Comment 72 for bug 454747

Since I upgraded to Lucid 2 days ago I'm struck by this error, too. Never had any problems with karmic, though.
Symptoms are the same: Network gets unresponsive under heavy load.

Aug 29 16:42:50 COMPAKT kernel: [ 404.000051] ------------[ cut here ]------------
Aug 29 16:42:50 COMPAKT kernel: [ 404.000078] WARNING: at /build/buildd/linux-2.6.32/net/sched/sch_generic.c:261 dev_watchdog+0x1fe/0x210()
Aug 29 16:42:50 COMPAKT kernel: [ 404.000087] Hardware name: Evo N620c (DC824AV)
Aug 29 16:42:50 COMPAKT kernel: [ 404.000095] NETDEV WATCHDOG: eth0 (tg3): transmit queue 0 timed out
Aug 29 16:42:50 COMPAKT kernel: [ 404.000102] Modules linked in: binfmt_misc ppdev nfsd exportfs snd_intel8x0 nfs lockd snd_ac97_codec ac97_bus nfs_acl fbcon tileblit font snd_pcm_oss bitblit softcursor snd_mixer_oss snd_pcm auth_rpcgss vga16fb snd_seq_dummy sunrpc snd_seq_oss vgastate snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device joydev snd radeon soundcore ttm drm_kms_helper pcmcia snd_page_alloc drm i2c_algo_bit yenta_socket rsrc_nonstatic pcmcia_core psmouse video serio_raw intel_agp agpgart shpchp output usbhid hid lp parport tg3
Aug 29 16:42:50 COMPAKT kernel: [ 404.000239] Pid: 0, comm: swapper Not tainted 2.6.32-24-generic #41-Ubuntu
Aug 29 16:42:50 COMPAKT kernel: [ 404.000247] Call Trace:
Aug 29 16:42:50 COMPAKT kernel: [ 404.000263] [<c014c4a2>] warn_slowpath_common+0x72/0xa0
Aug 29 16:42:50 COMPAKT kernel: [ 404.000276] [<c04d996e>] ? dev_watchdog+0x1fe/0x210
Aug 29 16:42:50 COMPAKT kernel: [ 404.000286] [<c04d996e>] ? dev_watchdog+0x1fe/0x210
Aug 29 16:42:50 COMPAKT kernel: [ 404.000298] [<c014c51b>] warn_slowpath_fmt+0x2b/0x30
Aug 29 16:42:50 COMPAKT kernel: [ 404.000309] [<c04d996e>] dev_watchdog+0x1fe/0x210
Aug 29 16:42:50 COMPAKT kernel: [ 404.000325] [<c0163a50>] ? insert_work+0x60/0xb0
Aug 29 16:42:50 COMPAKT kernel: [ 404.000340] [<c012a498>] ? default_spin_lock_flags+0x8/0x10
Aug 29 16:42:50 COMPAKT kernel: [ 404.000353] [<c058cdcf>] ? _spin_lock_irqsave+0x2f/0x50
Aug 29 16:42:50 COMPAKT kernel: [ 404.000365] [<c0163d16>] ? __queue_work+0x36/0x50
Aug 29 16:42:50 COMPAKT kernel: [ 404.000376] [<c015b70e>] run_timer_softirq+0x13e/0x2c0
Aug 29 16:42:50 COMPAKT kernel: [ 404.000388] [<c04d9770>] ? dev_watchdog+0x0/0x210
Aug 29 16:42:50 COMPAKT kernel: [ 404.000400] [<c0153138>] __do_softirq+0x98/0x1b0
Aug 29 16:42:50 COMPAKT kernel: [ 404.000411] [<c012a498>] ? default_spin_lock_flags+0x8/0x10
Aug 29 16:42:50 COMPAKT kernel: [ 404.000423] [<c058cdcf>] ? _spin_lock_irqsave+0x2f/0x50
Aug 29 16:42:50 COMPAKT kernel: [ 404.000437] [<c0106c87>] ? enable_8259A_irq+0x47/0x70
Aug 29 16:42:50 COMPAKT kernel: [ 404.000448] [<c0153295>] do_softirq+0x45/0x50
Aug 29 16:42:50 COMPAKT kernel: [ 404.000458] [<c01533e5>] irq_exit+0x65/0x70
Aug 29 16:42:50 COMPAKT kernel: [ 404.000469] [<c0591245>] do_IRQ+0x55/0xc0
Aug 29 16:42:50 COMPAKT kernel: [ 404.000481] [<c016d5c5>] ? sched_clock_local+0xa5/0x180
Aug 29 16:42:50 COMPAKT kernel: [ 404.000493] [<c0103a30>] common_interrupt+0x30/0x40
Aug 29 16:42:50 COMPAKT kernel: [ 404.000504] [<c016007b>] ? sys_getrusage+0x2b/0x30
Aug 29 16:42:50 COMPAKT kernel: [ 404.000517] [<c039e22b>] ? acpi_idle_enter_simple+0x117/0x148
Aug 29 16:42:50 COMPAKT kernel: [ 404.000529] [<c039df41>] acpi_idle_enter_bm+0xc7/0x29a
Aug 29 16:42:50 COMPAKT kernel: [ 404.000543] [<c04a1e8a>] cpuidle_idle_call+0x7a/0x100
Aug 29 16:42:50 COMPAKT kernel: [ 404.000554] [<c01021d4>] cpu_idle+0x94/0xd0
Aug 29 16:42:50 COMPAKT kernel: [ 404.000568] [<c057a818>] rest_init+0x58/0x60
Aug 29 16:42:50 COMPAKT kernel: [ 404.000582] [<c07a58ec>] start_kernel+0x351/0x357
Aug 29 16:42:50 COMPAKT kernel: [ 404.000594] [<c07a53c7>] ? unknown_bootoption+0x0/0x19e
Aug 29 16:42:50 COMPAKT kernel: [ 404.000606] [<c07a50aa>] i386_start_kernel+0xaa/0xb1
Aug 29 16:42:50 COMPAKT kernel: [ 404.000614] ---[ end trace 3b3f35df98f5d5c2 ]---