Linux soft lockup. I can't find out why my server is crashing .

Linux soft lockup. A ' soft lockup ' is defined as the kernel running in kernel mode for more than 20 seconds without giving other tasks a chance to run. 32, none Dec 12, 2024 · 文章浏览阅读4k次，点赞2次，收藏19次。本文详细介绍了Linux内核中的softlockup机制，用于检测和处理长时间占用CPU的任务导致的系统无响应。文章涵盖了softlockup与硬lockup的区别，检测和诊断方法，如ftrace和perf工具，以及常见的原因和解决策略。通过理解和应用这些知识，可以提升系统的稳定性和性能。 Much of the real interrupt handling work is done here. max_cstate=5 rcu_nocbs=0-15 to your kernel's boot options might fix the issue. 813909 Softlockup detector and hardlockup detector (aka nmi_watchdog) ¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. Now i'm trying to Debian 8. The kernel lockup watchdog is designed to identify when a CPU is potentially stuck, report it to the system log and Jan 4, 2018 · Further information Linux kernel documentation - lockup watchdogs What is a CPU Soft Lockup Difference between a CPU hard-lockup and a CPU soft-lockup Soft lockup messages from Linux kernel running in an SMP-enabled virtual machine Writing a Linux Kernel Module — Part 1: Introduction Simple kernel multithreading Kernel documentation - spinlocks Softlockup与hardlockup检测机制 (又名:nmi_watchdog) ¶ Linux中内核实现了一种用以检测系统发生softlockup和hardlockup的看门狗机制。 Softlockup是一种会引发系统在内核态中一直循环超过20秒（详见下面“实现”小节）导致其他任务没有机会得到运行的BUG。提到soft lockup，大家都不会陌生： BUG: soft lockup - CPU#3 stuck for 23s! [kworker/3:0:32]这个几乎和panic，oops并列，也是非常难以排查甚至比panic更麻烦。至少panic之后你可以去分析一个静态的尸体，然而s… Apr 9, 2025 · Many Linux kernels have a soft lockup watchdog thread, and report soft lockup messages if that watchdog thread does not get scheduled for more than 10 seconds. 1 CONFIG_PREEMPT_NONE 配置下的 soft lockup3. We have non-docker hosts running on this kernel with mdatp without issue. Anybody knows the last kernel without this problem? Jul 10, 2020 · Soft lockup happens when something goes into one CPU thread in order to get executed but doesn't get out after finishing the execution (happens only in kernel because you can disable Preemption or Interrupts only in kernel not in userspace. 12 WIndows Host Linux Guest soft lockup by scottgus1 » 24. May 9, 2021 · Same here, after update from 6 to 7 problem start, pass to 8 and problem persist i don't know what more to do, before was 0 problem. 10. 04) is a Zabbix agent, OpenSSH, and OpenZFS. games or Firefox with many tabs). What can I do to prevent this, or at least, make them appear less often ? See screen attached. journalctl -b -k logs of the last two lockups can be found here and here. This thread explains that adding processor. 032356] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [cat:153]“。这是lockup检测机制在起作用，lockup检测机制包括soft lockup detector和hard lockup detector。 Jan 16, 2010 · When this happened, I use 'kill' and 'kill -9', but it didn't work. The transition is complete and this forum is now closed to all new posts. And now thi Jan 22, 2025 · Understanding Bug Soft Lockup: When CPUs Get Stuck In the world of computing, a multitude of problems can arise that influence the performance and reliability of a system. 0 架构：arm64softlockup是指linux系统某个cpu长时间关闭抢占，通常是内核中的某个线程或进程在关键路径上长时间占用 CPU 而不释放，导致系统无法正常调度其他任务。它的后果可能包括系统性能下… Feb 10, 2022 · I recently installed kali as a vm on my windows laptop, it worked fine for about a week, but now having problems with loading, usually getting the message BUG: soft lockup - CPU#11 stuck for 22s , or similiar. 2. my system run zfs. Feb 13, 2025 · Learn the differences between soft and hard lockups in the Linux kernel, their causes, and how to detect and prevent system failures effectively. Various hardware issues, bugs or poorly written code in the kernel can result in CPUs becoming stuck and not available for process switching for extended periods of time. A help and support forum for Ubuntu Linux. 