On 2023/02/15 17:24, Lianbo Jiang wrote: Thank you for the patch. Could I have "bt -c 25" output with the patch and "bt -r -c 25 | tail -n 40" output for checking? Thanks, Kazu > > Also no exception frame when coming from do_softirq_own_stack. > > Reported-by: Marco Patalano <mpatalan(a)redhat.com&gt; > Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com&gt; > --- > x86_64.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/x86_64.c b/x86_64.c > index 5b671bd97775..3428bed417df 100644 > --- a/x86_64.c > +++ b/x86_64.c > @@ -3825,10 +3825,11 @@ in_exception_stack: > up -= 1; > bt->instptr = *up; > /* > - * No exception frame when coming from call_softirq. > + * No exception frame when coming from call_softirq > + * or do_softirq_own_stack. > */ > if ((sp = value_search(bt->instptr, &offset)) && > - STREQ(sp->name, "call_softirq")) > + (STREQ(sp->name, "call_softirq") || STREQ(sp->name, "do_softirq_own_stack"))) > irq_eframe = 0; > bt->frameptr = 0; > done = FALSE;

On 2023/02/16 13:05, lijiang wrote: Thank you, looks better. Applied with Georges' suggestion and a few commit log changes. https://github.com/crash-utility/crash/commit/e0e6e4a7ee03b3d00b50a9e4db2... The irq_eframe_link calculated on RHEL8 also may be wrong, but I have a plan of changing that part and will revisit with it. Thanks, Kazu >>> >>> crash> bt -c 25 >>> PID: 0        TASK: ffff914f820a8000  CPU: 25   COMMAND: "swapper/25" >>>  #0 [fffffe0000504e48] crash_nmi_callback at ffffffffa665d763 >>>  #1 [fffffe0000504e50] nmi_handle at ffffffffa662a423 >>>  #2 [fffffe0000504ea8] default_do_nmi at ffffffffa6fe7dc9 >>>  #3 [fffffe0000504ec8] do_nmi at ffffffffa662a97f >>>  #4 [fffffe0000504ef0] end_repeat_nmi at ffffffffa70015e8 >>>     [exception RIP: clone_endio+172] >>>     RIP: ffffffffc005c1ec  RSP: ffffa1d403d08e98  RFLAGS: 00000246 >>>     RAX: 0000000000000000  RBX: ffff915326fba230  RCX: 0000000000000018 >>>     RDX: ffffffffc0075400  RSI: 0000000000000000  RDI: ffff915326fba230 >>>     RBP: ffff915326fba1c0   R8: 0000000000001000   R9: ffff915308d6d2a0 >>>     R10: 000000a97dfe5e10  R11: ffffa1d40038fe98  R12: ffff915302babc40 >>>     R13: ffff914f94360000  R14: 0000000000000000  R15: 0000000000000000 >>>     ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018 >>> --- <NMI exception stack> --- >>>  #5 [ffffa1d403d08e98] clone_endio at ffffffffc005c1ec [dm_mod] >>>  #6 [ffffa1d403d08ed0] blk_update_request at ffffffffa6a96954 >>>  #7 [ffffa1d403d08f10] scsi_end_request at ffffffffa6c9b968 >>>  #8 [ffffa1d403d08f48] scsi_io_completion at ffffffffa6c9bb3e >>>  #9 [ffffa1d403d08f90] blk_complete_reqs at ffffffffa6aa0e95 >>> #10 [ffffa1d403d08fa0] __softirqentry_text_start at ffffffffa72000dc >>> #11 [ffffa1d403d08ff0] do_softirq_own_stack at ffffffffa7000f9a >>> --- <IRQ stack> --- >>> #12 [ffffa1d40038fe70] update_ts_time_stats at ffffffffa67a1e68 >>> #13 [ffffa1d40038fea0] do_softirq at ffffffffa66fb4c5 >>> #14 [ffffa1d40038feb0] flush_smp_call_function_queue at ffffffffa67a94e0 >>> #15 [ffffa1d40038fec0] do_idle at ffffffffa672eae5 >>> #16 [ffffa1d40038ff10] cpu_startup_entry at ffffffffa672edff >>> #17 [ffffa1d40038ff30] start_secondary at ffffffffa665fa2c >>> #18 [ffffa1d40038ff50] secondary_startup_64_no_verify at ffffffffa6600116 >>> crash> >>> crash> bt -r -c 25 | tail -n 40 >>> ffffa1d40038fd80:  ffff9156ff26afc0 0000002027c3e7a1 >>> ffffa1d40038fd90:  __next_timer_interrupt+166 ffff9156ff25aa68 >>> ffffa1d40038fda0:  00000000fffd85da 