From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78968C433E0 for ; Fri, 10 Jul 2020 22:50:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0CC4206E2 for ; Fri, 10 Jul 2020 22:50:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=xs4all.nl header.i=@xs4all.nl header.b="a+47NMz0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726480AbgGJWud (ORCPT ); Fri, 10 Jul 2020 18:50:33 -0400 Received: from lb3-smtp-cloud9.xs4all.net ([194.109.24.30]:40181 "EHLO lb3-smtp-cloud9.xs4all.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726262AbgGJWuc (ORCPT ); Fri, 10 Jul 2020 18:50:32 -0400 Received: from cust-3a8def63 ([IPv6:fc0c:c1c9:903d:e9b4:326e:d2bd:718e:17cc]) by smtp-cloud9.xs4all.net with ESMTPSA id u1qWjwq4e5flqu1qXjpltp; Sat, 11 Jul 2020 00:50:24 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xs4all.nl; s=s1; t=1594421424; bh=lB5CkUD3IEUd5BIbeV90EDkhaimQwO2lb1DD68nJxKM=; h=Date:From:To:Subject:Message-ID:MIME-Version:Content-Type:From: Subject; b=a+47NMz0KLpeUws99lrjdpc+/Jheu0ZHVGpnPeamDBfOkr8Z01f7sSxNVq3S0QKzu qObXkhJEk+qBicPSXvBnQ4YGKPZv/V+3zbc9/DtSb4OznrLxEgt5mEE/PWKS9H7soT xKxUhgsE22axW+hXRg50aEPf3ecMTdah/hwvlrveGLrT+S+26wDeflVOLhkHvcceix WEXzsIR4SHysEa9Lu69grTfqMO0tuZx0YGsfZgO/mCYPsjecNiiwW/+TdZ0gbS0U6K dHJwLalwhMEoAXUJaozj3qUDE+IigVKJ4i1VvIWKCutwG4OSmvs0NUT0cTkHkXWSTT Eskps0msFwR+Q== Date: Sat, 11 Jul 2020 00:50:18 +0200 From: Jeroen Roovers To: John David Anglin Cc: Rolf Eike Beer , linux-parisc , Helge Deller , James Bottomley Subject: Re: [PATCH] parisc: Fix spinlock barriers Message-ID: <20200711005018.05540239@wim.jer> In-Reply-To: <595e592a-36a5-e90f-e661-c5e52ec7753d@bell.net> References: <9b28e07e-3d11-d24b-410b-4732a828e588@bell.net> <35432085.F4uqhuS8rR@daneel.sf-tec.de> <595e592a-36a5-e90f-e661-c5e52ec7753d@bell.net> X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="MP_/N41L.0PvKDRD_zJ3Pm8=AFc" X-CMAE-Envelope: MS4wfI8Krqu1Nt0GFYI7OSgh6ov5shLHckvZ35Yk2H64qf6uRICl0onaMdyiVOhws6x/627xFWtSCuUmOLAPre/FPywfYQVYCwhkA2AD9l1IdvgyGoxX2LRU FX3SyM31b7usd1oRohsg/HtiBvQf8T3HVLkLLQSQ7mP/zT1E+hcLgsXJ/49v7/6huwJ/2Ww7HJRGXQUCULfDsdU37X6fRpj8VQ1d/ccfsQec59zMQ44k+mFG puIgjIwqOlHrYM4cxDAZf6Ng8wqatmgsAzi7Vkjx3zKlN1wQ/8/ETIUP5wpq/Fzzb4oFWtCzb2pILoIPZCcPFQ== Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org --MP_/N41L.0PvKDRD_zJ3Pm8=AFc Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline On Thu, 9 Jul 2020 09:39:33 -0400 John David Anglin wrote: > On 2020-07-09 9:26 a.m., Rolf Eike Beer wrote: > > Am Freitag, 3. Juli 2020, 22:32:35 CEST schrieb John David Anglin: > >> Stalls are quite frequent with recent kernels. When the stall is > >> detected by rcu_sched, we get a backtrace similar to the > >> following: > > With this patch on top of 5.7.7 I still get: > Suggest enabling CONFIG_LOCKUP_DETECTOR=y and > CONFIG_SOFTLOCKUP_DETECTOR=y so we can see where the stall occurs. > > Dave > Attached is kernel output while running the futex_requeue_pi test from the kernel selftests. It failed this way on the second try while it passed on the first try. The output it gave is with the kernel configuration options as set out above. Kind regards, jer --MP_/N41L.0PvKDRD_zJ3Pm8=AFc Content-Type: text/plain Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=hung.txt [32627.869720][ C0] sched: RT throttling activated [32627.869720][ C0] sched: RT throttling activated [32758.890722][ T184] INFO: task futex_requeue_p:11776 blocked for more than 120 seconds. [32758.890722][ T184] INFO: task futex_requeue_p:11776 blocked for more than 120 seconds. [32759.092374][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [32759.092374][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [32759.283055][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [32759.283055][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [32759.497698][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [32759.497698][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [32759.653327][ T184] Backtrace: [32759.653327][ T184] Backtrace: [32759.730236][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [32759.730236][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [32759.894604][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [32759.894604][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [32760.041479][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [32760.041479][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [32760.197084][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [32760.197084][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [32760.346148][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [32760.346148][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [32760.499589][ T184] [32760.499589][ T184] [32783.829356][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [32783.829356][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [32783.942594][ C0] rcu: 0-...!: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479791/479792 fqs=0 [32783.942594][ C0] rcu: 0-...!: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479791/479792 fqs=0 [32783.942594][ C0] (detected by 0, t=5252 jiffies, g=628645, q=403) [32783.942594][ C0] (detected by 0, t=5252 jiffies, g=628645, q=403) [32783.942594][ C0] Task dump for CPU 0: [32783.942594][ C0] Task dump for CPU 0: [32783.942594][ C0] futex_requeue_p R running task 0 11780 11689 0x00000010 [32783.942594][ C0] futex_requeue_p R running task 0 11780 11689 0x00000010 [32783.942594][ C0] Backtrace: [32783.942594][ C0] Backtrace: [32783.942594][ C0] [<0000000040247130>] show_stack+0x50/0x70 [32783.942594][ C0] [<0000000040247130>] show_stack+0x50/0x70 [32783.942594][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [32783.942594][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [32783.942594][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [32783.942594][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [32783.942594][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [32783.942594][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [32783.942594][ C0] [<00000000403052b4>] rcu_sched_clock_irq+0xa14/0xb58 [32783.942594][ C0] [<00000000403052b4>] rcu_sched_clock_irq+0xa14/0xb58 [32783.942594][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [32783.942594][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [32783.942594][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [32783.942594][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [32783.942594][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [32783.942594][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [32783.942594][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [32783.942594][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [32783.942594][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [32783.942594][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [32783.942594][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [32783.942594][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [32783.942594][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [32783.942594][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [32783.942594][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [32783.942594][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [32783.942594][ C0] [<000000004024d074>] intr_return+0x0/0xc [32783.942594][ C0] [<000000004024d074>] intr_return+0x0/0xc [32783.942594][ C0] [32783.942594][ C0] [32885.902861][ T184] INFO: task futex_requeue_p:11776 blocked for more than 248 seconds. [32885.902861][ T184] INFO: task futex_requeue_p:11776 blocked for more than 248 seconds. [32886.104469][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [32886.104469][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [32886.295068][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [32886.295068][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [32886.509754][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [32886.509754][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [32886.665385][ T184] Backtrace: [32886.665385][ T184] Backtrace: [32886.742274][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [32886.742274][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [32886.906682][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [32886.906682][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [32887.053516][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [32887.053516][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [32887.209140][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [32887.209140][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [32887.358204][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [32887.358204][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [32887.511637][ T184] [32887.511637][ T184] [33020.862709][ T184] INFO: task futex_requeue_p:11776 blocked for more than 382 seconds. [33020.862709][ T184] INFO: task futex_requeue_p:11776 blocked for more than 382 seconds. [33021.064414][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33021.064414][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33021.255143][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33021.255143][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33021.469860][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33021.469860][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33021.625579][ T184] Backtrace: [33021.625579][ T184] Backtrace: [33021.702420][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33021.702420][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33021.866875][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33021.866875][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33022.013832][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33022.013832][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33022.169549][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33022.169549][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33022.318656][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33022.318656][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33022.472089][ T184] [33022.472089][ T184] [33031.888801][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [33031.888801][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [33031.898353][ C0] (detected by 0, t=5252 jiffies, g=628793, q=10) [33031.898353][ C0] (detected by 0, t=5252 jiffies, g=628793, q=10) [33031.898353][ C0] rcu: All QSes seen, last rcu_sched kthread activity 5252 (4303150277-4303145025), jiffies_till_next_fqs=1, root ->qsmask 0x0 [33031.898353][ C0] rcu: All QSes seen, last rcu_sched kthread activity 5252 (4303150277-4303145025), jiffies_till_next_fqs=1, root ->qsmask 0x0 [33031.898353][ C0] rcu: rcu_sched kthread starved for 5252 jiffies! g628793 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [33031.898353][ C0] rcu: rcu_sched kthread starved for 5252 jiffies! g628793 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [33031.898353][ C0] rcu: Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior. [33031.898353][ C0] rcu: Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior. [33031.898353][ C0] rcu: RCU grace-period kthread stack dump: [33031.898353][ C0] rcu: RCU grace-period kthread stack dump: [33031.898353][ C0] rcu_sched R running task 0 10 2 0x00000000 [33031.898353][ C0] rcu_sched R running task 0 10 2 0x00000000 [33031.898353][ C0] Backtrace: [33031.898353][ C0] Backtrace: [33031.898353][ C0] [33031.898353][ C0] [33067.872720][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33067.872720][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33067.872720][ C0] rcu: 0-....: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479896/479897 fqs=13 [33067.872720][ C0] rcu: 0-....: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479896/479897 fqs=13 [33067.872720][ C0] (t=5250 jiffies g=628797 q=7) [33067.872720][ C0] (t=5250 jiffies g=628797 q=7) [33067.872720][ C0] Task dump for CPU 0: [33067.872720][ C0] Task dump for CPU 0: [33067.872720][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33067.872720][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33067.872720][ C0] Backtrace: [33067.872720][ C0] Backtrace: [33067.872720][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33067.872720][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33067.872720][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33067.872720][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33067.872720][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33067.872720][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33067.872720][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33067.872720][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33067.872720][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33067.872720][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33067.872720][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33067.872720][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33067.872720][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33067.872720][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33067.872720][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33067.872720][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33067.872720][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33067.872720][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33067.872720][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33067.872720][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33067.872720][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33067.872720][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33067.872720][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33067.872720][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33067.872720][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33067.872720][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33067.872720][ C0] [<000000004024d074>] intr_return+0x0/0xc [33067.872720][ C0] [<000000004024d074>] intr_return+0x0/0xc [33067.872720][ C0] [33067.872720][ C0] [33130.884579][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33130.884579][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33130.884579][ C0] rcu: 0-....: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479896/479897 fqs=39 [33130.884579][ C0] rcu: 0-....: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479896/479897 fqs=39 [33130.884579][ C0] (t=21003 jiffies g=628797 q=13) [33130.884579][ C0] (t=21003 jiffies g=628797 q=13) [33130.884579][ C0] Task dump for CPU 0: [33130.884579][ C0] Task dump for CPU 0: [33130.884579][ C0] futex_requeue_p R running task 0 11780 11689 0x00000010 [33130.884579][ C0] futex_requeue_p R running task 0 11780 11689 0x00000010 [33130.884579][ C0] Backtrace: [33130.884579][ C0] Backtrace: [33130.884579][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33130.884579][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33130.884579][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33130.884579][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33130.884579][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33130.884579][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33130.884579][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33130.884579][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33130.884579][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33130.884579][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33130.884579][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33130.884579][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33130.884579][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33130.884579][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33130.884579][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33130.884579][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33130.884579][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33130.884579][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33130.884579][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33130.884579][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33130.884579][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33130.884579][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33130.884579][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33130.884579][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33130.884579][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33130.884579][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33130.884579][ C0] [<000000004024d074>] intr_return+0x0/0xc [33130.884579][ C0] [<000000004024d074>] intr_return+0x0/0xc [33130.884579][ C0] [33130.884579][ C0] [33153.913692][ T184] INFO: task futex_requeue_p:11776 blocked for more than 516 seconds. [33153.913692][ T184] INFO: task futex_requeue_p:11776 blocked for more than 516 seconds. [33154.115244][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33154.115244][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33154.305853][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33154.305853][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33154.520542][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33154.520542][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33154.676172][ T184] Backtrace: [33154.676172][ T184] Backtrace: [33154.753060][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33154.753060][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33154.917428][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33154.917428][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33155.064301][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33155.064301][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33155.219926][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33155.219926][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33155.368990][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33155.368990][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33155.522424][ T184] [33155.522424][ T184] [33193.896438][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33193.896438][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33193.896438][ C0] rcu: 0-....: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479896/479897 fqs=65 [33193.896438][ C0] rcu: 0-....: (1 GPs behind) idle=00e/1/0x4000000000000002 softirq=479896/479897 fqs=65 [33193.896438][ C0] (t=36756 jiffies g=628797 q=18) [33193.896438][ C0] (t=36756 jiffies g=628797 q=18) [33193.896438][ C0] Task dump for CPU 0: [33193.896438][ C0] Task dump for CPU 0: [33193.896438][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33193.896438][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33193.896438][ C0] Backtrace: [33193.896438][ C0] Backtrace: [33193.896438][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33193.896438][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33193.896438][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33193.896438][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33193.896438][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33193.896438][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33193.896438][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33193.896438][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33193.896438][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33193.896438][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33193.896438][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33193.896438][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33193.896438][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33193.896438][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33193.896438][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33193.896438][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33193.896438][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33193.896438][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33193.896438][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33193.896438][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33193.896438][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33193.896438][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33193.896438][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33193.896438][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33193.896438][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33193.896438][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33193.896438][ C0] [<000000004024d074>] intr_return+0x0/0xc [33193.896438][ C0] [<000000004024d074>] intr_return+0x0/0xc [33193.896438][ C0] [33193.896438][ C0] [33251.868309][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33251.868309][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33251.868309][ C0] rcu: 0-....: (2 GPs behind) idle=012/1/0x4000000000000002 