Linux soft lockup

localdomain Icon name: computer-vm Chassis: vm Machine ID kernel:NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s. 32 from PSP 03. I am not sure what caused it, as seems kernel tained by flag G is not a problem ? 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. I have a dedicated server with with VMWare ESXi-6. [ 1121. Symptom When the database seems to slow down, a quick running utility doesn’t finish, or a shutdown fails for no obvious reason then go look in the OS logs for messages about “soft lockup. org> ; Reported by: Serhiy Makarenko <serhiy. regarding linux-image-4. The live environment successfully booted, and successfully installed Arch on SD. x86_64) installed. With hope for a solution. 9rc3), a powered 7 port USB hub and 5 Prolific. 2 hasn't gone so well. Inspiron 7786 - Hard and soft lockup on reload/shutdown. 26-0ubuntu0. 0-8-amd64: soft lockup after screen does a sleep cycle (dpms off then on) Today i had some time to investigate this issue further and i made some interesting observations: 1. While running the application for long time, I am getting "BUG: soft lockup - CPU#0 stuck for 61s! " errors from kernel and CPU stucks. I am running Antergos Linux (Arch Linux) now, but for the short time I used Windows, there were no problems. and then I've seen this on the SSH: kernel:watchdog: BUG: soft lockup - CPU#3 stuck for 21s! [java:12399] What does this tell me? OK it is clear what it does tell me, but how do I BUG: soft lockup - CPU#1 stuck for 1024s! From: Fengguang Wu Date: Sun Sep 09 2012 - 03:59:40 EST Next message: Geert Uytterhoeven: "Re: [PATCH 4/4] xtensa: Setup CROSS_COMPILE at the top" The issue seemed to be caused by the Nouveau driver. 定位soft lockup异常. FYI: I have my Linux distros installed on an external USB HDD, and I added "rootdelay=10" to the opensuse kernel append. Changing the driver under Control Panel > Driver Manager from the Nouveau 1:1. Recently, some Linux VMs got an abruptly significant increase in CPU speed,then system hung. 0-20181103001-standard-customized installed which runs 8 small virtual machines. jones_supa writes As anticipated, Linus Torvalds officially released Linux 3. The lockup doesn't occure always after starting usb_test. In rare cases i was able to run the program without lockup. 2 solved the CPU stall issue and the long shutdown times issue. This kernel thread is created with highest scheduling priority possible. 2016-10-31 20:34:23 UTC. Here is an example output: Comment. 30-1 Severity: critical Tags: patch upstream Justification: causes serious data loss Hello, the igb/e1000e driver causes a soft lockup when doing stats updates. 2) kernel command-line is used: rcu-nocbs=0-15 (depending on the CPU) This appears to help, but is not a guaranteed fix. kernel. Last edited by freswa (frederik) - Sunday, 13 September 2020, 15:48 GMT. In this case it may be caused by a bug in the kernel when the CPU wakes up from an extended idle period. 15-2 to the proprietary NVidia driver 430. On a physical host, a soft lockup message generally indicates a kernel bug or hardware bug. 06 for my AM3505 based board. patreon. Thread starter Asg. 48 softlock_panic(struct notifier_block *this, unsigned long event, void *ptr) Date: Sat, 25 Jul 2009 18:11:52 -0700 From: Lee Howard <faxguy@howardsilvan. 100003] Modules linked in: snd_hda_codec_analog gpio_ich snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc ppdev snd_seq_midi snd_seq_midi_event snd_rawmidi microcode nvidia(POF) snd_seq psmouse rfcomm bnep bluetooth serio_raw lpc_ich snd_seq Softlockup detector and hardlockup detector (aka nmi_watchdog)¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. The Linux system crashes with soft lockup errors with the lin_tape driver. Stack Exchange Network. linux 内核Lockup机制浅析 概念说明 Linux * [syzbot] riscv/fixes test error: BUG: soft lockup in corrupted @ 2021-09-24 8:58 syzbot 0 siblings, 0 replies; only message in thread From: syzbot @ 2021-09-24 8:58 UTC (permalink / raw) To: davem, dsahern, kuba, linux-kernel, netdev, syzkaller-bugs, yoshfuji Hello, syzbot found the following issue on: HEAD commit: 7d2a07b76933 Linux 5. (too old to reply) Stefan Wahren. I am using Linux 2. I inspired by this issue [1] i build up a slightly modified setup with a. 00. 