From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Luis Claudio R. Goncalves" Subject: Lockdep splat + hardlock on 4.1.10-rt9 Date: Fri, 16 Oct 2015 19:52:32 -0300 Message-ID: <20151016225231.GL4265@uudg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: Linux RT Users Return-path: Received: from mail-qg0-f50.google.com ([209.85.192.50]:33638 "EHLO mail-qg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751492AbbJPWwh (ORCPT ); Fri, 16 Oct 2015 18:52:37 -0400 Received: by qgeo38 with SMTP id o38so69144182qge.0 for ; Fri, 16 Oct 2015 15:52:36 -0700 (PDT) Received: from lclaudio.dyndns.org (179.176.247.35.dynamic.adsl.gvt.net.br. [179.176.247.35]) by smtp.gmail.com with ESMTPSA id 84sm8784344qkz.8.2015.10.16.15.52.35 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Oct 2015 15:52:35 -0700 (PDT) Content-Disposition: inline Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hello, Has anybody seen the lockdep splat listed below? I was rebooting a box to run the last test before starting the weekend when I saw this one: [ 688.417543] ============================================= [ 688.417544] [ INFO: possible recursive locking detected ] [ 688.417546] 4.1.10-rt9+ #4 Not tainted [ 688.417546] --------------------------------------------- [ 688.417548] ksoftirqd/0/3 is trying to acquire lock: [ 688.417556] (((&req->rsk_timer))){+.+...}, at: [] del_timer_sync+0x5/0x190 [ 688.417557] but task is already holding lock: [ 688.417560] (((&req->rsk_timer))){+.+...}, at: [] call_timer_fn+0x5/0x570 [ 688.417560] other info that might help us debug this: [ 688.417560] Possible unsafe locking scenario: [ 688.417561] CPU0 [ 688.417561] ---- [ 688.417562] lock(((&req->rsk_timer))); [ 688.417563] lock(((&req->rsk_timer))); [ 688.417564] *** DEADLOCK *** [ 688.417564] May be due to missing lock nesting notation [ 688.417565] 2 locks held by ksoftirqd/0/3: [ 688.417571] #0: (&per_cpu(local_softirq_locks[i], __cpu).lock){+.+.+.}, at: [] do_current_softirqs+0x143/0x820 [ 688.417574] #1: (((&req->rsk_timer))){+.+...}, at: [] call_timer_fn+0x5/0x570 [ 688.417575] stack backtrace: [ 688.417577] CPU: 0 PID: 3 Comm: ksoftirqd/0 Not tainted 4.1.10-rt9+ #4 [ 688.417578] Hardware name: Hewlett-Packard p7-1512/2ADA, BIOS 8.15 02/05/2013 [ 688.417581] 0000000000000000 00000000ba064747 ffff88019327b9c8 ffffffff81824f57 [ 688.417583] 0000000000000000 ffffffff82b33de0 ffff88019327bab8 ffffffff810e78dc [ 688.417584] ffff88019327ba08 ffff8801931dd960 ffff8801931dd960 ffffffff82b05950 [ 688.417585] Call Trace: [ 688.417590] [] dump_stack+0x4a/0x61 [ 688.417594] [] __lock_acquire+0x205c/0x2110 [ 688.417597] [] lock_acquire+0xef/0x2f0 [ 688.417599] [] ? del_timer_sync+0x5/0x190 [ 688.417601] [] ? put_lock_stats.isra.22+0xe/0x40 [ 688.417603] [] del_timer_sync+0x52/0x190 [ 688.417604] [] ? del_timer_sync+0x5/0x190 [ 688.417606] [] ? _raw_spin_unlock+0x35/0x70 [ 688.417610] [] ? rt_spin_lock_slowunlock+0x68/0x70 [ 688.417613] [] inet_csk_reqsk_queue_drop+0xbe/0x210 [ 688.417614] [] reqsk_timer_handler+0xe7/0x2d0 [ 688.417616] [] ? inet_csk_reqsk_queue_drop+0x210/0x210 [ 