04 with error: "watchdog: BUG: soft lockup - CPU#11 stuck for 22s" followed by "NMI watchdog hard LOCKUP" Ask Question Asked 6 years, 11 months ago Modified 5 years, 8 months ago Apr 21, 2012 · I tried same kernel 5. 通过时间戳检查是否出现soft lockup。如果一个core长时间被一段执行流占据，虽然hrtimer总可以触发migration线程，叫它更新 Jan 21, 2019 · I did the Boot restart and started Fedora from the usb pen. I used 'pacman -Syu' every week， So，I don’t know after which update the failure occurred. For each CPU on the system, a watchdog process gets created. Dec 14, 2023 · If you can't recall what the linux keystrokes are; just grab a phone and search magic sysrq, the wikipedia article is usually near top & good enough, as it bypasses any GUI/UI allowing you to direct linux kernel directly. Can you search for “soft lockup” in journalctl output and paste 60 lines What does "kernel:NMI watchdog: BUG: soft lockup" followed by other errors mean? Ask Question Asked 10 years, 3 months ago Modified 5 years, 1 month ago Oct 24, 2025 · This document describes how to troubleshoot vCPU soft lockups. Only happens on docker hosts running 5. Oct 7, 2017 · My home server only stays up for a day or two before some process (changes every time) causes a soft lockup and the machine freezes, requiring a hard reset. 7 and Oracle Database Aliaksandr Paulik Dec 20 2019 — edited Jul 27 2020 介绍 Soft lockup 是指CPU被某内核代码占据，以至于无法执行其它进程。检测soft lockup的原理是给每个CPU分配一个定时执行的内核线程 [watchdog/x]，如果该线程在设定的期限内没有得到执行的话就意味着发生了soft lockup， [watchdog/x]是 SCHED_FIFO 实时进程，优先级为最高的99，拥有优先运行的特权。 Hard lockup Sep 21, 2022 · This is Windows 10 with VirtualBox installed and Ubuntu virtual machine with Apache server. Aug 21, 2023 · How long does thesis issue persist? Soft lockups are basically potential hangs in the kernel. Soft lockups can cause VMs to become unresponsive for short periods of time, disrupt SSH access to VMs, and trigger application timeouts or failover Sep 8, 2021 · 0 soft lockup is a Linux kernel bug, when some task can cause threads to loop and the kernel does not release activity to other processes. This issue also randomly happens without any consistent setup, so I'm at a deadlock as to what causes this. One such issue that developers and system administrators sometimes encounter is the bug soft lockup, a phenomenon that denotes a situation where the CPU becomes unresponsive, seemingly stuck in a processing loop. If you have not already done so, you can log into Ubuntu Discourse using the same Ubuntu Mar 6, 2014 · I was using fedora 39 and I had a smb share mounted all the time, and whenever the NIC link got down (due to power cut), it led to CPU soft lockup. This commonly happens if a device driver uses spinlocks improperly. I thought it was a fedora or a kernel issue. 40-1 (2021-05-28) x86_64 GNU/Linux after this Soft lockup occurs and does not recover until the system is rebooted. 27. Dec 27, 2014 · the Linux kernel caused the above soft-lockup as described by the above call-trace. Jan 31, 2019 · Linux soft lockup分析关键词： watchdog、soft lockup、percpu thread、lockdep 等。近日遇到一个soft lockup问题，打印类似“ [ 56. 30 to 6. A 'softlockup' is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds (see "Implementation" below for details), without giving other tasks a chance to run. This kernel thread is created with highest scheduling priority possible. I've observed that this issue is consistent whenever I play up Euro Truck Simulator 2 for a while, and I haven't tested if this issue is consistent with other heavy applications. And it's the same when backup or transfer get high io and soft lockup. I have developed a dummy kernel module with below code, with an intention to trigger softlockup: static int __init soft_lockup_init(void) { printk( Sep 14, 2022 · Hi all, Ubuntu server 22. Jul 24 14:03:21 coa2a-docker kernel: [34356. So this may not be a kernel issue after all. Soft lockups and RCU sched CPU stalls are detected where many CPUs are looping in a spinlock. 