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。. 0 and later Linux x86 Linux x86-64 Symptoms The CentOS/RHEL kernel has a default softlockup threshold of 10 seconds. Initial boot from microSD failed as systemd timed out looking for ESP, along with the same soft lockup warning. 8ghz quad core, 6G RAM, NVIDIA GeForce 6150SE nForce 430 (with the kmod-nvidia-173xx drivers) The app fires up, and then freezes. Task Type. - removed fallback to soft events if no PMU exists for hard events V3: - comment cleanups - drop support for older softlockup code - per_cpu cleanups - completely remove software clock base hardlockup detector - use per_cpu masking on hard/soft lockup detection - #ifdef cleanups - rename config option NMI_WATCHDOG to LOCKUP_DETECTOR BUG: soft lockup - CPU#1 stuck for 1024s! From: Fengguang Wu Date: Sun Sep 09 2012 - 03:59:40 EST Next message: Geert Uytterhoeven: "Re: [PATCH 4/4] xtensa: Setup CROSS_COMPILE at the top" Softlockup detector and hardlockup detector (aka nmi_watchdog)¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. User space processes should not be able to soft lockup a CPU. Permalink. 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. Do not run on head node and other nodes at the same time. I am desperately trying to make an otherwise perfectly functional A64+ usable in my application, but I've been sparring with the "soft lockup" issue for ages. For debian-based Linux VMs, its possibly related to Linux 3. * [syzbot] BUG: soft lockup in call_usermodehelper_exec_async @ 2021-09-17 7:30 syzbot 2021-09-17 7:37 ` Dmitry Vyukov 0 siblings, 1 reply; 2+ messages in thread From: syzbot @ 2021-09-17 7:30 UTC (permalink / raw) To: akpm, linux-kernel, linux-mm, syzkaller-bugs Hello, syzbot found the following issue on: HEAD commit: 8cae8cd89f05 seq_file 48 softlock_panic(struct notifier_block *this, unsigned long event, void *ptr) [Kernel-packages] [Bug 338047] Re: soft lockup - CPU#0 stuck for 11s! [clurgmgrd:4587] Christian Ehrhardt Wed, 22 Sep 2021 22:50:49 -0700 This leads pass_counter to decrease and finally reach zero. A low priority thread updates a timestamp every second. An issue was discovered in the Linux kernel before 5. This has happened on multiple systems now, often more than once. Description. 5 for my company. 6. 0 on my notebook Acer Travelmate 2200. This process “wakes up” once per second, gets the current time stamp for the CPU it is. BUG: soft lockup - CPU#0 stuck for 10s! •Soft lockups are situations in which the kernel's scheduler subsystem has not been given a chance to perform its job for more than 10 seconds; they can be caused by defects in the kernel, by hardware issues or by extremely high workloads. Last edited by lminty on Sun Sep 01, 2019 6:09 pm, edited 2 times in total. 1810. 0-5-amd64 Version: 4. When running in a virtual machine, this might instead indicate high levels of overcommitment (especially memory overcommitment) or other virtualization overheads. The first batch is on all nodes except head node. PL2303 USB to serial convertors. 0. It works fine but I prefer keeping system updated. This patch also provides support for uart init and exit function calls if present. 1 Running on vSphere 5. The messages log with the lockup is attached below. 1. The new version is now out there, though that nasty lockup issue has still yet to be resolved. * [syzbot] BUG: soft lockup in call_usermodehelper_exec_async @ 2021-09-17 7:30 syzbot 2021-09-17 7:37 ` Dmitry Vyukov 0 siblings, 1 reply; 2+ messages in thread From: syzbot @ 2021-09-17 7:30 UTC (permalink / raw) To: akpm, linux-kernel, linux-mm, syzkaller-bugs Hello, syzbot found the following issue on: HEAD commit: 8cae8cd89f05 seq_file Hi, Im beginer of linux systems. c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184. Kernel. 