688.417618] [] call_timer_fn+0xe2/0x570 [ 688.417619] [] ? call_timer_fn+0x5/0x570 [ 688.417620] [] ? inet_csk_reqsk_queue_drop+0x210/0x210 [ 688.417622] [] ? inet_csk_reqsk_queue_drop+0x210/0x210 [ 688.417624] [] run_timer_softirq+0x19c/0x4f0 [ 688.417627] [] do_current_softirqs+0x26d/0x820 [ 688.417630] [] run_ksoftirqd+0x29/0x50 [ 688.417633] [] smpboot_thread_fn+0x207/0x340 [ 688.417636] [] ? smpboot_register_percpu_thread+0x100/0x100 [ 688.417640] [] kthread+0xf6/0x110 [ 688.417643] [] ? wait_for_completion+0xeb/0x120 [ 688.417646] [] ? kthread_create_on_node+0x260/0x260 [ 688.417648] [] ret_from_fork+0x42/0x70 [ 688.417651] [] ? kthread_create_on_node+0x260/0x260 [ 688.418499] NOHZ: local_softirq_pending 02 [ 688.419498] NOHZ: local_softirq_pending 02 [ 688.420151] NOHZ: local_softirq_pending 02 [ 688.420500] NOHZ: local_softirq_pending 82 [ 688.421499] NOHZ: local_softirq_pending 82 [ 688.422497] NOHZ: local_softirq_pending 82 [ 688.423502] NOHZ: local_softirq_pending 82 [ 688.424497] NOHZ: local_softirq_pending 82 [ 688.425497] NOHZ: local_softirq_pending 82 [ 688.426497] NOHZ: local_softirq_pending 82 [ 747.480722] systemd-journald[4585]: File /var/log/journal/69d27b356a94476da859461d3a3bc6fd/system.journal corrupted or uncleanly shut down, renaming and replacing. [ 753.461085] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 753.461088] (detected by 0, t=65002 jiffies, g=75549, c=75548, q=16630) [ 753.461090] All QSes seen, last rcu_preempt kthread activity 65002 (4295420639-4295355637), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 753.461093] swapper/0 R running task 0 0 0 0x00080000 [ 753.461097] ffffffff81e1b4e0 8bcdf5c08bcdf5b6 ffff880198c03d88 ffffffff810be939 [ 753.461099] ffffffff810be865 000000010006eadf ffffffff81e5cdc0 000000000001271d [ 753.461101] ffff880198c03e18 ffffffff81110bae 0000000000000000 0000000000000096 [ 753.461102] Call Trace: [ 753.461110] [] sched_show_task+0x139/0x260 [ 753.461113] [] ? sched_show_task+0x65/0x260 [ 753.461117] [] rcu_check_callbacks+0xd6e/0xd80 [ 753.461121] [] update_process_times+0x3e/0x50 [ 753.461138] [] tick_sched_handle.isra.17+0x25/0x60 [ 753.461140] [] tick_sched_timer+0x47/0x90 [ 753.461142] [] __run_hrtimer+0x106/0x780 [ 753.461144] [] ? hrtimer_interrupt+0x94/0x270 [ 753.461147] [] ? tick_sched_do_timer+0x50/0x50 [ 753.461149] [] hrtimer_interrupt+0x128/0x270 [ 753.461153] [] local_apic_timer_interrupt+0x3a/0x70 [ 753.461157] [] smp_apic_timer_interrupt+0x41/0x60 [ 753.461160] [] apic_timer_interrupt+0x70/0x80 [ 753.461164] [] ? cpuidle_enter_state+0x99/0x3d0 [ 753.461167] [] ? cpuidle_enter_state+0xa4/0x3d0 [ 753.461169] [] ? cpuidle_enter_state+0x99/0x3d0 [ 753.461171] [] cpuidle_enter+0x17/0x20 [ 753.461175] [] cpu_startup_entry+0x3e0/0x650 [ 753.461178] [] rest_init+0x139/0x140 [ 753.461181] [] start_kernel+0x481/0x4a2 [ 753.461184] [] x86_64_start_reservations+0x2a/0x2c [ 753.461186] [] x86_64_start_kernel+0x164/0x173 [ 753.461188] rcu_preempt kthread starved for 65002 jiffies! [ 771.935766] ------------[ cut here ]------------ [ 771.935792] WARNING: CPU: 2 PID: 3913 at /home/lclaudio/SANDBOX/mrg-rt-v2-devel/net/core/request_sock.c:121 reqsk_queue_destroy+0x28b/0x2b0() [ 771.935793] Modules linked in: rfcomm fuse nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw bnep vfat fat coretemp kvm_intel kvm arc4 rt2800pci rt2800mmio rt2800lib rt2x00pci rt2x00mmio rt2x00lib btusb eeprom_93cx6 iTCO_wdt iTCO_vendor_support mac80211 btbcm joydev btintel snd_hda_codec_idt bluetooth snd_hda_codec_generic crc32c_intel snd_hda_intel snd_hda_controller snd_hda_codec snd_hda_core ghash_clmulni_intel snd_hwdep microcode snd_seq cfg802 11 pcspkr [ 771.935818] crc_ccitt [ 771.935818] snd_seq_device [ 771.935819] snd_pcm [ 771.935819] rfkill [ 771.935820] snd_timer [ 771.935820] snd [ 771.935821] soundcore [ 771.935821] tpm_tis [ 771.935821] lpc_ich [ 771.935822] tpm [ 771.935822] shpchp [ 771.935822] mfd_core [ 771.935823] i2c_i801 [ 771.935823] acpi_cpufreq [ 771.935824] nfsd [ 771.935824] auth_rpcgss [ 771.935824] nfs_acl [ 771.935825] lockd [ 771.935825] grace [ 771.935825] sunrpc [ 771.935826] binfmt_misc [ 771.935826] sch_fq_codel [ 771.935827] efivarfs [ 771.935827] serio_raw [ 771.935828] i915 [ 771.935828] i2c_algo_bit [ 771.935828] drm_kms_helper [ 771.935829] drm [ 771.935829] r8169 [ 771.935830] mii [ 771.935830] i2c_core [ 771.935831] video [ 771.935831] usb_storage [ 771.935845] CPU: 2 PID: 3913 Comm: transmission-gt Not tainted 4.1.10-rt9+ #4 [ 771.935846] Hardware name: Hewlett-Packard p7-1512/2ADA, BIOS 8.15 02/05/2013 [ 771.935848] 0000000000000000 0000000095cfbf60 ffff880139497cf8 ffffffff81824f57 [ 771.935852] 0000000000000000 0000000000000000 ffff880139497d38 ffffffff8108622a [ 771.935855] ffff88005de047f8 ffff8800d75d1c40 ffff88005de047f8 ffff88005de04008 [ 771.935858] Call Trace: [ 771.935863] [] dump_stack+0x4a/0x61 [ 771.935867] [] warn_slowpath_common+0x8a/0xe0 [ 771.935869] [] warn_slowpath_null+0x1a/0x20 [ 771.935871] [] reqsk_queue_destroy+0x28b/0x2b0 [ 771.935874] [] inet_csk_listen_stop+0x2f/0x350 [ 771.935876] [] tcp_close+0x45/0x450 [ 771.935880] [] inet_release+0x3f/0x70 [ 771.935883] [] inet6_release+0x30/0x40 [ 771.935885] [] sock_release+0x1f/0x90 [ 771.935887] [] sock_close+0x12/0x20 [ 771.935890] [] __fput+0xf0/0x210 [ 771.935892] [] ____fput+0xe/0x10 [ 771.935895] [] task_work_run+0xcc/0x100 [ 771.935898] [] do_notify_resume+0xc5/0x100 [ 771.935901] [] int_signal+0x12/0x17 [ 771.935903] ---[ end trace 0000000000000002 ]--- [ 771.935905] qlen 1 [ 772.041809] systemd-journald[4585]: File /var/log/journal/69d27b356a94476da859461d3a3bc6fd/user-1000.journal corrupted or uncleanly shut down, renaming and replacing. [ 812.284647] INFO: rcu_sched detected stalls on CPUs/tasks: [ 812.284650] (detected by 0, t=65002 jiffies, g=2, c=1, q=12) [ 812.284651] All QSes seen, last rcu_sched kthread activity 65002 (4295479481-4295414479), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 812.284655] polkitd R running task 0 775 1 0x00080080 [ 812.284658] ffff88018c2f2770 00000000a03f96c2 ffff880198c03d88 ffffffff810be939 [ 812.284659] ffffffff810be865 000000010007d0b9 ffffffff81e5db80 0000000000000002 [ 812.284661] ffff880198c03e18 