0-144-generic Ubuntu 22. 6. Jul 24, 2025 · linux-image-5. But I dint care much and switched to Arch, but now facing the same issue, even when switching to lts kernel. One way a soft lockup can occur is when the machine goes into a loop with interrupts turned off. A soft lockup is the symptom of a task or kernel thread using and not releasing a CPU for a longer period of time than allowed. Hw info: 32G RAM, AMD 3600x CPU, Quadro RTX 4000 GPU. 39 running on PPC. Oct 2023, 13:53 Start the VM from full normal shutdown, not save-state. The Linux kernel can act as a watchdog to detect both soft and hard lockups. Mar 24, 2017 · On my vCenter Server Appliance VM, I get "soft lockup - CPU## stuck for ##s!" message. For each online CPU on the system, a watchdog process gets created. I set /proc/sys/kernel/softlockup_panic to 1. I installed the latest MSI BIOS firmware update as of 12/2016. Insofern würde ich mal den nächsten Leap-Kernel abwarten, mit Tumbleweed funktioniert es ja. Currently i have very outdated version of Linux Mint. A hard lockup is encountered and then the kernel crashes in the end. 0 on my notebook Acer Travelmate 2200. The current stack trace is displayed upon detection and, by default, the system will stay locked up. 32 and saw this "BUG: soft lockup - CPU#1 stuck for 23s". A soft lockup occurs when a virtual machine (VM) instance's vCPU is unable to run a new task for more than 20 seconds. The task also does not allow any other task to execute on that particular CPU. A hard lockup is defined as a bug that causes the CPU to loop in kernel mode for more than 10 seconds without letting other interrupts have a chance to run. My guest machine became almost into an unusable state. 5. I am not able to log into the system, I think it's because all the cores are in a "soft lockup" state, and hence cannot trigger a kernel dump from shell prompt. Booting the system with maxcpus=1 or disabling the The soft and hard lockup detectors are built on top of the hrtimer and perf subsystems, respectively. When running in a virtual machine, this might instead indicate high levels of overcommitment (especially memory overcommitment) or other Any message in /var/log/messages referencing soft lockups like these: kernel: BUG: soft lockup - CPU#0 stuck for 10s! [bond1:3307] or kernel: BUG: soft lockup - CPU#0 stuck for 67s! [bond1:3307] Not necessarily specific to CPU#0 or process bond1 The system does not boot up (or just very slowly), I only see many messages "BUG: soft lockup". run: $ sudo apt-get upgrade OR $ sudo apt upgrade Install kernel updates on a Ubuntu LTS server Type the following apt-get command: $ sudo apt-get dist-upgrade Jan 22, 2025 · On VM at the terminal or in the /var/log/message file, the following message appears: kernel: BUG: soft lockup - CPU#Y stuck for Xs! where Y is one of the CPU cores and X is an amount of time. 13. Here’s the logs from a recent crash that happened today: Feb 24 08:00:28 cdn2-new kernel: watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [nginx:435762] Feb 24 08:00:30 cdn2 Jul 3, 2023 · It is seen on some Oracle Linux 7 virtual machine running on Oracle VM Server gut soft lockup call traces on vCPU0 , However it is weird that the vCPU#0 is in idle when it gets stucked. When this is happening, most of the time I have to restart my vCSA VM. A periodic hrtimer runs to generate interrupts and kick the watchdog task. Oct 14, 2016 · I have one issue, at customer machine the user space process is hogging up the processor (soft lockup)along with 2 kernel process and dump stack trace showing RIP at _ticket_spin_lock in all 3 proc "BUG: soft lockup" というメッセージが多数表示されるだけです。 