0003201: BUG: soft lockup - CPU#11 stuck for 10s! Description. It optionally fixes the maximum amount of CPU a domain will be able to consume, even if the host system has idle CPU cycles. It * Re: [syzbot] BUG: soft lockup in do_wp_page (4) 2021-03-18 19:34 ` Dmitry Vyukov @ 2021-03-25 18:20 ` Will Deacon 2021-03-25 18:34 ` Dmitry Vyukov 0 siblings, 1 reply; 9+ messages in thread From: Will Deacon @ 2021-03-25 18:20 UTC (permalink / raw) To: Dmitry Vyukov Cc: syzbot, kernel-team, Andrew Morton, LKML, Linux-MM, syzkaller-bugs, Linux Re: Ryzen linux kernel bug 196683 - Random Soft Lockup. This seems to starve the Dom0 CPU on servers that Re: "CPU Soft lockup" kernel panic message I am able to boot Fedora and Ubuntu from the same drive without issues. CentOS 7 - kernel: BUG: soft lockup - CPU#3 stuck for 23s! [rcuos/1:19] I have CentOS running as a Virtual Machine on ESXi 5. CPU#3 soft lockup on Linux OS. g. 04 Dualboot Fresh Install - posted in Linux & Unix: Hello, I am an advanced user of Linux and this has been the most troubling issue I have ever faced usb: dwc2: NMI watchdog: BUG: soft lockup - CPU#0 stuck for 146s. I am supremely enjoying LinuxMint. I am running some application which uses major interfaces like USB, DSS, VPFE, DDR, NAND, I2C, EMAC, UART etc. This can sometimes be too low if the system is very busy with I/O. Applies to: Linux OS - Version Oracle Linux 5. 5. Sometimes, thete is no reported crash log at all. 01. I surmise CentOS 7 - kernel: BUG: soft lockup - CPU#3 stuck for 23s! [rcuos/1:19] I have CentOS running as a Virtual Machine on ESXi 5. 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. This can be taken as trigger point to run this UART_BT_WA. 651205] BUG: soft lockup - CPU#8 stuck for SAP Knowledge Base Article - Preview 2352205 - Suse Linux 11 BUG: soft lockup - CPU#8 stuck for 22s Unix & Linux: BUG: soft lockup - CPU# stuck for x secondsHelpful? Please support me on Patreon: https://www. org Anywhere from once every two weeks to two times daily I have to power-cycle a system due to a CPU getting this "soft lockup". Page 1 of 2 - Soft Lockup on New Ubuntu 18. What you describe is the Kernel Magic where the: 1) kernel is configured: CONFIG_RCU_NOCB_CPU=y. I'm running Fedora Core 10, latest patchlevel of pretty much everything. 14 git 39. 9. For instance, when using the ledtrig-netdev kernel module to visualize network activity via LEDs. Yesterday, 01:51 PM. AMD have told me that a PSU which will deliver 12V at 0A is required. debian. There is a soft CPU lockup that occurs and renders the VM inoperable. 14 git BUG: soft lockup - CPU#0 stuck for 10s! •Soft lockups are situations in which the kernel's scheduler subsystem has not been given a chance to perform its job for more than 10 seconds; they can be caused by defects in the kernel, by hardware issues or by extremely high workloads. This can be reproduced with: #include <linux/compiler. org Bugzilla – Bug 10396 BUG: soft lockup - CPU#0 stuck for 61s! [modprobe:2096] Last modified: 2013-04-09 06:23:26 UTC 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. I've been having ongoing issues with Rancher using the default VM. 1/11. CPU temperature is slightly higher than before (I assume it does less of core parking or may be some other thing is affected). ” BUG: soft lockup - CPU#0 stuck for 22s! Package: src:linux ; Maintainer for src:linux is Debian Kernel Team <debian-kernel@lists. The following Redhat FS#67649 - [linux] CPU soft lockup in smp_call_function_many_cond during boot with SMP. Here, -c is the cap. Navigate to your HDInsight cluster from Azure portal. How is a soft lockup detected ? The Linux kernel creates a watchdog process for each CPU in the system. 1) Last updated on MAY 22, 2020. 