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Message-ID: <CAF6-1L79tec_0L7xuEDznjGQdwZQV34CgdNuGo=TJ4dPGTHZag@mail.gmail.com>
Date: Tue, 21 Aug 2012 17:13:43 +0200
From: Sylvain Munaut <s.munaut@...tever-company.com>
To: netdev@...r.kernel.org
Subject: netconsole leads to stalled CPU task
Hi,
I'm trying to use the netconsole to feed kernel message to the outside
but this lead to a stall ...
This only happens in a fairly specific configuration where you have a
bridge over vlan over bonding.
I tested with only (bridge over vlan) and (vlan over bonding) and
those work fine.
bash# modprobe netconsole
netconsole=8888@...208.1.30/mgmt,8000@...208.1.3/00:16:3e:1a:37:37
[... never returns ... ]
dmesg:
[ 130.672942] netpoll: netconsole: local port 8888
[ 130.673206] netpoll: netconsole: local IP 10.208.1.30
[ 130.673460] netpoll: netconsole: interface 'mgmt'
[ 130.673735] netpoll: netconsole: remote port 8000
[ 130.673984] netpoll: netconsole: remote IP 10.208.1.3
[ 130.674231] netpoll: netconsole: remote ethernet address 00:16:3e:1a:37:37
[ 132.975290] console [netcon0] enabled
[ 132.975541] netconsole: network logging started
[ 190.677624] INFO: rcu_preempt detected stalls on CPUs/tasks: { 15}
(detected by 2, t=60002 jiffies)
[ 190.678218] INFO: Stall ended before state dump start
[ 370.682595] INFO: rcu_preempt detected stalls on CPUs/tasks: { 15}
(detected by 2, t=240007 jiffies)
[ 370.683197] INFO: Stall ended before state dump start
[ 451.664596] INFO: rcu_bh detected stalls on CPUs/tasks: { 15}
(detected by 16, t=60004 jiffies)
[ 451.665190] INFO: Stall ended before state dump start
[ 550.687619] INFO: rcu_preempt detected stalls on CPUs/tasks: { 15}
(detected by 16, t=420012 jiffies)
[ 550.688211] INFO: Stall ended before state dump start
[ 631.669621] INFO: rcu_bh detected stalls on CPUs/tasks: { 15}
(detected by 2, t=240009 jiffies)
[ 631.670220] INFO: Stall ended before state dump start
ifconfig:
bond0 Link encap:Ethernet HWaddr 18:03:73:ed:67:ad
inet6 addr: fe80::1a03:73ff:feed:67ad/64 Scope:Link
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:735 errors:0 dropped:1 overruns:0 frame:0
TX packets:127 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:99136 (96.8 KiB) TX bytes:40635 (39.6 KiB)
bond0.1 Link encap:Ethernet HWaddr 18:03:73:ed:67:ad
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:283 errors:0 dropped:0 overruns:0 frame:0
TX packets:108 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:41948 (40.9 KiB) TX bytes:37915 (37.0 KiB)
eth0 Link encap:Ethernet HWaddr 18:03:73:ed:67:ad
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:450 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:52085 (50.8 KiB) TX bytes:1053 (1.0 KiB)
eth2 Link encap:Ethernet HWaddr 18:03:73:ed:67:ad
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:285 errors:0 dropped:1 overruns:0 frame:0
TX packets:117 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:47051 (45.9 KiB) TX bytes:39582 (38.6 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
mgmt Link encap:Ethernet HWaddr 18:03:73:ed:67:ad
inet addr:10.208.1.30 Bcast:10.208.1.255 Mask:255.255.255.0
inet6 addr: fe80::1a03:73ff:feed:67ad/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:280 errors:0 dropped:0 overruns:0 frame:0
TX packets:108 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:41713 (40.7 KiB) TX bytes:37915 (37.0 KiB)
Cheers,
Sylvain
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