ffffffff81110bae 0000000000000000 0000000000000096 [ 812.284662] Call Trace: [ 812.284669] [] sched_show_task+0x139/0x260 [ 812.284671] [] ? sched_show_task+0x65/0x260 [ 812.284676] [] rcu_check_callbacks+0xd6e/0xd80 [ 812.284679] [] update_process_times+0x3e/0x50 [ 812.284682] [] tick_sched_handle.isra.17+0x25/0x60 [ 812.284684] [] tick_sched_timer+0x47/0x90 [ 812.284686] [] __run_hrtimer+0x106/0x780 [ 812.284688] [] ? hrtimer_interrupt+0x94/0x270 [ 812.284690] [] ? tick_sched_do_timer+0x50/0x50 [ 812.284692] [] hrtimer_interrupt+0x128/0x270 [ 812.284697] [] local_apic_timer_interrupt+0x3a/0x70 [ 812.284701] [] smp_apic_timer_interrupt+0x41/0x60 [ 812.284703] [] ? __audit_syscall_entry+0xac/0x100 [ 812.284705] [] apic_timer_interrupt+0x70/0x80 [ 812.284708] [] ? __audit_syscall_entry+0xac/0x100 [ 812.284711] [] ? current_kernel_time+0x5b/0xb0 [ 812.284713] [] ? current_kernel_time+0x5d/0xb0 [ 812.284714] [] ? __audit_syscall_entry+0xac/0x100 [ 812.284716] [] __audit_syscall_entry+0xac/0x100 [ 812.284719] [] do_audit_syscall_entry+0x55/0x80 [ 812.284721] [] syscall_trace_enter_phase1+0x14b/0x1b0 [ 812.284724] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 812.284726] [] tracesys+0xd/0x44 [ 812.284729] rcu_sched kthread starved for 65002 jiffies! [ 818.442715] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 818.442718] (detected by 0, t=65002 jiffies, g=75550, c=75549, q=45356) [ 818.442719] All QSes seen, last rcu_preempt kthread activity 65002 (4295485641-4295420639), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 818.442722] polkitd R running task 0 775 1 0x00080080 [ 818.442724] ffff88018c2f2770 00000000a03f96c2 ffff880198c03d88 ffffffff810be939 [ 818.442726] ffffffff810be865 000000010007e8c9 ffffffff81e5cdc0 000000000001271e [ 818.442728] ffff880198c03e18 ffffffff81110bae 0000000000000000 0000000000000096 [ 818.442728] Call Trace: [ 818.442733] [] sched_show_task+0x139/0x260 [ 818.442735] [] ? sched_show_task+0x65/0x260 [ 818.442738] [] rcu_check_callbacks+0xd6e/0xd80 [ 818.442741] [] update_process_times+0x3e/0x50 [ 818.442743] [] tick_sched_handle.isra.17+0x25/0x60 [ 818.442745] [] tick_sched_timer+0x47/0x90 [ 818.442747] [] __run_hrtimer+0x106/0x780 [ 818.442749] [] ? hrtimer_interrupt+0x94/0x270 [ 818.442751] [] ? tick_sched_do_timer+0x50/0x50 [ 818.442753] [] hrtimer_interrupt+0x128/0x270 [ 818.442757] [] local_apic_timer_interrupt+0x3a/0x70 [ 818.442760] [] smp_apic_timer_interrupt+0x41/0x60 [ 818.442762] [] apic_timer_interrupt+0x70/0x80 [ 818.442765] [ 818.442765] rcu_preempt kthread starved for 65002 jiffies! [ 877.266295] INFO: rcu_sched detected stalls on CPUs/tasks: [ 877.266297] (detected by 0, t=65002 jiffies, g=3, c=2, q=9) [ 877.266299] All QSes seen, last rcu_sched kthread activity 65002 (4295544483-4295479481), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 877.266302] polkitd R running task 0 775 1 0x00080080 [ 877.266305] ffff88018c2f2770 00000000a03f96c2 ffff880198c03d88 ffffffff810be939 [ 877.266307] ffffffff810be865 000000010008cea3 ffffffff81e5db80 0000000000000003 [ 877.266309] ffff880198c03e18 