softirq=479896/479897 fqs=15 [33251.868309][ C0] rcu: 0-....: (2 GPs behind) idle=012/1/0x4000000000000002 softirq=479896/479897 fqs=15 [33251.868309][ C0] (t=5250 jiffies g=628801 q=38) [33251.868309][ C0] (t=5250 jiffies g=628801 q=38) [33251.868309][ C0] Task dump for CPU 0: [33251.868309][ C0] Task dump for CPU 0: [33251.868309][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33251.868309][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33251.868309][ C0] Backtrace: [33251.868309][ C0] Backtrace: [33251.868309][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33251.868309][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33251.868309][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33251.868309][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33251.868309][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33251.868309][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33251.868309][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33251.868309][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33251.868309][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33251.868309][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33251.868309][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33251.868309][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33251.868309][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33251.868309][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33251.868309][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33251.868309][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33251.868309][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33251.868309][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33251.868309][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33251.868309][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33251.868309][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33251.868309][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33251.868309][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33251.868309][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33251.868309][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33251.868309][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33251.868309][ C0] [<000000004024d074>] intr_return+0x0/0xc [33251.868309][ C0] [<000000004024d074>] intr_return+0x0/0xc [33251.868309][ C0] [33251.868309][ C0] [33314.880168][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33314.880168][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33314.880168][ C0] rcu: 0-....: (2 GPs behind) idle=012/1/0x4000000000000002 softirq=479896/479897 fqs=39 [33314.880168][ C0] rcu: 0-....: (2 GPs behind) idle=012/1/0x4000000000000002 softirq=479896/479897 fqs=39 [33314.880168][ C0] (t=21003 jiffies g=628801 q=43) [33314.880168][ C0] (t=21003 jiffies g=628801 q=43) [33315.285850][ C0] Task dump for CPU 0: [33315.285850][ C0] Task dump for CPU 0: [33315.285850][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33315.285850][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33315.285850][ C0] Backtrace: [33315.285850][ C0] Backtrace: [33315.285850][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33315.285850][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33315.285850][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33315.285850][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33315.285850][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33315.285850][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33315.285850][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33315.285850][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33315.285850][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33315.285850][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33315.285850][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33315.285850][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33315.285850][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33315.285850][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33315.285850][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33315.285850][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33315.285850][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33315.285850][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33315.285850][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33315.285850][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33315.285850][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33315.285850][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33315.285850][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33315.285850][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33315.285850][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33315.285850][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33315.285850][ C0] [<000000004024d074>] intr_return+0x0/0xc [33315.285850][ C0] [<000000004024d074>] intr_return+0x0/0xc [33315.285850][ C0] [33315.285850][ C0] [33373.917674][ T184] INFO: task futex_requeue_p:11776 blocked for more than 736 seconds. [33373.917674][ T184] INFO: task futex_requeue_p:11776 blocked for more than 736 seconds. [33374.119359][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33374.119359][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33374.310076][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33374.310076][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33374.524852][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33374.524852][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33374.680482][ T184] Backtrace: [33374.680482][ T184] Backtrace: [33374.757334][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33374.757334][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33374.921784][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33374.921784][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33375.068731][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33375.068731][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33375.224462][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33375.224462][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33375.373621][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33375.373621][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33375.527000][ T184] [33375.527000][ T184] [33377.892027][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33377.892027][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33377.892027][ C0] rcu: 0-....: (2 GPs behind) idle=012/1/0x4000000000000002 softirq=479896/479897 fqs=60 [33377.892027][ C0] rcu: 0-....: (2 GPs behind) idle=012/1/0x4000000000000002 softirq=479896/479897 fqs=60 [33377.892027][ C0] (t=36756 jiffies g=628801 q=49) [33377.892027][ C0] (t=36756 jiffies g=628801 q=49) [33377.892027][ C0] Task dump for CPU 0: [33377.892027][ C0] Task dump for CPU 0: [33377.892027][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33377.892027][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33377.892027][ C0] Backtrace: [33377.892027][ C0] Backtrace: [33377.892027][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33377.892027][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33377.892027][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33377.892027][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33377.892027][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33377.892027][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33377.892027][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33377.892027][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33377.892027][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33377.892027][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33377.892027][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33377.892027][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33377.892027][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33377.892027][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33377.892027][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33377.892027][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33377.892027][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33377.892027][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33377.892027][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33377.892027][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33377.892027][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33377.892027][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33377.892027][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33377.892027][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33377.892027][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33377.892027][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33377.892027][ C0] [<000000004024d074>] intr_return+0x0/0xc [33377.892027][ C0] [<000000004024d074>] intr_return+0x0/0xc [33377.892027][ C0] [33377.892027][ C0] [33440.871886][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33440.871886][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33440.871886][ C0] rcu: 0-....: (3 GPs behind) idle=016/1/0x4000000000000002 softirq=479896/479897 fqs=11 [33440.871886][ C0] rcu: 0-....: (3 GPs behind) idle=016/1/0x4000000000000002 softirq=479896/479897 fqs=11 [33440.871886][ C0] (t=5250 jiffies g=628805 q=23) [33440.871886][ C0] (t=5250 jiffies g=628805 q=23) [33440.871886][ C0] Task dump for CPU 0: [33440.871886][ C0] Task dump for CPU 0: [33440.871886][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33440.871886][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33440.871886][ C0] Backtrace: [33440.871886][ C0] Backtrace: [33440.871886][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33440.871886][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33440.871886][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33440.871886][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33440.871886][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33440.871886][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33440.871886][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33440.871886][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33440.871886][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33440.871886][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33440.871886][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33440.871886][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33440.871886][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33440.871886][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33440.871886][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33440.871886][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33440.871886][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33440.871886][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33440.871886][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33440.871886][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33440.871886][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33440.871886][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33440.871886][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33440.871886][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33440.871886][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33440.871886][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33440.871886][ C0] [<000000004024d074>] intr_return+0x0/0xc [33440.871886][ C0] [<000000004024d074>] intr_return+0x0/0xc [33440.871886][ C0] [33440.871886][ C0] [33477.879803][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33477.879803][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33477.879803][ C0] rcu: 0-....: (4 GPs behind) idle=01a/1/0x4000000000000002 softirq=479896/479897 fqs=13 [33477.879803][ C0] rcu: 0-....: (4 GPs behind) idle=01a/1/0x4000000000000002 softirq=479896/479897 fqs=13 [33477.879803][ C0] (t=5250 jiffies g=628809 q=10) [33477.879803][ C0] (t=5250 jiffies g=628809 q=10) [33477.879803][ C0] Task dump for CPU 0: [33477.879803][ C0] Task dump for CPU 0: [33477.879803][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33477.879803][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33477.879803][ C0] Backtrace: [33477.879803][ C0] Backtrace: [33477.879803][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33477.879803][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33477.879803][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33477.879803][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33477.879803][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33477.879803][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33477.879803][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33477.879803][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33477.879803][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33477.879803][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33477.879803][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33477.879803][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33477.879803][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33477.879803][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33477.879803][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33477.879803][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33477.879803][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33477.879803][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33477.879803][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33477.879803][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33477.879803][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33477.879803][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33477.879803][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33477.879803][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33477.879803][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33477.879803][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33477.879803][ C0] [<000000004024d074>] intr_return+0x0/0xc [33477.879803][ C0] [<000000004024d074>] intr_return+0x0/0xc [33477.879803][ C0] [33477.879803][ C0] [33524.859698][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33524.859698][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33524.859698][ C0] rcu: 0-....: (5 GPs behind) idle=01e/1/0x4000000000000002 softirq=479896/479897 fqs=10 [33524.859698][ C0] rcu: 0-....: (5 GPs behind) idle=01e/1/0x4000000000000002 softirq=479896/479897 fqs=10 [33524.859698][ C0] (t=5250 jiffies g=628813 q=10) [33524.859698][ C0] (t=5250 jiffies g=628813 q=10) [33524.859698][ C0] Task dump for CPU 0: [33524.859698][ C0] Task dump for CPU 0: [33524.859698][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33524.859698][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33524.859698][ C0] Backtrace: [33524.859698][ C0] Backtrace: [33524.859698][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33524.859698][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33524.859698][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33524.859698][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33524.859698][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33524.859698][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33524.859698][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33524.859698][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33524.859698][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33524.859698][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33524.859698][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33524.859698][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33524.859698][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33524.859698][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33524.859698][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33524.859698][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33524.859698][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33524.859698][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33524.859698][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33524.859698][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33524.859698][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33524.859698][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33524.859698][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33524.859698][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33524.859698][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33524.859698][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33524.859698][ C0] [<000000004024d074>] intr_return+0x0/0xc [33524.859698][ C0] [<000000004024d074>] intr_return+0x0/0xc [33524.859698][ C0] [33524.859698][ C0] [33578.896996][ T184] INFO: task futex_requeue_p:11776 blocked for more than 941 seconds. [33578.896996][ T184] INFO: task futex_requeue_p:11776 blocked for more than 941 seconds. [33579.098653][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33579.098653][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33579.289329][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33579.289329][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33579.504112][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33579.504112][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33579.659740][ T184] Backtrace: [33579.659740][ T184] Backtrace: [33579.736581][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33579.736581][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33579.901052][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33579.901052][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33580.047996][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33580.047996][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33580.203655][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33580.203655][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33580.352718][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33580.352718][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33580.506158][ T184] [33580.506158][ T184] [33587.871557][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33587.871557][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33587.871557][ C0] rcu: 0-....: (5 GPs behind) idle=01e/1/0x4000000000000002 softirq=479896/479897 fqs=36 [33587.871557][ C0] rcu: 0-....: (5 GPs behind) idle=01e/1/0x4000000000000002 softirq=479896/479897 fqs=36 [33587.871557][ C0] (t=21003 jiffies g=628813 q=15) [33587.871557][ C0] (t=21003 jiffies g=628813 q=15) [33587.871557][ C0] Task dump for CPU 0: [33587.871557][ C0] Task dump for CPU 0: [33587.871557][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33587.871557][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33587.871557][ C0] Backtrace: [33587.871557][ C0] Backtrace: [33587.871557][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33587.871557][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33587.871557][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33587.871557][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33587.871557][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33587.871557][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33587.871557][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33587.871557][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33587.871557][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33587.871557][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33587.871557][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33587.871557][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33587.871557][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33587.871557][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33587.871557][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33587.871557][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33587.871557][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33587.871557][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33587.871557][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33587.871557][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33587.871557][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33587.871557][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33587.871557][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33587.871557][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33587.871557][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33587.871557][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33587.871557][ C0] [<000000004024d074>] intr_return+0x0/0xc [33587.871557][ C0] [<000000004024d074>] intr_return+0x0/0xc [33587.871557][ C0] [33587.871557][ C0] [33623.895477][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33623.895477][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33623.895477][ C0] rcu: 0-....: (6 GPs behind) idle=022/1/0x4000000000000002 softirq=479896/479897 fqs=13 [33623.895477][ C0] rcu: 0-....: (6 GPs behind) idle=022/1/0x4000000000000002 softirq=479896/479897 fqs=13 [33623.895477][ C0] (t=5250 jiffies g=628817 q=11) [33623.895477][ C0] (t=5250 jiffies g=628817 q=11) [33623.895477][ C0] Task dump for CPU 0: [33623.895477][ C0] Task dump for CPU 0: [33623.895477][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33623.895477][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33623.895477][ C0] Backtrace: [33623.895477][ C0] Backtrace: [33623.895477][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33623.895477][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33623.895477][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33623.895477][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33623.895477][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33623.895477][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33623.895477][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33623.895477][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33623.895477][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33623.895477][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33623.895477][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33623.895477][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33623.895477][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33623.895477][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33623.895477][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33623.895477][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33623.895477][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33623.895477][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33623.895477][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33623.895477][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33623.895477][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33623.895477][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33623.895477][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33623.895477][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33623.895477][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33623.895477][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33623.895477][ C0] [<000000004024d074>] intr_return+0x0/0xc [33623.895477][ C0] [<000000004024d074>] intr_return+0x0/0xc [33623.895477][ C0] [33623.895477][ C0] [33686.907335][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33686.907335][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33686.908471][ C0] rcu: 0-....: (6 GPs behind) idle=022/1/0x4000000000000002 softirq=479896/479897 fqs=38 [33686.908471][ C0] rcu: 0-....: (6 GPs behind) idle=022/1/0x4000000000000002 softirq=479896/479897 fqs=38 [33686.908471][ C0] (t=21003 jiffies g=628817 q=29) [33686.908471][ C0] (t=21003 jiffies g=628817 q=29) [33686.908471][ C0] Task dump for CPU 0: [33686.908471][ C0] Task dump for CPU 0: [33686.908471][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33686.908471][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33686.908471][ C0] Backtrace: [33686.908471][ C0] Backtrace: [33686.908471][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33686.908471][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33686.908471][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33686.908471][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33686.908471][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33686.908471][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33686.908471][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33686.908471][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33686.908471][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33686.908471][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33686.908471][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33686.908471][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33686.908471][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33686.908471][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33686.908471][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33686.908471][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33686.908471][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33686.908471][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33686.908471][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33686.908471][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33686.908471][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33686.908471][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33686.908471][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33686.908471][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33686.908471][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33686.908471][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33686.908471][ C0] [<000000004024d074>] intr_return+0x0/0xc [33686.908471][ C0] [<000000004024d074>] intr_return+0x0/0xc [33686.908471][ C0] [33686.908471][ C0] [33749.919195][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33749.919195][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [33749.919195][ C0] rcu: 0-....: (6 GPs behind) idle=022/1/0x4000000000000002 softirq=479896/479897 fqs=68 [33749.919195][ C0] rcu: 0-....: (6 GPs behind) idle=022/1/0x4000000000000002 softirq=479896/479897 fqs=68 [33749.919195][ C0] (t=36756 jiffies g=628817 q=35) [33749.919195][ C0] (t=36756 jiffies g=628817 q=35) [33749.919195][ C0] Task dump for CPU 0: [33749.919195][ C0] Task dump for CPU 0: [33749.919195][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33749.919195][ C0] futex_requeue_p R running task 0 11780 11689 0x00000014 [33749.919195][ C0] Backtrace: [33749.919195][ C0] Backtrace: [33749.919195][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33749.919195][ C0] [<0000000040247130>] show_stack+0x50/0x70 [33749.919195][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33749.919195][ C0] [<00000000402b8ed8>] sched_show_task.part.0+0x150/0x170 [33749.919195][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33749.919195][ C0] [<00000000402b90f8>] dump_cpu_task+0x68/0x80 [33749.919195][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33749.919195][ C0] [<0000000040306568>] rcu_dump_cpu_stacks+0x110/0x178 [33749.919195][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33749.919195][ C0] [<0000000040305088>] rcu_sched_clock_irq+0x7e8/0xb58 [33749.919195][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33749.919195][ C0] [<000000004030c8b8>] update_process_times+0x58/0xb8 [33749.919195][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33749.919195][ C0] [<00000000409e8160>] timer_interrupt+0xb0/0x120 [33749.919195][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33749.919195][ C0] [<00000000402ec738>] __handle_irq_event_percpu+0xb8/0x238 [33749.919195][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33749.919195][ C0] [<00000000402ec8ec>] handle_irq_event_percpu+0x34/0xb8 [33749.919195][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33749.919195][ C0] [<00000000402f4630>] handle_percpu_irq+0xa8/0xe8 [33749.919195][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33749.919195][ C0] [<00000000402eb7d0>] generic_handle_irq+0x60/0x78 [33749.919195][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33749.919195][ C0] [<000000004024e340>] call_on_stack+0x18/0x24 [33749.919195][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33749.919195][ C0] [<0000000040249d60>] do_cpu_irq_mask+0x320/0x450 [33749.919195][ C0] [<000000004024d074>] intr_return+0x0/0xc [33749.919195][ C0] [<000000004024d074>] intr_return+0x0/0xc [33749.919195][ C0] [33749.919195][ C0] [33801.861080][ T184] INFO: task futex_requeue_p:11776 blocked for more than 1163 seconds. [33801.861080][ T184] INFO: task futex_requeue_p:11776 blocked for more than 1163 seconds. [33802.064917][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33802.064917][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [33802.255538][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33802.255538][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [33802.470219][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33802.470219][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [33802.625849][ T184] Backtrace: [33802.625849][ T184] Backtrace: [33802.702739][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33802.702739][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [33802.867146][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33802.867146][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [33803.013980][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33803.013980][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [33803.169603][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33803.169603][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [33803.318668][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33803.318668][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [33803.472107][ T184] [33803.472107][ T184] [33812.939054][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [33812.939054][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [33812.939054][ C0] (detected by 0, t=52511 jiffies, g=628817, q=48) [33812.939054][ C0] (detected by 0, t=52511 jiffies, g=628817, q=48) [33812.939054][ C0] rcu: All QSes seen, last rcu_sched kthread activity 19 (4303345540-4303345521), jiffies_till_next_fqs=1, root ->qsmask 0x0 [33812.939054][ C0] rcu: All QSes seen, last rcu_sched kthread activity 19 (4303345540-4303345521), jiffies_till_next_fqs=1, root ->qsmask 0x0 [34034.888097][ T184] INFO: task futex_requeue_p:11776 blocked for more than 1396 seconds. [34034.888097][ T184] INFO: task futex_requeue_p:11776 blocked for more than 1396 seconds. [34035.091906][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [34035.091906][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [34035.282516][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [34035.282516][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [34035.497205][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [34035.497205][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [34035.652834][ T184] Backtrace: [34035.652834][ T184] Backtrace: [34035.729724][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [34035.729724][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [34035.894141][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [34035.894141][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [34036.040965][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [34036.040965][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [34036.196589][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [34036.196589][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [34036.345655][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [34036.345655][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [34036.499095][ T184] [34036.499095][ T184] [34384.869774][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [34384.869774][ C0] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [34384.963346][ T184] INFO: task futex_requeue_p:11776 blocked for more than 1746 seconds. [34384.963346][ T184] INFO: task futex_requeue_p:11776 blocked for more than 1746 seconds. [34384.963054][ C0] (detected by 0, t=5252 jiffies, g=628973, q=3) [34384.963054][ C0] (detected by 0, t=5252 jiffies, g=628973, q=3) [34384.963054][ C0] rcu: All QSes seen, last rcu_sched kthread activity 5252 (4303488523-4303483271), jiffies_till_next_fqs=1, root ->qsmask 0x0 [34384.963054][ C0] rcu: All QSes seen, last rcu_sched kthread activity 5252 (4303488523-4303483271), jiffies_till_next_fqs=1, root ->qsmask 0x0 [34384.963054][ C0] rcu: rcu_sched kthread starved for 5252 jiffies! g628973 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [34384.963054][ C0] rcu: rcu_sched kthread starved for 5252 jiffies! g628973 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [34384.963054][ C0] rcu: Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior. [34384.963054][ C0] rcu: Unless rcu_sched kthread gets sufficient CPU time, OOM is now expected behavior. [34385.240135][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [34385.240135][ T184] Not tainted 5.8.0-rc4-JeR-00128-g42f82040ee66-dirty #195 [34384.963054][ C0] rcu: RCU grace-period kthread stack dump: [34384.963054][ C0] rcu: RCU grace-period kthread stack dump: [34384.963054][ C0] rcu_sched R running task 0 10 2 0x00000000 [34384.963054][ C0] rcu_sched R running task 0 10 2 0x00000000 [34384.963054][ C0] Backtrace: [34384.963054][ C0] Backtrace: [34385.724199][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [34385.724199][ T184] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [34384.963054][ C0] [34384.963054][ C0] [34387.118373][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [34387.118373][ T184] futex_requeue_p D 0 11776 11689 0x00000010 [34387.274009][ T184] Backtrace: [34387.274009][ T184] Backtrace: [34387.350896][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [34387.350896][ T184] [<00000000402b2b50>] check_preempt_curr+0xb8/0xd8 [34387.515262][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [34387.515262][ T184] [<00000000402e1f9c>] up_write+0x17c/0x188 [34387.662135][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [34387.662135][ T184] [<000000004040f914>] sys_mprotect+0x1f4/0x278 [34387.817760][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [34387.817760][ T184] [<000000004024e054>] syscall_exit+0x0/0x14 [34387.966825][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [34387.966825][ T184] [<000000004024d080>] intr_check_sig+0x0/0x3c [34388.120258][ T184] [34388.120258][ T184] --MP_/N41L.0PvKDRD_zJ3Pm8=AFc--