Getting messages like that sometimes. Is it related to this bug ?
Sep 19 08:12:13 jubjub kernel: [69946.363558] WARNING: at
/build/buildd/linux-2.6.32/net/ipv4/tcp_input.c:2540
tcp_mark_head_lost+0x214/0x230()
Sep 19 08:12:13 jubjub kernel: [69946.363562] Hardware name: To Be Filled By
O.E.M.
Sep 19 08:12:13 jubjub kernel: [69946.363565] Modules linked in: iptable_filter
ip_tables x_tables fbcon tileblit font bitblit softcursor vga16fb vgastate aufs
i915 w83627ehf hwmon_vid coretemp drm_kms_helper intel_agp drm i2c_algo_bit
video output lp parport usb_storage r8169 mii
Sep 19 08:12:13 jubjub kernel: [69946.363602] Pid: 0, comm: swapper Tainted: G
W 2.6.32-24-generic #43-Ubuntu
Sep 19 08:12:13 jubjub kernel: [69946.363606] Call Trace:
Sep 19 08:12:13 jubjub kernel: [69946.363609] <IRQ> [<ffffffff81066ddb>]
warn_slowpath_common+0x7b/0xc0
Sep 19 08:12:13 jubjub kernel: [69946.363622] [<ffffffff81066e34>]
warn_slowpath_null+0x14/0x20
Sep 19 08:12:13 jubjub kernel: [69946.363628] [<ffffffff814a0ad4>]
tcp_mark_head_lost+0x214/0x230
Sep 19 08:12:13 jubjub kernel: [69946.363634] [<ffffffff814a0c3a>]
tcp_update_scoreboard+0x14a/0x200
Sep 19 08:12:13 jubjub kernel: [69946.363640] [<ffffffff814a5fd3>]
tcp_fastretrans_alert+0x383/0xd90
Sep 19 08:12:13 jubjub kernel: [69946.363646] [<ffffffff814a7474>]
tcp_ack+0x284/0x6b0
Sep 19 08:12:13 jubjub kernel: [69946.363652] [<ffffffff814a8373>]
tcp_rcv_established+0x573/0x730
Sep 19 08:12:13 jubjub kernel: [69946.363658] [<ffffffff814afca3>]
tcp_v4_do_rcv+0xf3/0x160
Sep 19 08:12:13 jubjub kernel: [69946.363663] [<ffffffff814b13f5>]
tcp_v4_rcv+0x5b5/0x7e0
Sep 19 08:12:13 jubjub kernel: [69946.363668] [<ffffffff8148f2f0>] ?
ip_local_deliver_finish+0x0/0x2d0
Sep 19 08:12:13 jubjub kernel: [69946.363675] [<ffffffff81486d94>] ?
nf_hook_slow+0x74/0x100
Sep 19 08:12:13 jubjub kernel: [69946.363680] [<ffffffff8148f2f0>] ?
ip_local_deliver_finish+0x0/0x2d0
Sep 19 08:12:13 jubjub kernel: [69946.363685] [<ffffffff8148f3cd>]
ip_local_deliver_finish+0xdd/0x2d0
Sep 19 08:12:13 jubjub kernel: [69946.363690] [<ffffffff8148f650>]
ip_local_deliver+0x90/0xa0
Sep 19 08:12:13 jubjub kernel: [69946.363695] [<ffffffff8148eb0d>]
ip_rcv_finish+0x12d/0x440
Sep 19 08:12:13 jubjub kernel: [69946.363700] [<ffffffff8148f095>]
ip_rcv+0x275/0x360
Sep 19 08:12:13 jubjub kernel: [69946.363707] [<ffffffff8145f72a>]
netif_receive_skb+0x38a/0x5d0
Sep 19 08:12:13 jubjub kernel: [69946.363718] [<ffffffffa000b40f>]
rtl8169_rx_interrupt+0x8f/0x5b0 [r8169]
Sep 19 08:12:13 jubjub kernel: [69946.363726] [<ffffffffa000baad>]
rtl8169_poll+0x3d/0x270 [r8169]
Sep 19 08:12:13 jubjub kernel: [69946.363733] [<ffffffff810397a9>] ?
default_spin_lock_flags+0x9/0x10
Sep 19 08:12:13 jubjub kernel: [69946.363739] [<ffffffff8146021f>]
net_rx_action+0x10f/0x250
Sep 19 08:12:13 jubjub kernel: [69946.363746] [<ffffffffa000954e>] ?
rtl8169_interrupt+0xde/0x1e0 [r8169]
Sep 19 08:12:13 jubjub kernel: [69946.363753] [<ffffffff8106e487>]
__do_softirq+0xb7/0x1e0
Sep 19 08:12:13 jubjub kernel: [69946.363759] [<ffffffff810c5330>] ?
handle_IRQ_event+0x60/0x170
Sep 19 08:12:13 jubjub kernel: [69946.363765] [<ffffffff810142ec>]
call_softirq+0x1c/0x30
Sep 19 08:12:13 jubjub kernel: [69946.363770] [<ffffffff81015cb5>]
do_softirq+0x65/0xa0
Sep 19 08:12:13 jubjub kernel: [69946.363775] [<ffffffff8106e325>]
irq_exit+0x85/0x90
Sep 19 08:12:13 jubjub kernel: [69946.363781] [<ffffffff815494a5>]
do_IRQ+0x75/0xf0
Sep 19 08:12:13 jubjub kernel: [69946.363786] [<ffffffff81013b13>]
ret_from_intr+0x0/0x11
Sep 19 08:12:13 jubjub kernel: [69946.363789] <EOI> [<ffffffff8101b5a1>] ?
mwait_idle+0x71/0xd0
Sep 19 08:12:13 jubjub kernel: [69946.363799] [<ffffffff8154712a>] ?
atomic_notifier_call_chain+0x1a/0x20
Sep 19 08:12:13 jubjub kernel: [69946.363805] [<ffffffff81011e73>] ?
cpu_idle+0xb3/0x110
Sep 19 08:12:13 jubjub kernel: [69946.363811] [<ffffffff8153e20e>] ?
start_secondary+0xa8/0xaa
Sep 19 08:12:13 jubjub kernel: [69946.363816] ---[ end trace 0678bd0a81405ae0
]---
--
WARNING: at /build/buildd/linux-2.6.32/net/ipv4/tcp_input.c:2540
tcp_mark_head_lost+0x1d1/0x1f0()
https://bugs.launchpad.net/bugs/552218
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