ffffffff81110bae 0000000000000000 0000000000000096 [ 877.266310] Call Trace: [ 877.266317] [] sched_show_task+0x139/0x260 [ 877.266319] [] ? sched_show_task+0x65/0x260 [ 877.266323] [] rcu_check_callbacks+0xd6e/0xd80 [ 877.266327] [] update_process_times+0x3e/0x50 [ 877.266330] [] tick_sched_handle.isra.17+0x25/0x60 [ 877.266332] [] tick_sched_timer+0x47/0x90 [ 877.266334] [] __run_hrtimer+0x106/0x780 [ 877.266336] [] ? hrtimer_interrupt+0x94/0x270 [ 877.266338] [] ? tick_sched_do_timer+0x50/0x50 [ 877.266340] [] hrtimer_interrupt+0x128/0x270 [ 877.266344] [] local_apic_timer_interrupt+0x3a/0x70 [ 877.266349] [] smp_apic_timer_interrupt+0x41/0x60 [ 877.266351] [] apic_timer_interrupt+0x70/0x80 [ 877.266355] [] ? add_wait_queue+0x49/0x50 [ 877.266359] [] __pollwait+0x81/0xf0 [ 877.266363] [] eventfd_poll+0x30/0x70 [ 877.266365] [] do_sys_poll+0x36a/0x600 [ 877.266370] [] ? poll_initwait+0x50/0x50 [ 877.266372] [] ? poll_select_copy_remaining+0x180/0x180 [ 877.266375] [] ? poll_select_copy_remaining+0x180/0x180 [ 877.266379] [] ? cpuacct_account_field+0x5/0x1e0 [ 877.266382] [] ? poll_select_set_timeout+0x53/0x80 [ 877.266385] [] ? __audit_syscall_entry+0xac/0x100 [ 877.266387] [] ? trace_hardirqs_on+0xd/0x10 [ 877.266390] [] ? ktime_get_ts64+0xa2/0x180 [ 877.266392] [] ? poll_select_set_timeout+0x53/0x80 [ 877.266395] [] ? do_audit_syscall_entry+0x55/0x80 [ 877.266398] [] SyS_poll+0x71/0x130 [ 877.266400] [] system_call_fastpath+0x12/0x6f [ 877.266402] rcu_sched kthread starved for 65002 jiffies! [ 883.424366] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 883.424369] (detected by 0, t=65002 jiffies, g=75551, c=75550, q=44199) [ 883.424371] All QSes seen, last rcu_preempt kthread activity 65002 (4295550643-4295485641), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 883.424374] polkitd R running task 0 775 1 0x00080080 [ 883.424377] ffff88018c2f2770 00000000a03f96c2 ffff880198c03d88 ffffffff810be939 [ 883.424379] ffffffff810be865 000000010008e6b3 ffffffff81e5cdc0 000000000001271f [ 883.424381] ffff880198c03e18 ffffffff81110bae 0000000000000000 0000000000000096 [ 883.424381] Call Trace: [ 883.424389] [] sched_show_task+0x139/0x260 [ 883.424391] [] ? sched_show_task+0x65/0x260 [ 883.424396] [] rcu_check_callbacks+0xd6e/0xd80 [ 883.424398] [] update_process_times+0x3e/0x50 [ 883.424402] [] tick_sched_handle.isra.17+0x25/0x60 [ 883.424404] [] tick_sched_timer+0x47/0x90 [ 883.424406] [] __run_hrtimer+0x106/0x780 [ 883.424407] [] ? hrtimer_interrupt+0x94/0x270 [ 883.424409] [] ? tick_sched_do_timer+0x50/0x50 [ 883.424412] [] hrtimer_interrupt+0x128/0x270 [ 883.424416] [] local_apic_timer_interrupt+0x3a/0x70 [ 883.424420] [] smp_apic_timer_interrupt+0x41/0x60 [ 883.424422] [] apic_timer_interrupt+0x70/0x80 [ 883.424426] [ 883.424426] rcu_preempt kthread starved for 65002 jiffies! [ 942.247977] INFO: rcu_sched detected stalls on CPUs/tasks: [ 942.247979] (detected by 0, t=65002 jiffies, g=4, c=3, q=12) [ 942.247980] All QSes seen, last rcu_sched kthread activity 65002 (4295609485-4295544483), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 942.247982] swapper/0 