3. The current stack trace is displayed upon detection and, by default, the system will stay locked up. The exact format of these messages vary from kernel to kernel, and might be accompanied by a kernel stack backtrace. Date: Sat, 25 Jul 2009 18:11:52 -0700 From: Lee Howard <faxguy@howardsilvan. I have a Linux machine that is giving a lot of "BUG: soft lockup cpu# [y] stuck for [x]s!" errors. I recently suspended my laptop by closing the lid! Upon return the problem started. and then I've seen this on the SSH: kernel:watchdog: BUG: soft lockup - CPU#3 stuck for 21s! [java:12399] What does this tell me? OK it is clear what it does tell me, but how do I Re: Ryzen linux kernel bug 196683 - Random Soft Lockup Just built the kernel with CONFIG_RCU_NOCB_CPU=y, and running it OK so far (kernel boot parameter: rcu_nocbs=0-15). * [syzbot] riscv/fixes test error: BUG: soft lockup in corrupted @ 2021-09-24 8:58 syzbot 0 siblings, 0 replies; only message in thread From: syzbot @ 2021-09-24 8:58 UTC (permalink / raw) To: davem, dsahern, kuba, linux-kernel, netdev, syzkaller-bugs, yoshfuji Hello, syzbot found the following issue on: HEAD commit: 7d2a07b76933 Linux 5. 5 is configured with a Data Domain Virtual Tape Library, which emulates an IBM 3584 L32 library with LTO4 tape drives. [oracle:14422] dcplnx21328989 kernel: [22333600. 18. Opened by Frantisek Sumsal (mrc0mmand) - Thursday, 20 August 2020, 10:14 GMT. After running fine for a couple of hours the server suddenly timed out on ssh, bind etc. Below are some of the crash: Whenever I try to boot any non-Ubuntu/Debian OS, the boot verbose always hangs at watchdog detected hard (at times soft) lockup on CPU<number>. h> #include <linux/moduleparam. This timestamp is checked during a timer interrupt to see if it was updated within the last ten A kernel lockup may come from a bunch of reasons. Since a while we experience quite often that our HP nodes used as storage pool nodes die with "BUG: soft lockup - CPU#<n> stuck" errors. Mint will shut down with the above message adding that it cannot forward the msg because it cannot connect. The Linux kernel includes code that detects these kinds of soft lockup errors. This seems to be a problem with the laptop as the same ISO (same USB) works on any and every other device. 110 on Linux, kernel soft lockups. Now i'm trying to Debian 8. el7. /proc/swaps or /proc/locks) then that process locks up. 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. localdomain Icon name: computer-vm Chassis: vm Machine ID Softlockup detector and hardlockup detector (aka nmi_watchdog)¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. This commonly happens if a device driver uses spinlocks improperly. com> To: linux-kernel@vger. For each online CPU on the system, a watchdog process gets created. 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. 04. The effect is that the system is basically completely When running a Linux kernel in a symmetric multiprocessing (SMP) enabled virtual machine, messages similar to BUG: soft lockup detected on CPU#1! are written to the message log file. 987994] BTRFS info (device sdc5): disk space caching is enabled Page 1 of 2 - Soft Lockup on New Ubuntu 18. The RHEL Soft Lockup defect can cause huge CPU performance problems for DB2 and BigSQL. 10. Linux CPU soft lockup, kernel tained, system hung - Unix & Linux Stack Exchange. Bug#991546: linux-image-5. 引起soft lockup的原因一般是死循环或者死锁, 死循环可以通过栈回溯找到问题点;死锁问题需要打开内核的lockdep功能。 打开内核的lockdep功能可以参考《Linux死锁检测-Lockdep》。 下面看一个while(1)引起的soft lockup异常分析: I am using Linux 2. Go to script actions. ZabbixでIO系のエラーが頻発していたので確認したところ、kernel: BUG: soft lockup - CPU#x というエラーがでていたので対処した時のメモです。メモリはある程度のオーバーヘッドでパフォーマンスの違いが見えやすいから少し神経質になるけど、CPUはすべてのVMが忙しく動いているわけではない Posts: 1. 100003] BUG: soft lockup - CPU#1 stuck for 22s! [irqbalance:972] Feb 10 02:58:09 shannon kernel: [44668. 2. For each CPU on the system, a watchdog process gets created. 