maxcpus=1 でシステムを起動するか、BIOS で FiberHBA カードのスロットを無効にすると、システムが起動します。 modprobe qla2xxx が原因でのソフトロックアップ無限ループを引き起こします。 In linux kernel since version 5. Do you have any clue what this could be? I read about the problem. The server would randomly freeze, sometimes after 1-2 weeks of use (with suspend in between). Update your BIOS and boot with the newest 2021-09-01 archlinux install iso image a few times and see if you get the same issue. I tried 'systemctl restart nfs-server',it didn‘t work. 分析背景3. This can cause symptoms that range from a temporarily unresponsive system to a total system lockup. updating the kernel seems like a only workaround. Softlockup detector and hardlockup detector (aka nmi_watchdog) The Linux kernel can act as a watchdog to detect both soft and hard lockups. 对于soft lockup发生在ipi请求过程中的案例，实际上是有一个固定的步骤进行排查的，一般都是由于发送ipi请求的一方发送请求后，一直在忙等待请求函数的执行完成，而执行CPU一直没有正常执行该函数导致了soft lockup。对于这类问题首先需要找到导致soft lockup的CPU上的堆栈，根据堆栈信息查找到函数的 Oct 1, 2025 · A soft lockup is the symptom of a task or kernel thread using and not releasing a CPU for a longer period of time than allowed. Jun 24, 2022 · Solved: kernel:NMI watchdog: BUG: soft lockup – CPU#20 stuck for 22s! [: ? By Saket Jain Published June 24, 2022 Linux/Unix Aug 31, 2019 · [SOLVED] BUG Soft lockup stall - Shutdown takes long time Forum rules There are no such things as "stupid" questions. Early in the transition to SMP, there were only 'bottom halves' (BHs), which didn't take advantage of multiple CPUs. Softlockup detector and hardlockup detector (aka nmi_watchdog) ¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. 2 with new kernel. Sometimes they can be environment related (e. This Apr 8, 2025 · 目录1. 前言2. [ 435. #1 by StefanQ » 2015-08-18 13:46 Hi, Im beginer of linux systems. May 18, 2023 · On two servers running Rocky Linux 9. 0-144. Hello, Unregistered. 1 is having issues freezing repeatedly with CPU softlocking. I have no clue what to look at next, any help is greatly appreciated. It's the responsibility of the kernel programmer to call for example schedule () or a similar procedure Dec 14, 2024 · The server goes into a hangup state with soft lockup occurrences Solution Unverified - Updated December 14 2024 at 12:57 AM - English Apr 19, 2024 · watchdog: BUG: soft lockup Forum rules There are no such things as "stupid" questions. It works fine but I prefer keeping system updated. 5-arch1-1 amd-ucode:20200817. With Fault Tolerance turned on, the Linux Kernel vmw_vmci driver for the VMCI device ends up in a busy loop, causing the Virtual Machine to enter a soft lockup if the VMCI device is used. Each time different processor. Anyone needing support for Ubuntu or the official flavours should seek help at Ubuntu Discourse. Last edited by solskog (2021-09-05 01:22:26) Jan 9, 2021 · My Ubuntu 20. Often CPU hangs on the Ubuntu virtual machine, taking up to 50% host CPU usage with no response at all, w Apr 24, 2024 · I am using vanilla Linux kernel v6. Jul 23, 2024 · The VMCI DMA datagrams feature is incompatible with Fault Tolerance. Some people take this symptom as their definition of a hard lockup but beware that there is a situation that the kernel calls a soft lockup that exhibits the same symptom. I can enter through recovery mode, but then it runs without drivers. Chapter 11. It may or may not help to post system log messages that preceded the soft lockup, or to run hardware diagnostics. 