R running task 0 0 0 0x00080000 [ 942.247984] ffffffff81e1b4e0 8bcdf5c08bcdf5b6 ffff880198c03d88 ffffffff810be939 [ 942.247985] ffffffff810be865 000000010009cc8d ffffffff81e5db80 0000000000000004 [ 942.247987] ffff880198c03e18 ffffffff81110bae 0000000000000000 0000000000000096 [ 942.247987] Call Trace: [ 942.247993] [] sched_show_task+0x139/0x260 [ 942.247994] [] ? sched_show_task+0x65/0x260 [ 942.247997] [] rcu_check_callbacks+0xd6e/0xd80 [ 942.247999] [] update_process_times+0x3e/0x50 [ 942.248002] [] tick_sched_handle.isra.17+0x25/0x60 [ 942.248015] [] tick_sched_timer+0x47/0x90 [ 942.248016] [] __run_hrtimer+0x106/0x780 [ 942.248017] [] ? hrtimer_interrupt+0x94/0x270 [ 942.248031] [] ? tick_sched_do_timer+0x50/0x50 [ 942.248032] [] hrtimer_interrupt+0x128/0x270 [ 942.248035] [] local_apic_timer_interrupt+0x3a/0x70 [ 942.248038] [] smp_apic_timer_interrupt+0x41/0x60 [ 942.248039] [] apic_timer_interrupt+0x70/0x80 [ 942.248042] [] ? cpuidle_enter_state+0x99/0x3d0 [ 942.248043] [] ? cpuidle_enter_state+0xa4/0x3d0 [ 942.248045] [] ? cpuidle_enter_state+0x99/0x3d0 [ 942.248046] [] cpuidle_enter+0x17/0x20 [ 942.248049] [] cpu_startup_entry+0x3e0/0x650 [ 942.248050] [] rest_init+0x139/0x140 [ 942.248053] [] start_kernel+0x481/0x4a2 [ 942.248055] [] x86_64_start_reservations+0x2a/0x2c [ 942.248056] [] x86_64_start_kernel+0x164/0x173 [ 942.248058] rcu_sched kthread starved for 65002 jiffies! [ 948.406053] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 948.406055] (detected by 1, t=65002 jiffies, g=75552, c=75551, q=34053) [ 948.406056] All QSes seen, last rcu_preempt kthread activity 65002 (4295615645-4295550643), jiffies_till_next_fqs=3, root ->qsmask 0x0 [ 948.406057] swapper/1 R running task 0 0 1 0x00080000 [ 948.406059] ffff8801932ea770 90ec857a90ec8570 ffff880198e03d88 ffffffff810be939 [ 948.406060] ffffffff810be865 000000010009e49d ffffffff81e5cdc0 0000000000012720 [ 948.406061] ffff880198e03e18 ffffffff81110bae 0000000000000000 0000000000000096 [ 948.406062] Call Trace: [ 948.406065] [] sched_show_task+0x139/0x260 [ 948.406067] [] ? sched_show_task+0x65/0x260 [ 948.406069] [] rcu_check_callbacks+0xd6e/0xd80 [ 948.406070] [] update_process_times+0x3e/0x50 [ 948.406072] [] tick_sched_handle.isra.17+0x25/0x60 [ 948.406073] [] tick_sched_timer+0x47/0x90 [ 948.406075] [] __run_hrtimer+0x106/0x780 [ 948.406088] [] ? hrtimer_interrupt+0x94/0x270 [ 948.406089] [] ? tick_sched_do_timer+0x50/0x50 [ 948.406090] [] hrtimer_interrupt+0x128/0x270 [ 948.406104] [] local_apic_timer_interrupt+0x3a/0x70 [ 948.406106] [] smp_apic_timer_interrupt+0x41/0x60 [ 948.406107] [] apic_timer_interrupt+0x70/0x80 [ 948.406110] [] ? cpuidle_enter_state+0x99/0x3d0 [ 948.406111] [] ? cpuidle_enter_state+0xa4/0x3d0 [ 948.406112] [] ? cpuidle_enter_state+0x99/0x3d0 [ 948.406114] [] cpuidle_enter+0x17/0x20 [ 948.406116] [] cpu_startup_entry+0x3e0/0x650 [ 948.406118] [] start_secondary+0x17c/0x1c0 [ 948.406119] rcu_preempt kthread starved for 65002 jiffies! -- [ Luis Claudio R. Goncalves Bass - Gospel - RT ] [ Fingerprint: 4FDD B8C4 3C59 34BD 8BE9 2696 7203 D980 A448 C8F8 ]