Encountered this while building custom embedded distribution with the yocto project build system. This has never happened before for me, but google search showed quite a few similar reports.
Aug 13 15:42:12 quadpc kernel: [263676.682558] ------------[ cut here ]------------ Aug 13 15:42:12 quadpc kernel: [263676.682565] WARNING: at /build/buildd/linux-3.5.0/kernel/watchdog.c:242 watchdog_overflow_callback+0x9a/0xc0() Aug 13 15:42:12 quadpc kernel: [263676.682566] Hardware name: System Product Name Aug 13 15:42:12 quadpc kernel: [263676.682567] Watchdog detected hard LOCKUP on cpu 2 Aug 13 15:42:12 quadpc kernel: [263676.682568] Modules linked in: vmnet(O) parport_pc vsock(O) vmci(O) vmmon(O) rfcomm bnep bluetooth ppdev nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc snd_hda_codec_hdmi nvidia(PO) coretemp kvm_intel kvm snd_hda_codec_realtek ghash_clmulni_intel aesni_intel cryptd aes_x86_64 snd_hda_intel snd_hda_codec snd_usb_audio eeepc_wmi asus_wmi snd_usbmidi_lib sparse_keymap snd_seq_midi snd_seq_midi_event snd_rawmidi snd_hwdep snd_pcm snd_seq pl2303 usbserial snd_timer microcode snd_seq_device psmouse snd serio_raw joydev soundcore video mac_hid snd_page_alloc wmi lpc_ich mei lp parport hid_generic usbhid hid 3w_sas firewire_ohci firewire_core crc_itu_t e1000e usb_storage [last unloaded: parport_pc] Aug 13 15:42:12 quadpc kernel: [263676.682602] Pid: 10516, comm: flush-8:32 Tainted: P O 3.5.0-37-generic #58-Ubuntu Aug 13 15:42:12 quadpc kernel: [263676.682603] Call Trace: Aug 13 15:42:12 quadpc kernel: [263676.682604] <NMI> [<ffffffff81051bdf>] warn_slowpath_common+0x7f/0xc0 Aug 13 15:42:12 quadpc kernel: [263676.682611] [<ffffffff81051cd6>] warn_slowpath_fmt+0x46/0x50 Aug 13 15:42:12 quadpc kernel: [263676.682613] [<ffffffff810de930>] ? touch_nmi_watchdog+0x80/0x80 Aug 13 15:42:12 quadpc kernel: [263676.682615] [<ffffffff810de9ca>] watchdog_overflow_callback+0x9a/0xc0 Aug 13 15:42:12 quadpc kernel: [263676.682619] [<ffffffff8111af9d>] __perf_event_overflow+0x9d/0x230 Aug 13 15:42:12 quadpc kernel: [263676.682623] [<ffffffff81024067>] ? x86_perf_event_set_period+0xd7/0x160 Aug 13 15:42:12 quadpc kernel: [263676.682625] [<ffffffff8111bab4>] perf_event_overflow+0x14/0x20 Aug 13 15:42:12 quadpc kernel: [263676.682627] [<ffffffff81029473>] intel_pmu_handle_irq+0x193/0x310 Aug 13 15:42:12 quadpc kernel: [263676.682630] [<ffffffff81684add>] perf_event_nmi_handler+0x1d/0x20 Aug 13 15:42:12 quadpc kernel: [263676.682632] [<ffffffff81684289>] nmi_handle.isra.0+0x59/0x80 Aug 13 15:42:12 quadpc kernel: [263676.682634] [<ffffffff81684439>] do_nmi+0x189/0x360 Aug 13 15:42:12 quadpc kernel: [263676.682635] [<ffffffff816838bc>] end_repeat_nmi+0x1a/0x1e Aug 13 15:42:12 quadpc kernel: [263676.682638] [<ffffffff8103f995>] ? __ticket_spin_lock+0x25/0x30 Aug 13 