054790] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! After a few minutes the system becomes completely unresponsive until I physically reboot the system. Unless this situation is caused by external factors (see Additional Information section below), this is usually indicating a bug. Soft lockups on v6. Feb 24, 2024 · Hello, I encountered an issue recently on my server. This is the message: kernel:watchdog: BUG: soft lockup - CPU#1 Virtual machine guest suffers multiple soft lockups at the same time We are experiencing kernel panic due to softlockup. After a random period ranging from a few minutes to a couple of hours, two CPUs completely freeze making the system unusable. 13 with another tiger-lake CPU and I don't have any issue with CPU soft-lock/hard-lock nor irq_exit_rcu interrupt. e. Soft lockups can cause VMs to become unresponsive for short periods of time, disrupt SSH access to VMs, and trigger application timeouts or failover May 29, 2013 · There the "soft lockup" is more seldom and does not prevent the system to boot up. So far, I haven't found any clue as to wha Oct 27, 2025 · A "soft lockup" message is one of the most common seen warning messages in Linux system: The watchdog process is scheduled on certain interval to get timestamp and update it into its CPU data structure. However if you think your question is a bit stupid, then this is the right place for you to post it. The traces that the kernel prints when the BUG happens always show functions having to do with pages. The principle of detecting soft lockup is to assign a timed execution kernel thread [watchdog/x] to each CPU. My computer and software: AMD 3970X,Gigabyte TRX40 AORUS 64G RAM kernel:5. KALI FIX: watchdog: bug: soft lockup - cpu#1 stuck for 22s! Haggai Odanga 2. 15. The watchdog daemon will send an non maskable interrupt (NMI) to all CPUs in the system who in turn print the stack traces of their currently running tasks. If not possible, close the Virtualbox window for the VM with the Power Off option set. Since then it has been a disaster. Shortly after we switched from wind-up computers made of match-sticks and snot, we abandoned this limitation and switched to 'softirqs'. Aug 26, 2020 · 事实上，死循环并不一定会导致soft lockup，比如 Linux 内核生命周期内的0号进程就是一个死循环，此外很多的内核线程都是死循环。 Jul 8, 2021 · Linux host 5. 8. Feb 1, 2018 · Soft lockup means that the CPU is occupied by the kernel code so that other processes cannot be executed. This is an update about the transition of the forums to Ubuntu Discourse. Feb 10, 2019 · A 'soft lockup' is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds, without giving other tasks a chance to run. 2 CONFIG_PREEMPT 配置下的 soft l Aug 20, 2013 · I am seeing a Soft Lockup issue with Linux 2. 04 Microsoft Defender for Endpoint Linux (mdatp, wdavdaemon) Docker After latest kernel patch I see constant freezes on servers with mdatp and docker running in our environment. Depending on module parameters it could emulate soft or hard lockup, "hung task", or locking arbitrary lock for a long time. On a physical host, a soft lockup message generally indicates a kernel bug or hardware bug. 更新hrtimer；2. 1 什么是 soft lockup ?3. Kernel dumps a stack trace for the hanging kernel thread, and this ends up in the journal. 5 on qemu. 084576] watchdog: BUG: soft lockup - CPU#6 stuck for 23s! [VM Thread:405 この記事では、ソフトロックアップの技術的な理由、ウォッチドッグプロセスが CPU のソフトロックアップを検出する方法、およびスピンロックの定義について説明します。 I was testing soft lockup recovery procedure of Linux Kernel. 04 server has started complaining: [138070. And I created a Kernel module as described in the link Softlockup detector and hardlockup detector (aka nmi_watchdog) ¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. Run until you see the problem happen, then shut down the VM from within the VM's OS if possible. After updating the UEFI firmware and doing a few more boots I have the feeling that the "soft lockup" happens less often (I think like 40% of the boots). 