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    SubjectRe: kernel 3.0: BUG: soft lockup: find_get_pages+0x51/0x110


    On Sun, 21 Aug 2011, Maciej Rutecki wrote:

    > On poniedzia?ek, 15 sierpnia 2011 o 18:43:22 Justin Piszcz wrote:
    >> Hello,
    >>
    >> What causes this(?) -- am I out of memory(?) or is this a kernel bug?
    >>
    >> [104147.717815] BUG: soft lockup - CPU#13 stuck for 23s! [kswapd0:934]
    >> [104147.717820] Modules linked in: dm_mod tcp_diag parport_pc ppdev lp
    >> parport inet_diag ub pl2303 ftdi_sio snd_usb_audio snd_pcm_oss
    >> snd_mixer_oss snd_pcm snd_page_alloc snd_hwdep snd_usbmidi_lib
    >> snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event
    >> snd_seq snd_timer snd_seq_device snd soundcore usbserial cdc_acm nouveau
    >> serio_raw ttm drm_kms_helper drm agpgart i2c_algo_bit mxm_wmi wmi
    >> i7core_edac edac_core video [104147.717872] CPU 13
    >> [104147.717874] Modules linked in: dm_mod tcp_diag parport_pc ppdev lp
    >> parport inet_diag ub pl2303 ftdi_sio snd_usb_audio snd_pcm_oss
    >> snd_mixer_oss snd_pcm snd_page_alloc snd_hwdep snd_usbmidi_lib
    >> snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event
    >> snd_seq snd_timer snd_seq_device snd soundcore usbserial cdc_acm nouveau
    >> serio_raw ttm drm_kms_helper drm agpgart i2c_algo_bit mxm_wmi wmi
    >> i7core_edac edac_core video [104147.717916]
    >> [104147.717921] Pid: 934, comm: kswapd0 Not tainted 3.0.0 #4 Supermicro
    >> X8DTH-i/6/iF/6F/X8DTH [104147.717928] RIP: 0010:[<ffffffff81081f71>]
    >> [<ffffffff81081f71>] find_get_pages+0x51/0x110 [104147.717940] RSP:
    >> 0018:ffff880626127ba0 EFLAGS: 00000246
    > [...]
    >
    > It's regression? 2.6.39 works OK?

    Hello,

    It appears to have been occurring for sometime (although not since I have
    enabled frame pointers in the kernel to debug the problem):

    Kernels: 2.6.39.2, 3.0, 3.0.1.

    kern.log:Jul 30 02:10:40 p34 kernel: [27760.840979] BUG: soft lockup - CPU#10 stuck for 23s! [kswapd1:946]
    kern.log:Jul 30 02:11:08 p34 kernel: [27788.799309] BUG: soft lockup - CPU#10 stuck for 22s! [kswapd1:946]
    kern.log:Jul 30 02:15:35 p34 kernel: [28000.480936] BUG: soft lockup - CPU#10 stuck for 21s! [kswapd1:946]
    kern.log:Jul 30 02:15:35 p34 kernel: [28028.438740] BUG: soft lockup - CPU#10 stuck for 22s! [kswapd1:946]
    kern.log:Jul 30 02:15:52 p34 kernel: [28072.364088] BUG: soft lockup - CPU#10 stuck for 21s! [kswapd1:946]
    kern.log:Jul 30 02:16:20 p34 kernel: [28100.310535] BUG: soft lockup - CPU#10 stuck for 22s! [kswapd1:946]
    kern.log:Jul 30 02:16:48 p34 kernel: [28128.260612] BUG: soft lockup - CPU#10 stuck for 22s! [kswapd1:946]
    kern.log:Aug 12 01:46:47 p34 kernel: [330481.760506] BUG: soft lockup - CPU#7 stuck for 23s! [kswapd1:935]
    kern.log:Aug 12 01:47:15 p34 kernel: [330509.718618] BUG: soft lockup - CPU#7 stuck for 23s! [kswapd1:935]
    kern.log:Aug 15 11:57:38 p34 kernel: [104147.717815] BUG: soft lockup - CPU#13 stuck for 23s! [kswapd0:934]
    kern.log:Aug 18 06:15:28 p34 kernel: [50020.901890] BUG: soft lockup - CPU#4 stuck for 22s! [kswapd0:934]

    Justin.



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