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    SubjectRe: 2.6.37-rc1-git5 -- WARNING: at net/ipv4/devinet.c:137 in_dev_finish_destroy+0x3d/0x6e()
    On Mon, Nov 08, 2010 at 09:46:31PM +0100, Eric Dumazet wrote:
    > Le lundi 08 novembre 2010 à 21:42 +0100, Markus Trippelsdorf a écrit :
    > > On Mon, Nov 08, 2010 at 09:29:26PM +0100, Eric Dumazet wrote:
    > > > Le lundi 08 novembre 2010 à 12:06 -0800, Paul E. McKenney a écrit :
    > > > > On Mon, Nov 08, 2010 at 02:56:06PM -0500, Miles Lane wrote:
    > > > > > WARNING: at net/ipv4/devinet.c:137 in_dev_finish_destroy+0x3d/0x6e()
    > > > >
    > > > > Ilpo, thoughts?
    > > > >
    > > >
    > > > Hmm...
    > > >
    > > > WARN_ON(idev->mc_list);
    > > >
    > > > Might be a problem with refcounts somewhere...
    > >
    > > I have similar warnings in my logs, although its at
    > > net/ipv4/devinet.c:136 in my case. Happened altogether three times in
    > > the last few days and they all look the same:
    > >
    > > Nov 5 17:31:35 arch kernel: WARNING: at net/ipv4/devinet.c:136 in_dev_finish_destroy+0x5c/0x90()
    > > Nov 5 17:31:35 arch kernel: Hardware name: System Product Name
    > > Nov 5 17:31:35 arch kernel: Pid: 0, comm: kworker/0:1 Not tainted 2.6.37-rc1-00027-gff8b16d-dirty #4
    > > Nov 5 17:31:35 arch kernel: Call Trace:
    > > Nov 5 17:31:35 arch kernel: <IRQ> [<ffffffff8105c9f6>] ? warn_slowpath_common+0x76/0xc0
    > > Nov 5 17:31:35 arch kernel: [<ffffffff8141889c>] ? in_dev_finish_destroy+0x5c/0x90
    > > Nov 5 17:31:35 arch kernel: [<ffffffff813c49e8>] ? dst_destroy+0x68/0x120
    > > Nov 5 17:31:35 arch kernel: [<ffffffff813e888f>] ? dst_rcu_free+0x1f/0x30
    > > Nov 5 17:31:35 arch kernel: [<ffffffff81090e0c>] ? __rcu_process_callbacks+0xfc/0x2f0
    > > Nov 5 17:31:35 arch kernel: [<ffffffff8109103f>] ? rcu_process_callbacks+0x3f/0x70
    > > Nov 5 17:31:35 arch kernel: [<ffffffff810621bc>] ? __do_softirq+0x9c/0x120
    > > Nov 5 17:31:35 arch kernel: [<ffffffff81030fc9>] ? timer_interrupt+0x19/0x30
    > > Nov 5 17:31:35 arch kernel: [<ffffffff8102ea4c>] ? call_softirq+0x1c/0x30
    > > Nov 5 17:31:35 arch kernel: [<ffffffff8103080d>] ? do_softirq+0x4d/0x80
    > > Nov 5 17:31:35 arch kernel: [<ffffffff8106232d>] ? irq_exit+0x8d/0x90
    > > Nov 5 17:31:35 arch kernel: [<ffffffff810306c7>] ? do_IRQ+0x67/0xe0
    > > Nov 5 17:31:35 arch kernel: [<ffffffff8144a153>] ? ret_from_intr+0x0/0xa
    > > Nov 5 17:31:35 arch kernel: <EOI> [<ffffffff81035ba0>] ? default_idle+0x20/0x40
    > > Nov 5 17:31:35 arch kernel: [<ffffffff81035c12>] ? c1e_idle+0x52/0xf0
    > > Nov 5 17:31:35 arch kernel: [<ffffffff8102c12c>] ? cpu_idle+0x4c/0xa0
    > > Nov 5 17:31:35 arch kernel: ---[ end trace 143683935de8f41f ]---
    > > Nov 5 17:31:35 arch kernel: Freeing alive in_device ffff88011ffba600
    > >
    >
    > Hmm....
    >
    > Is commit 1f1b9c9990205759aae31b7734b0ede41a867f32 present in your
    > kernel ? (fib: fib_result_assign() should not change fib refcounts)

    Yes, the last warning happend today on the lastest git kernel (from today).
    >
    > Could you provide some information ?
    >
    > ifconfig -a

    dummy0 Link encap:Ethernet HWaddr 76:FE:79:D4:80:DF
    BROADCAST NOARP MTU:1500 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)

    eth0 Link encap:Ethernet HWaddr 00:08:54:36:F2:2F
    inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
    UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
    RX packets:1945 errors:0 dropped:0 overruns:0 frame:0
    TX packets:1450 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:1910343 (1.8 Mb) TX bytes:177533 (173.3 Kb)
    Interrupt:20 Base address:0x6c00

    lo Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    UP LOOPBACK RUNNING MTU:16436 Metric:1
    RX packets:18321 errors:0 dropped:0 overruns:0 frame:0
    TX packets:18321 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:2200368 (2.0 Mb) TX bytes:2200368 (2.0 Mb)

    > ip ro

    192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.2
    default via 192.168.1.1 dev eth0

    --
    Markus
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