bt -a

crash> bt -a
PID: 0      TASK: ffffffff93415740  CPU: 0   COMMAND: "swapper/0"
 #0 [fffffe0000007e58] crash_nmi_callback at ffffffff91c9e58c
 #1 [fffffe0000007e60] nmi_handle at ffffffff91c7f72e
 #2 [fffffe0000007eb8] default_do_nmi at ffffffff91c7fa79
 #3 [fffffe0000007ed8] do_nmi at ffffffff91c7fbf7
 #4 [fffffe0000007ef0] end_repeat_nmi at ffffffff92a01238
    [exception RIP: acpi_processor_ffh_cstate_enter+96]
    RIP: ffffffff92834930  RSP: ffffffff93403e28  RFLAGS: 00000046
    RAX: 0000000000000051  RBX: ffffa362ba838c00  RCX: 0000000000000001
    RDX: 0000000000000000  RSI: 0000000000000051  RDI: 0000000000000001
    RBP: ffffa362ba838c98   R8: 0000000000000000   R9: 0000000000020480
    R10: 000007748088d7ea  R11: ffffa362bba1fce4  R12: 0000000000000002
    R13: 0000000000000002  R14: 0000000000000002  R15: ffffffff934c04e0
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
--- <NMI exception stack> ---
 #5 [ffffffff93403e28] acpi_processor_ffh_cstate_enter at ffffffff92834930
 #6 [ffffffff93403e28] acpi_idle_enter at ffffffff9218e77c
 #7 [ffffffff93403e70] cpuidle_enter_state at ffffffff924f486e
 #8 [ffffffff93403ec0] do_idle at ffffffff91cf1c30
 #9 [ffffffff93403f00] cpu_startup_entry at ffffffff91cf1dd4
#10 [ffffffff93403f10] start_kernel at ffffffff93a73f11
#11 [ffffffff93403f50] secondary_startup_64 at ffffffff91c000d4

PID: 0      TASK: ffffa362baf61880  CPU: 1   COMMAND: "swapper/1"
 #0 [fffffe0000032e58] crash_nmi_callback at ffffffff91c9e58c
 #1 [fffffe0000032e60] nmi_handle at ffffffff91c7f72e
 #2 [fffffe0000032eb8] default_do_nmi at ffffffff91c7fa79
 #3 [fffffe0000032ed8] do_nmi at ffffffff91c7fbf7
 #4 [fffffe0000032ef0] end_repeat_nmi at ffffffff92a01238
    [exception RIP: acpi_processor_ffh_cstate_enter+96]
    RIP: ffffffff92834930  RSP: ffffbd9f406c3e48  RFLAGS: 00000046
    RAX: 0000000000000051  RBX: ffffa362ba839000  RCX: 0000000000000001
    RBP: ffffa362ba839098   R8: 0000000000000000   R9: 0000000000020480
    R10: 000007748076cd5c  R11: ffffa362bba9fce4  R12: 0000000000000002
    R13: 0000000000000002  R14: 0000000000000002  R15: ffffffff934c04e0
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
--- <NMI exception stack> ---
 #5 [ffffbd9f406c3e48] acpi_processor_ffh_cstate_enter at ffffffff92834930
 #6 [ffffbd9f406c3e48] acpi_idle_enter at ffffffff9218e77c
 #7 [ffffbd9f406c3e90] cpuidle_enter_state at ffffffff924f486e
 #8 [ffffbd9f406c3ee0] do_idle at ffffffff91cf1c30
 #9 [ffffbd9f406c3f20] cpu_startup_entry at ffffffff91cf1dd4
#10 [ffffbd9f406c3f30] start_secondary at ffffffff91c9fca2
#11 [ffffbd9f406c3f50] secondary_startup_64 at ffffffff91c000d4

PID: 3527   TASK: ffffa3620a429880  CPU: 2   COMMAND: "xfce4-terminal"
 #0 [ffffbd9f40cabeb8] crash_nmi_callback at ffffffff91c9e58c
 #1 [ffffbd9f40cabec0] nmi_handle at ffffffff91c7f72e
 #2 [ffffbd9f40cabf18] default_do_nmi at ffffffff91c7fa79
 #3 [ffffbd9f40cabf38] do_nmi at ffffffff91c7fbf7
 #4 [ffffbd9f40cabf50] nmi at ffffffff92a0117b
    RIP: 00007f07b7571ae0  RSP: 00007ffca2dec598  RFLAGS: 00000246
    RAX: 000055cbe6af4e88  RBX: 000055cbe6cbb070  RCX: 000000000190a218
    RDX: 000000008af21ea0  RSI: 000055cbe6a7d8c0  RDI: 00007ffca2dec630
    RBP: 000055cbe6a7d8c0   R8: 000055cbe6af4de0   R9: 0000000000000208
    R10: 0000000000000100  R11: 0000000000000026  R12: 00007ffca2dec880
    R13: 00007f07b760ce00  R14: 00000000a749af95  R15: 0000000000000000
    ORIG_RAX: ffffffffffffffff  CS: 0033  SS: 002b

PID: 447    TASK: ffffa362baa60c40  CPU: 3   COMMAND: "khungtaskd"
 #0 [ffffbd9f41173d28] machine_kexec at ffffffff91ca7c5e
 #1 [ffffbd9f41173d70] __crash_kexec at ffffffff91d4f408
 #2 [ffffbd9f41173e38] panic at ffffffff91cc333f
 #3 [ffffbd9f41173eb8] watchdog at ffffffff91d71014
 #4 [ffffbd9f41173f10] kthread at ffffffff91ce3b8d
 #5 [ffffbd9f41173f50] ret_from_fork at ffffffff92a00205