0000000000000082 >>> ffffa1d40038fdb0:  0000000000000082 hrtimer_get_next_event+78 >>> ffffa1d40038fdc0:  ffff9156ff25aa40 000000200cd15980 >>> ffffa1d40038fdd0:  __hrtimer_next_event_base+192 ffff9156ff25cf40 >>> ffffa1d40038fde0:  7fffffffffffffff ffff9156ff25d580 >>> ffffa1d40038fdf0:  0000000000000082 ffffffffffffffff >>> ffffa1d40038fe00:  0000000000000082 hrtimer_next_event_without+96 >>> ffffa1d40038fe10:  ffff9156ff25d580 000000200cff2040 >>> ffffa1d40038fe20:  000000200cdb406e ffff9153052f8c00 >>> ffffa1d40038fe30:  sched_clock+5    sched_clock_cpu+12 >>> ffffa1d40038fe40:  acpi_idle_driver+136 ffff9153052f8c00 >>> ffffa1d40038fe50:  cpuidle_enter_state+181 000000203501afdb >>> ffffa1d40038fe60:  00ffffffa82c44c0 read_tsc >>> ffffa1d40038fe70:  update_ts_time_stats+88 fffffffffffffff8 >>> ffffa1d40038fe80:  0000000000000000 __flush_smp_call_function_queue+219 >>> ffffa1d40038fe90:  0000000000000286 __cpu_online_mask >>> ffffa1d40038fea0:  do_softirq+69    0000000000000286 >>> ffffa1d40038feb0:  flush_smp_call_function_queue+96 ffff914f820a8000 >>> ffffa1d40038fec0:  do_idle+405      do_idle+450 >>> ffffa1d40038fed0:  0000000000000010 8b7d6c8869010c00 >>> ffffa1d40038fee0:  0000000000000085 0000000000000000 >>> ffffa1d40038fef0:  0000000000000000 0000000000000000 >>> ffffa1d40038ff00:  0000000000000000 0000000000000000 >>> ffffa1d40038ff10:  cpu_startup_entry+111 8b7d6c8869010c00 >>> ffffa1d40038ff20:  534e004fc6e00600 ffffa1d40038ff38 >>> ffffa1d40038ff30:  start_secondary+396 534e004fc6e00600 >>> ffffa1d40038ff40:  0000000000000000 0000000040000000 >>> ffffa1d40038ff50:  secondary_startup_64_no_verify+209 0000000000000000 >>> ffffa1d40038ff60:  0000000000000000 0000000000000000 >>> ffffa1d40038ff70:  0000000000000000 0000000000000000 >>> ffffa1d40038ff80:  0000000000000000 0000000000000000 >>> ffffa1d40038ff90:  0000000000000000 0000000000000000 >>> ffffa1d40038ffa0:  0000000000000000 0000000000000000 >>> ffffa1d40038ffb0:  0000000000000000 0000000000000000 >>> ffffa1d40038ffc0:  0000000000000000 0000000000000000 >>> ffffa1d40038ffd0:  0000000000000000 0000000000000000 >>> ffffa1d40038ffe0:  0000000000000000 0000000000000000 >>> ffffa1d40038fff0:  0000000000000000 0000000000000000 >>> crash> >>> Thanks. >>> Lianbo >>> >>> Thanks, >>> Kazu >>> >>> > >>> > Also no exception frame when coming from do_softirq_own_stack. >>> > >>> > Reported-by: Marco Patalano <mpatalan(a)redhat.com <mailto:mpatalan@redhat.com>> >>> > Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com <mailto:lijiang@redhat.com>> >>> > --- >>> >   x86_64.c | 5 +++-- >>> >   1 file changed, 3 insertions(+), 2 deletions(-) >>> > >>> > diff --git a/x86_64.c b/x86_64.c >>> > index 5b671bd97775..3428bed417df 100644 >>> > --- a/x86_64.c >>> > +++ b/x86_64.c >>> > @@ -3825,10 +3825,11 @@ in_exception_stack: >>> >               up -= 1; >>> >                   bt->instptr = *up; >>> >               /* >>> > -              *  No exception frame when coming from call_softirq. >>> > +              *  No exception frame when coming from call_softirq >>> > +              *  or do_softirq_own_stack. >>> >                */ >>> >               if ((sp = value_search(bt->instptr, &offset)) && >>> > -                 STREQ(sp->name, "call_softirq")) >>> > +                 (STREQ(sp->name, "call_softirq") || STREQ(sp->name, "do_softirq_own_stack"))) >>> >                       irq_eframe = 0; >>> >                   bt->frameptr = 0; >>> >                   done = FALSE; >>>