15:42:12 quadpc kernel: [263676.682639] [<ffffffff8103f995>] ? __ticket_spin_lock+0x25/0x30 Aug 13 15:42:12 quadpc kernel: [263676.682641] [<ffffffff8103f995>] ? __ticket_spin_lock+0x25/0x30 Aug 13 15:42:12 quadpc kernel: [263676.682642] <<EOE>> [<ffffffff8103fa29>] default_spin_lock_flags+0x9/0x10 Aug 13 15:42:12 quadpc kernel: [263676.682646] [<ffffffff8168311e>] _raw_spin_lock_irqsave+0x2e/0x40 Aug 13 15:42:12 quadpc kernel: [263676.682648] [<ffffffff8112d24c>] test_set_page_writeback+0x8c/0x180 Aug 13 15:42:12 quadpc kernel: [263676.682652] [<ffffffff81224189>] ext4_bio_write_page+0x99/0x460 Aug 13 15:42:12 quadpc kernel: [263676.682655] [<ffffffff81126144>] ? find_get_pages+0xc4/0x150 Aug 13 15:42:12 quadpc kernel: [263676.682657] [<ffffffff8121fcec>] mpage_da_submit_io+0x4ec/0x5d0 Aug 13 15:42:12 quadpc kernel: [263676.682660] [<ffffffff812221e1>] ? mpage_da_map_and_submit+0x2c1/0x4b0 Aug 13 15:42:12 quadpc kernel: [263676.682662] [<ffffffff81220edf>] ? ext4_mark_inode_dirty+0x7f/0x1f0 Aug 13 15:42:12 quadpc kernel: [263676.682664] [<ffffffff8122203a>] mpage_da_map_and_submit+0x11a/0x4b0 Aug 13 15:42:12 quadpc kernel: [263676.682667] [<ffffffff81268e63>] ? jbd2_journal_start+0x13/0x20 Aug 13 15:42:12 quadpc kernel: [263676.682669] [<ffffffff81222c73>] ext4_da_writepages+0x363/0x5d0 Aug 13 15:42:12 quadpc kernel: [263676.682672] [<ffffffff8112ea1e>] do_writepages+0x1e/0x40 Aug 13 15:42:12 quadpc kernel: [263676.682674] [<ffffffff811ab0eb>] __writeback_single_inode.isra.32+0x3b/0x160 Aug 13 15:42:12 quadpc kernel: [263676.682677] [<ffffffff8107692e>] ? wake_up_bit+0x2e/0x40 Aug 13 15:42:12 quadpc kernel: [263676.682679] [<ffffffff811abf00>] writeback_sb_inodes+0x1a0/0x390 Aug 13 15:42:12 quadpc kernel: [263676.682681] [<ffffffff811ac18f>] __writeback_inodes_wb+0x9f/0xd0 Aug 13 15:42:12 quadpc kernel: [263676.682683] [<ffffffff811ac403>] wb_writeback+0x243/0x2c0 Aug 13 15:42:12 quadpc kernel: [263676.682686] [<ffffffff8119c891>] ? get_nr_inodes+0x51/0x70 Aug 13 15:42:12 quadpc kernel: [263676.682688] [<ffffffff811ad88f>] wb_do_writeback+0x1ff/0x210 Aug 13 15:42:12 quadpc kernel: [263676.682690] [<ffffffff811ad92b>] bdi_writeback_thread+0x8b/0x210 Aug 13 15:42:12 quadpc kernel: [263676.682691] [<ffffffff811ad8a0>] ? wb_do_writeback+0x210/0x210 Aug 13 15:42:12 quadpc kernel: [263676.682693] [<ffffffff81076023>] kthread+0x93/0xa0 Aug 13 15:42:12 quadpc kernel: [263676.682696] [<ffffffff8168c3a4>] kernel_thread_helper+0x4/0x10 Aug 13 15:42:12 quadpc kernel: [263676.682698] [<ffffffff81075f90>] ? kthread_freezable_should_stop+0x70/0x70 Aug 13 15:42:12 quadpc kernel: [263676.682699] [<ffffffff8168c3a0>] ? gs_change+0x13/0x13 Aug 13 15:42:12 quadpc kernel: [263676.682701] ---[ end trace b1822651d1a393e4 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
