "shutdown -r" the system hang with
this message :
stopping mpd5
Waiting for PIDS : 114830 second watchdog timeout expired. Shutdown terminated.
Apr 29 21:04:52 init : some process would not die; ps axl advised
Waiting (max 60 seconds) for system process 'vnlru' to stop...
We see this problem on both i386 and amd6 systems.
FreeBSD vpn-gw4.uib.no 8.0-STABLE FreeBSD 8.0-STABLE #0: Sun May 2
01:04:22 CEST 2010 r...@vpn-gw.uib.no:/usr/obj/usr/src/sys/VPN-GW amd64
# Netgraph
options NETGRAPH #netgraph(4) system
options NETGRAPH_BPF
options NETGRAPH_IFACE
options NETGRAPH_KSOCKET
options NETGRAPH_L2TP
options NETGRAPH_MPPC_ENCRYPTION
options NETGRAPH_PPP
options NETGRAPH_PPTPGRE
options NETGRAPH_SOCKET
options NETGRAPH_VJC
options NETGRAPH_NETFLOW
#
kern.ipc.shm_use_phys=1
kern.ipc.maxsockbuf=4194304
kern.ipc.somaxconn=4096
#
net.inet.tcp.sendspace=131072
net.inet.tcp.recvspace=262144
net.inet.tcp.syncookies=0
net.inet.tcp.inflight.enable=0
net.inet.tcp.reass.maxqlen=128
#
net.inet.ip.intr_queue_maxlen=512
net.inet.ip.redirect=0
net.inet.ip.process_options=0
#
net.inet.udp.recvspace=131072
#
net.inet.icmp.icmplim=2000
net.inet.icmp.drop_redirect=1
#
net.local.stream.recvspace=131072
net.local.stream.sendspace=131072
#
net.graph.recvspace=262144
net.graph.maxdgram=262144
Systems with low network traffic doesn't have this problem, only observed
on systems with ca +50 mpd tunnels or more. We also have other 8.0 servers
with high network load, but they doen't use Netgraph.
I don't have any core files, no crash files, etc so I can't give any more
info.
Downgrade to FreeBSD 7.3 solves the problem, but I would like to stay on
version 8.
--
Roar Pettersen
Universitetet i Bergen - The University of Bergen
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