***************** crashinfo --stacksummary ***************** /exports/testreports/61243/testresults/sanity2-ldiskfs-DNE-rocky8.10_x86_64-rocky8.10_x86_64-retry3/oleg330-server-timeout-core (4.18.0rh8.10-debug) ------- 98 stacks like that: ---------- #0 __schedule #1 schedule #2 ptlrpc_wait_event #3 ptlrpc_main #4 kthread #5 ret_from_fork youngest=0s(pid=58704), oldest=10387s(pid=6487) ........................ ldlm_cb00_000 1 times ldlm_cb00_001 1 times ldlm_cb00_002 1 times ldlm_cb00_003 1 times ldlm_cn00_000 1 times ldlm_cn00_001 1 times ldlm_cn00_002 1 times ldlm_cn00_003 1 times ldlm_cn00_004 1 times ldlm_cn00_005 1 times ldlm_cn00_006 1 times ll_mgs_0000 1 times ll_mgs_0001 1 times ll_mgs_0002 1 times ll_ost00_000 1 times ll_ost00_001 1 times ll_ost00_002 1 times ll_ost00_003 1 times ll_ost00_005 1 times ll_ost00_006 1 times ll_ost00_007 1 times ll_ost00_008 1 times ll_ost00_009 1 times ll_ost00_010 1 times ll_ost00_011 1 times ll_ost00_012 1 times ll_ost00_013 1 times ll_ost00_015 1 times ll_ost00_017 1 times ll_ost00_018 1 times ll_ost00_019 1 times ll_ost00_020 1 times ll_ost00_021 1 times ll_ost00_023 1 times ll_ost00_024 1 times ll_ost00_026 1 times ll_ost00_028 1 times ll_ost00_029 1 times ll_ost00_030 1 times ll_ost00_031 1 times ll_ost00_032 1 times ll_ost_create00 3 times ll_ost_io00_000 1 times ll_ost_io00_001 1 times ll_ost_io00_002 1 times ll_ost_io00_003 1 times ll_ost_io00_004 1 times ll_ost_io00_005 1 times ll_ost_io00_006 1 times ll_ost_io00_007 1 times ll_ost_io00_008 1 times ll_ost_io00_009 1 times ll_ost_io00_010 1 times ll_ost_io00_011 1 times ll_ost_io00_012 1 times ll_ost_io00_013 1 times ll_ost_io00_014 1 times ll_ost_io00_015 1 times ll_ost_io00_016 1 times ll_ost_out00_00 6 times ll_ost_seq00_00 2 times mdt00_000 1 times mdt00_001 1 times mdt00_002 1 times mdt00_003 1 times mdt00_004 1 times mdt00_005 1 times mdt00_006 1 times mdt00_007 1 times mdt00_008 1 times mdt00_009 1 times mdt_fld_0000 1 times mdt_fld_0001 1 times mdt_io00_000 1 times mdt_io00_001 1 times mdt_io00_002 1 times mdt_io00_003 1 times mdt_io00_004 1 times mdt_out00_000 1 times mdt_out00_001 1 times mdt_out00_002 1 times mdt_out00_003 1 times mdt_rdpg00_000 1 times mdt_rdpg00_001 1 times mdt_rdpg00_002 1 times mdt_rdpg00_003 1 times mdt_seqm_0000 1 times mdt_seqm_0001 1 times mdt_seqs_0000 1 times mdt_seqs_0001 1 times ------- 35 stacks like that: ---------- #0 __schedule #1 schedule #2 rescuer_thread #3 kthread #4 ret_from_fork youngest=9540s(pid=27019), oldest=10610s(pid=3) ........................ acpi_thermal_pm 1 times ata_sff 1 times blkcg_punt_bio 1 times crypto 1 times edac-poller 1 times ext4-rsv-conver 1 times ipv6_addrconf 1 times kblockd 1 times kdmflush/252:0 1 times kdmflush/252:1 1 times kdmflush/252:2 1 times kdmflush/252:3 1 times kintegrityd 1 times knbd0-recv 1 times kstrp 1 times kthrotld 1 times ldiskfs-misc 4 times md 1 times md_bitmap 1 times mm_percpu_wq 1 times netns 1 times nfsiod 1 times rcu_gp 1 times rcu_par_gp 1 times rpciod 1 times scsi_tmf_0 1 times scsi_tmf_1 1 times slub_flushwq 1 times tpm_dev_wq 1 times writeback 1 times xprtiod 1 times zswap-shrink 1 times ------- 23 stacks like that: ---------- #0 __schedule #1 schedule #2 worker_thread #3 kthread #4 ret_from_fork youngest=0s(pid=763), oldest=10600s(pid=656) ........................ kworker/0:0 1 times kworker/0:0H 1 times kworker/0:1H 1 times kworker/0:2 1 times kworker/1:0 1 times kworker/1:0H 1 times kworker/1:1 1 times kworker/1:2H 1 times kworker/1:3 1 times kworker/2:0 1 times kworker/2:0H 1 times kworker/2:1 1 times kworker/2:2H 1 times kworker/3:0 1 times kworker/3:1 1 times kworker/3:1H 1 times kworker/3:2 1 times kworker/3:2H 1 times kworker/u8:0 1 times kworker/u8:1 1 times kworker/u8:2 1 times kworker/u8:3 1 times kworker/u9:1 1 times ------- 16 stacks like that: ---------- #0 __schedule #1 schedule #2 smpboot_thread_fn #3 kthread #4 ret_from_fork youngest=0s(pid=20), oldest=10597s(pid=17) ........................ cpuhp/0 1 times cpuhp/1 1 times cpuhp/2 1 times cpuhp/3 1 times ksoftirqd/0 1 times ksoftirqd/1 1 times ksoftirqd/2 1 times ksoftirqd/3 1 times migration/0 1 times migration/1 1 times migration/2 1 times migration/3 1 times watchdog/0 1 times watchdog/1 1 times watchdog/2 1 times watchdog/3 1 times ------- 13 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_hrtimeout_range_clock #3 schedule_hrtimeout_range #4 poll_schedule_timeout.constprop.11 #5 do_sys_poll #6 __x64_sys_poll #7 do_syscall_64 #8 entry_SYSCALL_64_after_hwframe youngest=0s(pid=1013), oldest=10594s(pid=1017) ........................ NetworkManager 1 times gdbus 2 times gmain 3 times irqbalance 1 times polkitd 2 times rngd 1 times rpcbind 1 times tuned 2 times ------- 10 stacks like that: ---------- #0 __schedule #1 schedule #2 futex_wait_queue_me #3 futex_wait #4 do_futex #5 __x64_sys_futex #6 do_syscall_64 #7 entry_SYSCALL_64_after_hwframe youngest=2264s(pid=1100), oldest=10594s(pid=1044) ........................ JS Helper 4 times gssproxy 5 times rs:main Q:Reg 1 times ------- 8 stacks like that: ---------- #0 __schedule #1 schedule #2 taskq_thread #3 kthread #4 ret_from_fork youngest=10526s(pid=4305), oldest=10530s(pid=4302) ........................ arc_prune 1 times dbu_evict 1 times spl_delay_taskq 1 times spl_dynamic_tas 1 times spl_kmem_cache 1 times spl_system_task 1 times z_vdev_file 1 times zvol_tq-0 1 times ------- 7 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_hrtimeout_range_clock #3 schedule_hrtimeout_range #4 poll_schedule_timeout.constprop.11 #5 do_select #6 core_sys_select #7 kern_select #8 __x64_sys_select #9 do_syscall_64 #10 entry_SYSCALL_64_after_hwframe youngest=0s(pid=1031), oldest=10592s(pid=1057) ........................ agetty 3 times dhclient 1 times sshd 1 times tuned 2 times ------- 6 stacks like that: ---------- #0 __schedule #1 schedule #2 wait_transaction_locked #3 add_transaction_credits #4 start_this_handle #5 jbd2__journal_start #6 __ldiskfs_journal_start_sb #7 osd_trans_start #8 ofd_trans_start #9 ofd_destroy #10 ofd_destroy_by_fid #11 ofd_destroy_hdl #12 tgt_handle_request0 #13 tgt_request_handle #14 ptlrpc_server_handle_request #15 ptlrpc_main #16 kthread #17 ret_from_fork youngest=0s(pid=75122), oldest=0s(pid=14511) ........................ ll_ost00_004 1 times ll_ost00_014 1 times ll_ost00_016 1 times ll_ost00_022 1 times ll_ost00_025 1 times ll_ost00_027 1 times ------- 6 stacks like that: ---------- #0 __schedule #1 schedule #2 osp_precreate_thread #3 kthread #4 ret_from_fork youngest=1s(pid=8427), oldest=4s(pid=9733) ........................ osp-pre-0-0 1 times osp-pre-0-1 2 times osp-pre-1-0 2 times osp-pre-1-1 1 times ------- 6 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 qsd_upd_thread #4 kthread #5 ret_from_fork youngest=9s(pid=9457), oldest=54s(pid=7428) ........................ lquota_wb_lustr 6 times ------- 6 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_hrtimeout_range_clock #3 schedule_hrtimeout_range #4 ep_poll #5 do_epoll_wait #6 __x64_sys_epoll_wait #7 do_syscall_64 #8 entry_SYSCALL_64_after_hwframe youngest=14s(pid=1), oldest=10594s(pid=1040) ........................ dbus-daemon 1 times gssproxy 1 times systemd 1 times systemd-journal 1 times systemd-logind 1 times systemd-udevd 1 times ------- 5 stacks like that: ---------- #0 __schedule #1 schedule #2 ldlm_bl_thread_main #3 kthread #4 ret_from_fork youngest=0s(pid=6469), oldest=0s(pid=14528) ........................ ldlm_bl_01 1 times ldlm_bl_02 1 times ldlm_bl_03 1 times ldlm_bl_04 1 times ldlm_bl_05 1 times ------- 4 stacks like that: ---------- #0 __schedule #1 schedule #2 osp_sync_process_queues #3 llog_process_thread #4 llog_process_or_fork #5 llog_cat_process_cb #6 llog_process_thread #7 llog_process_or_fork #8 llog_cat_process_or_fork #9 llog_cat_process #10 osp_sync_thread #11 kthread #12 ret_from_fork youngest=0s(pid=8418), oldest=1034s(pid=9740) ........................ osp-syn-0-0 1 times osp-syn-0-1 1 times osp-syn-1-0 1 times osp-syn-1-1 1 times ------- 4 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 ksocknal_connd #4 kthread #5 ret_from_fork youngest=10381s(pid=3610), oldest=10460s(pid=3611) ........................ socknal_cd00 1 times socknal_cd01 1 times socknal_cd02 1 times socknal_cd03 1 times ------- 3 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 wait_woken #4 ptlrpcd #5 kthread #6 ret_from_fork youngest=0s(pid=3623), oldest=9209s(pid=3621) ........................ ptlrpcd_00_01 1 times ptlrpcd_00_02 1 times ptlrpcd_rcv 1 times ------- 3 stacks like that: ---------- #0 __schedule #1 schedule #2 ksocknal_scheduler #3 kthread #4 ret_from_fork youngest=1s(pid=3615), oldest=1s(pid=3617) ........................ socknal_sd00_00 1 times socknal_sd00_01 1 times socknal_sd00_02 1 times ------- 3 stacks like that: ---------- #0 __schedule #1 schedule #2 kjournald2 #3 kthread #4 ret_from_fork youngest=0s(pid=7407), oldest=10600s(pid=666) ........................ jbd2/dm-0-8 1 times jbd2/dm-1-8 1 times jbd2/nbd0-8 1 times ------- 3 stacks like that: ---------- #0 __schedule #1 schedule_idle #2 do_idle #3 cpu_startup_entry #4 start_secondary #5 secondary_startup_64_no_verify youngest=10610s(pid=0), oldest=10610s(pid=0) ........................ swapper/1 1 times swapper/2 1 times swapper/3 1 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 ofd_id_repair_thread_main #3 kthread #4 ret_from_fork youngest=9540s(pid=27024), oldest=10395s(pid=9451) ........................ ofd_id_repair 2 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 ofd_inconsistency_verification_main #3 kthread #4 ret_from_fork youngest=9540s(pid=27023), oldest=10395s(pid=9450) ........................ inconsistency_v 2 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 osp_send_update_thread #3 kthread #4 ret_from_fork youngest=2277s(pid=7421), oldest=4004s(pid=7765) ........................ osp_up0-1 1 times osp_up1-0 1 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 distribute_txn_commit_thread #3 kthread #4 ret_from_fork youngest=2277s(pid=7429), oldest=4004s(pid=6512) ........................ dist_txn-0 1 times dist_txn-1 1 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 mdt_restriper_main #3 kthread #4 ret_from_fork youngest=10440s(pid=7419), oldest=10459s(pid=6505) ........................ mdt_restriper_0 2 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 mgs_ir_notify #3 kthread #4 ret_from_fork youngest=9539s(pid=6496), oldest=10460s(pid=6471) ........................ mgs_lustre_noti 1 times mgs_params_noti 1 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_hrtimeout_range_clock #3 schedule_hrtimeout_range #4 cv_timedwait_hires_common #5 cv_timedwait_idle_hires #6 zthr_procedure #7 thread_generic_wrapper #8 kthread #9 ret_from_fork youngest=0s(pid=4309), oldest=0s(pid=4310) ........................ arc_evict 1 times arc_reap 1 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 scsi_error_handler #3 kthread #4 ret_from_fork youngest=10605s(pid=452), oldest=10605s(pid=454) ........................ scsi_eh_0 1 times scsi_eh_1 1 times ------- 2 stacks like that: ---------- #0 __schedule #1 schedule #2 rcu_tasks_kthread #3 kthread #4 ret_from_fork youngest=10610s(pid=11), oldest=10610s(pid=10) ........................ rcu_tasks_rude_ 1 times rcu_tasks_trace 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 io_schedule #3 bit_wait_io #4 __wait_on_bit #5 out_of_line_wait_on_bit #6 do_get_write_access #7 jbd2_journal_get_write_access #8 __ldiskfs_journal_get_write_access #9 osd_ldiskfs_write #10 osd_write #11 dt_record_write #12 tgt_client_data_write #13 tgt_last_rcvd_update #14 tgt_txn_stop_cb #15 dt_txn_hook_stop #16 osd_trans_stop #17 ofd_trans_stop #18 ofd_destroy #19 ofd_destroy_by_fid #20 ofd_destroy_hdl #21 tgt_handle_request0 #22 tgt_request_handle #23 ptlrpc_server_handle_request #24 ptlrpc_main #25 kthread #26 ret_from_fork youngest=0s(pid=76291), oldest=0s(pid=76291) ........................ ll_ost00_033 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 io_schedule #3 bit_wait_io #4 __wait_on_bit #5 out_of_line_wait_on_bit #6 __wait_on_buffer #7 jbd2_journal_commit_transaction #8 kjournald2 #9 kthread #10 ret_from_fork youngest=0s(pid=27018), oldest=0s(pid=27018) ........................ jbd2/dm-2-8 1 times ------- 1 stacks like that: ---------- #-1 copy_user_generic_unrolled #0 probe_kernel_read #1 kmem_cache_alloc #2 mempool_alloc_slab #3 mempool_alloc #4 bio_alloc_bioset #5 submit_bh_wbc #6 submit_bh #7 jbd2_journal_commit_transaction #8 kjournald2 #9 kthread #10 ret_from_fork youngest=0s(pid=9436), oldest=0s(pid=9436) ........................ jbd2/dm-3-8 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 qmt_reba_thread #3 kthread #4 ret_from_fork youngest=10460s(pid=6503), oldest=10460s(pid=6503) ........................ qmt_reba_lustre 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 mgc_requeue_thread #3 kthread #4 ret_from_fork youngest=8234s(pid=6478), oldest=8234s(pid=6478) ........................ ll_cfg_requeue 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 ping_evictor_main #3 kthread #4 ret_from_fork youngest=0s(pid=6476), oldest=0s(pid=6476) ........................ ll_evictor 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 expired_lock_main #3 kthread #4 ret_from_fork youngest=10461s(pid=6470), oldest=10461s(pid=6470) ........................ ldlm_elt 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 __cv_timedwait_common #4 __cv_timedwait_idle #5 l2arc_feed_thread #6 thread_generic_wrapper #7 kthread #8 ret_from_fork youngest=0s(pid=4315), oldest=0s(pid=4315) ........................ l2arc_feed 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_hrtimeout_range_clock #3 schedule_hrtimeout_range #4 cv_timedwait_hires_common #5 cv_timedwait_idle_hires #6 dbuf_evict_thread #7 thread_generic_wrapper #8 kthread #9 ret_from_fork youngest=0s(pid=4312), oldest=0s(pid=4312) ........................ dbuf_evict 1 times ------- 1 stacks like that: ---------- #-1 strstr #0 libcfs_debug_msg #1 ptlrpc_check_set #2 ptlrpcd #3 kthread #4 ret_from_fork youngest=0s(pid=3625), oldest=0s(pid=3625) ........................ ptlrpcd_00_03 1 times ------- 1 stacks like that: ---------- #-1 vsnprintf #0 snprintf #1 libcfs_nidstr_r #2 libcfs_idstr #3 lnet_try_match_md #4 lnet_mt_match_md #5 lnet_ptl_match_md #6 lnet_parse_local #7 lnet_parse #8 lolnd_send #9 lnet_ni_send #10 lnet_send #11 LNetPut #12 ptl_send_buf #13 ptl_send_rpc #14 ptlrpc_send_new_req #15 ptlrpc_check_set #16 ptlrpcd #17 kthread #18 ret_from_fork youngest=0s(pid=3622), oldest=0s(pid=3622) ........................ ptlrpcd_00_00 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 lnet_peer_discovery #4 kthread #5 ret_from_fork youngest=0s(pid=3620), oldest=0s(pid=3620) ........................ lnet_discovery 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 wait_for_completion_interruptible_timeout #4 lnet_monitor_thread #5 kthread #6 ret_from_fork youngest=0s(pid=3619), oldest=0s(pid=3619) ........................ monitor_thread 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 lnet_acceptor #3 kthread #4 ret_from_fork youngest=10381s(pid=3618), oldest=10381s(pid=3618) ........................ acceptor_001 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 ksocknal_reaper #4 kthread #5 ret_from_fork youngest=0s(pid=3614), oldest=0s(pid=3614) ........................ socknal_reaper 1 times ------- 1 stacks like that: ---------- #-1 format_decode #0 vsnprintf #1 libcfs_debug_msg #2 _ldlm_lock_debug #3 ldlm_lock_decref_internal #4 ldlm_lock_decref #5 ptlrpc_hr_main #6 kthread #7 ret_from_fork youngest=0s(pid=3609), oldest=0s(pid=3609) ........................ ptlrpc_hr00_001 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 ptlrpc_hr_main #3 kthread #4 ret_from_fork youngest=5s(pid=3608), oldest=5s(pid=3608) ........................ ptlrpc_hr00_000 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_hrtimeout_range_clock #3 schedule_hrtimeout_range #4 poll_schedule_timeout.constprop.11 #5 do_sys_poll #6 __x64_sys_ppoll #7 do_syscall_64 #8 entry_SYSCALL_64_after_hwframe youngest=0s(pid=1098), oldest=0s(pid=1098) ........................ in:imjournal 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_hrtimeout_range_clock #3 schedule_hrtimeout_range #4 poll_schedule_timeout.constprop.11 #5 do_select #6 core_sys_select #7 __x64_sys_pselect6 #8 do_syscall_64 #9 entry_SYSCALL_64_after_hwframe youngest=429s(pid=1077), oldest=429s(pid=1077) ........................ rsyslogd 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 do_nanosleep #3 hrtimer_nanosleep #4 __x64_sys_nanosleep #5 do_syscall_64 #6 entry_SYSCALL_64_after_hwframe youngest=1s(pid=1054), oldest=1s(pid=1054) ........................ crond 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 nfs41_callback_svc #3 kthread #4 ret_from_fork youngest=10595s(pid=977), oldest=10595s(pid=977) ........................ NFSv4 callback 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 wait_woken #4 sk_wait_data #5 tcp_recvmsg #6 inet_recvmsg #7 sock_recvmsg #8 sock_xmit #9 nbd_read_stat #10 recv_work #11 process_one_work #12 worker_thread #13 kthread #14 ret_from_fork youngest=6746s(pid=652), oldest=6746s(pid=652) ........................ kworker/u9:0 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 kswapd #3 kthread #4 ret_from_fork youngest=10608s(pid=71), oldest=10608s(pid=71) ........................ kswapd0 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 kthread_worker_fn #3 kthread #4 ret_from_fork youngest=10610s(pid=57), oldest=10610s(pid=57) ........................ watchdogd 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 khugepaged #4 kthread #5 ret_from_fork youngest=6s(pid=48), oldest=6s(pid=48) ........................ khugepaged 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 ksm_scan_thread #3 kthread #4 ret_from_fork youngest=10610s(pid=47), oldest=10610s(pid=47) ........................ ksmd 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 kcompactd #3 kthread #4 ret_from_fork youngest=10610s(pid=46), oldest=10610s(pid=46) ........................ kcompactd0 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 oom_reaper #3 kthread #4 ret_from_fork youngest=10610s(pid=44), oldest=10610s(pid=44) ........................ oom_reaper 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 schedule_timeout_interruptible #4 watchdog #5 kthread #6 ret_from_fork youngest=42s(pid=43), oldest=42s(pid=43) ........................ khungtaskd 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 devtmpfsd #3 kthread #4 ret_from_fork youngest=10400s(pid=39), oldest=10400s(pid=39) ........................ kdevtmpfs 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 schedule_timeout #3 rcu_gp_kthread #4 kthread #5 ret_from_fork youngest=0s(pid=13), oldest=0s(pid=13) ........................ rcu_sched 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule #2 kthreadd #3 ret_from_fork youngest=3s(pid=2), oldest=3s(pid=2) ........................ kthreadd 1 times ------- 1 stacks like that: ---------- #0 __schedule #1 schedule_idle #2 do_idle #3 cpu_startup_entry #4 rest_init #5 start_kernel #6 x86_64_start_reservations #7 x86_64_start_kernel #8 secondary_startup_64_no_verify youngest=10610s(pid=0), oldest=10610s(pid=0) ........................ swapper/0 1 times ** Execution took 2.31s (real) 0.60s (CPU), Child processes: 1.73s