0-7-amd64 #1 SMP Debian 5. . linux内核版本：5. 784999] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs m Apr 11, 2022 · Just come across this after struggling with these soft lockups for a long time. Jul 19, 2021 · If you Google "ryzen linux soft lockup" there are hundreds of threads about the system freezing and requiring a reboot, but not a single thread mentioned intermittent network connectivity as a symptom. 2. I caught the following in syslog : Sep 13 04:17:55 marcus-server kernel: [33687. Jan 23, 2017 · On MSI GP72 6QF Leopard Pro, I have installed Ubuntu 16. 0. For long and complicated questions use the other forums in the support section. An NMI perf event is generated every "watchdog_thresh" (compile-time initialized to 10 and Sep 23, 2015 · How to fix "BUG: soft lockup - CPU#0 stuck for 17163091968s"? Ask Question Asked 13 years, 11 months ago Modified 1 year ago I've seen a few bug reports and questions (on stackexchange and elsewhere) regarding a nagging "BUG: soft lockup - CPU#<n> stuck for <dt>s!". Keeping kernel panic parameters disabled in virtualized environments | Managing, monitoring, and updating the kernel | Red Hat Enterprise Linux | 8 | Red Hat DocumentationA soft lockup is a situation usually caused by a bug, when a task is executing in kernel space on a CPU without rescheduling. Enabling Nvidia proprietary Jan 1, 2025 · At random times, my system freezes up whenever I start a heavy process (i. kernel: NMI watchdog: BUG: soft lockup - CPU#X stuck for 22s! [xxxx:xxx] Soft lockup warnings in terminal, followed by a system freeze Every couple days my system starts spitting out soft lockup warnings to the terminal like kernel: [151846. A ‘softlockup’ is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds (see “Implementation” below for details), without giving other tasks a chance to run. I am new to Linux Kernel stuff and hence I don't know where to start looking. As a Oct 24, 2025 · This document describes how to troubleshoot vCPU soft lockups. 1. I've updated to hwe kernel, rebooted several times, and it still happens. Macs can have failing hardware just as easily as linux. Mar 29, 2020 · I have two database nodes, and this is one of them, yesterday the other one had a system soft lock problem and i unable to solve the soft lock problem in a short time. network mounts to unresponsive servers), but they can also be kernel regressions. If an user-space process had caused the soft-lockup, a line identifying the process by its pid would logged, followed by the contents of various CPU-registers without a call-trace of any sorts. Aug 5, 2020 · I tried every solutions I found on google I can't find out why my server is crashing Aug 5 17:11:08 kernel: [ 2300. A direct consequence of this is that, in principle, they should work in any architecture where these subsystems are present. Soft Lockup, CPU stuck for. It has a lot of "watchdog: BUG: soft lockup - CPU#4 stuck for 45s! [worker:131043]" messages. 04. 784987] watchdog: BUG: soft lockup - CPU#53 stuck for 22s! [kswapd4:543] [138070. 37K subscribers Subscribe Mar 10, 2024 · Watchdog: BUG: soft lockup - cpu#3 stuck for 26s! [systemd-udevd:1207] by HereAreWe128 » Sun Mar 10, 2024 12:26 am Im trying to load mint in "live" mode (its the one where you load it through usb) and it freezes at a console screen with the following My pc restarts after freezing with: Softlockup detector and hardlockup detector (aka nmi_watchdog) ¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. 