lkml.org 
[lkml]   [2007]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    Subject2.6.23.8, ondemand scaling governor: "BUG: soft lockup detected on CPU#0!"
    Hi folks,

    using the ondemand scaling governour I see some error messages
    in kern.log, e.g.:

    Nov 20 01:00:46 bugs kernel: BUG: soft lockup detected on CPU#0!
    Nov 20 01:00:46 bugs kernel: [<c013cf8d>] softlockup_tick+0x91/0xa6
    Nov 20 01:00:46 bugs kernel: [<c012269c>] update_process_times+0x3a/0x5d
    Nov 20 01:00:46 bugs kernel: [<c0131219>] tick_sched_timer+0x115/0x164
    Nov 20 01:00:46 bugs kernel: [<c012d311>] hrtimer_interrupt+0x102/0x191
    Nov 20 01:00:46 bugs kernel: [<c0106cd6>] timer_interrupt+0x2e/0x34
    Nov 20 01:00:46 bugs kernel: [<c013d1f6>] handle_IRQ_event+0x1a/0x3f
    Nov 20 01:00:46 bugs kernel: [<c013e4e1>] handle_level_irq+0xa8/0xb7
    Nov 20 01:00:46 bugs kernel: [<c0106367>] do_IRQ+0x53/0x6c
    Nov 20 01:00:46 bugs kernel: [<c0104853>] common_interrupt+0x23/0x28
    Nov 20 01:00:46 bugs kernel: [<c011007b>] smp_apic_timer_interrupt+0x1a/0x70
    Nov 20 01:00:46 bugs kernel: [<c0102a36>] default_idle+0x27/0x39
    Nov 20 01:00:46 bugs kernel: [<c010234c>] cpu_idle+0x46/0x68
    Nov 20 01:00:46 bugs kernel: [<c032e9e8>] start_kernel+0x24d/0x252
    Nov 20 01:00:46 bugs kernel: [<c032e317>] unknown_bootoption+0x0/0x196
    Nov 20 01:00:46 bugs kernel: =======================

    This seems to happen when the load drops below the threshold and
    the ondemand governor changes the CPU from 2GHz to 400MHz. If I use
    the "performance" governor instead, then there is no such message.
    If I set it back to "ondemand", then the message is printed
    immediately.

    # uname -a
    Linux bugs 2.6.23.8 #1 PREEMPT Sun Nov 18 09:14:13 CET 2007 i686 GNU/Linux
    # cat /proc/cpuinfo
    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 13
    model name : Intel(R) Pentium(R) M processor 2.00GHz
    stepping : 8
    cpu MHz : 400.000
    cache size : 2048 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx bts est tm2
    bogomips : 798.34
    clflush size : 64


    Please mail if I can help to track this down.


    Regards

    Harri
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-11-20 01:21    [W:0.027 / U:59.372 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site