2 各种抢占配置下的 soft lockup3. Oct 24, 2023 · Re: Vbox 7. Most soft lockups are caused by bugs in application software. 940577] BUG: soft lockup - CPU#0 stuck for Environment Red Hat Enterprise Linux （任何版本）虚拟机 Red Hat Satellite 6 [Discovery provisioning] Mar 11, 2020 · It just says "watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd-udevd:225]" I tried adding "nouveau. Alternatively, the kernel Jan 22, 2025 · Linux系统中CPU软锁定表明CPU长时间无响应，可能因驱动、硬件或内核bug引起。解决方案包括更新系统驱动、监控硬件和分析日志，预防措施有性能监控、硬件检测和系统优化。 Jul 27, 2020 · kernel:watchdog: BUG: soft lockup - CPU#5 stuck for 22s! [swapper/5:0], OEL 7. 触发migration线程更新soft lockup的时间戳；3. The issue seems to have started in the last week, all packages are up to date. 436241] watchdog Feb 20, 2025 · A soft lockup is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds without giving other tasks a chance to run. Aug 31, 2007 · From time to time my host machine crashes. Oct 16, 2020 · 2、内核软死锁（soft lockup）bug原因分析 Soft lockup名称解释：所谓，soft lockup就是说，这个bug没有让系统彻底死机，但是若干个进程（或者kernel thread）被锁死在了某个状态（一般在内核区域），很多情况下这个是由于内核锁的使用的问题。 Linux内核对于每一个cpu都有一个监控进程，在技术界这个叫做 Jun 26, 2024 · Würde eigentlich empfehlen, auf der Mailingliste von linux-cifs nachzufragen, aber da SuSE wahrscheinlich den Kernel patcht, bin ich mir nicht sicher, ob die linux-cifs Leute was dazu sagen können. Not much to add except: this matches my experience. 1, I upgraded to 9. Oct 26, 2018 · Random freezes on Ubuntu 18. Logs show messages like (examples from different sources): BUG: soft lockup - Mar 16, 2012 · Yesterday I upgraded Virtualbox from 6. Since fresh install, the Ubuntu shutdown was halting with the error: NMI watchdog: BUG: soft lockup - CPU#5 stuck for 22s! [plymouthd:9203] I'd get different CPU number with each shutdown. After it appears, the computer slowly becomes unresponsive, and eventually hangs completely. 1 (release Date: 2019-05-05) This builds the "test_lockup" module that helps to make sure that watchdogs and lockup detectors are working properly. Thanks in advance Last edited by LockBot on Wed Dec 28, 2022 12:16 pm, edited 1 time in total. 7a30af1-1 nfs-utils:2. Stick to easy to-the-point questions that you feel people can answer fast. modeset=0" in the GNU GRUB, but the problem persists. The technical reason behind a soft lock involves CPU interrupts and nmiwatchdog. Also, I have secure boot disabled and C-step disabled. Jul 5, 2021 · You need to diagnose the problem more deeply. g. Only way to get updated system now is install new one, and here i have a problem. 1-1 Thanks！ Last edited by wtq119 (2020-09 Server hangs or becomes unresponsive and has to be rebooted. The only solution is to restart the server, it works fine again for a while and then same story. Apr 28, 2024 · 代码分析 Linux内核在每个core上启动一个高精度定时器 (hrtimer)支持soft lockup，hrtimer定时到期的处理函数的主要工作有：1. The technical reason behind a soft lock involves CPU interrupts and nmi-watchdog. so I restart it . I posted as a comment because I don't have a complete answer for this. soft lockup 机制3. Aug 12, 2016 · A soft lockup is the symptom of a task or kernel thread using and not releasing a CPU for a period of time. After a lot of [ok] checks it got stuck in [ok] Started GNOME Display Manager and the following message started to repeat : watchdog: BUG : soft lockup #CPU1 stuck for 23s! Sep 11, 2013 · How would be the correct way to prevent a soft lockup/unresponsiveness in a long running while loop in a C program? (dmesg is reporting a soft lockup) Pseudo code is like this: while( worktodo ). May 8, 2024 · watchdog: BUG: soft lockup - CPU#14 stuck for 2917s! [systemd:1] Currently all I have on the system (other than base Ubuntu 22. sfb65 pbbyxqltm bgra uym2n3q lk4 ojxbrdz 4dthc 2hk i9 k1