16-rc1. Searching around, it's possible that this is a GRUB issue. com/roelvandepaarWith thanks & praise to The CentOS/RHEL kernel has a default softlockup threshold of 10 seconds. 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. After it "unfreezes", I can navigate the menus (barely) and I've gotten the program * [syzbot] riscv/fixes test error: BUG: soft lockup in corrupted @ 2021-09-24 8:58 syzbot 0 siblings, 0 replies; only message in thread From: syzbot @ 2021-09-24 8:58 UTC (permalink / raw) To: davem, dsahern, kuba, linux-kernel, netdev, syzkaller-bugs, yoshfuji Hello, syzbot found the following issue on: HEAD commit: 7d2a07b76933 Linux 5. 14 git I fired up Arch Linux Archive and excavated an old archiso (201905, I believe) as Arch used to work on this device. makarenko@me. 983975] BTRFS: device fsid 8cc641f9-563a-4d62-9157-9503156ce62c devid 1 transid 4 /dev/sdc5 [ 1121. Summary. 65-3+deb9u2 Severity: normal Hey. watchdog: BUG: soft lockup - CPU#53 stuck for 22s! [kswapd4:543] My Ubuntu 20. Some soft lockups can render the system unusable by permanently preempting all other threads. Static hostname: localhost. Attached to Project: Arch Linux. Select Submit New and enter the input as follows. NMI soft lockup barfing at us because a task has been blocked for too long. Discussion CPU#3 soft lockup on Linux OS Author Date within 1 day 3 days 1 week 2 weeks 1 month 2 months 6 months 1 year of Examples: Monday, today, last week, Mar 26, 3/26/04 An IBM Spectrum Protect server running on RedHat 6. com> Summary. The startup is not as smooth and the LT will not shut off. The following Redhat Re: Soft lockup at boot Reply #2 – 26 May 2021, 20:05:16 I have many random soft lockups at boot, exactly after the message "waiting for udev uevents to be processed". #1. 18 Released, Lockup Bug Still Present 106. The technical reason behind a soft lock involves CPU interrupts and nmi-watchdog. Posted by samzenpus on Monday December 08, 2014 @05:13PM from the check-it-out dept. 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. An IBM Spectrum Protect server running on RedHat 6. Below is the message that show up when CPU soft lockup. Workaround backups the register configuration, does soft reset of UART using BIT-0 of PRCC_K_SOFTRST_SET/CLEAR registers and restores the registers. h CPU#3 soft lockup on Linux OS. HI all, I recently had the feeling that my server had some problems. Execute the script action in two batches. I have an annoying problem. arch/x86/kvm/svm/sev. Even my ssh session stuck for a few seconds. z3fold_alloc makes me think it is running out of memory. Systems; Start date Jan 14, 2021 BUG: soft lockup - CPU#63 stuck for 22s! [bridge:31481 I encountered soft lockup when executing 'xfstests btrfs/042' on 3. It worked well previously but the shift to 11. Below is the message that show up when CPU soft lockup happened,then system hung in a short time. The second batch is on head node. I can run Linux from a USB stick, but, when I try to reload or shut down the laptop, I get messages like these: If I keep it on (until my patience lasts, lol), I will get multiple messages like the second line (with varying numbers), and the only way to turn the computer off is by long 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 Oracle Linux: VMware Guest VM: "BUG: soft lockup detected on CPU#N" Entry in /var/log/messages Log (Doc ID 2448184. It happens both with and without "noapic". This means that you claim that the problem has been dealt with. 04 server has started complaining: Some things are still working fine, but it seems as soon as a process needs stuff in /proc (e. 0-3-amd64: Soft lockup of igb/e1000e driver at stats update to be marked as done. Very often when I boot to my new Acer Aspire 3 A315-41 laptop, it hangs with the message. A soft lockup is the symptom of a task or kernel thread using and not releasing a CPU for a period of time. 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 Re: Ryzen linux kernel bug 196683 - Random Soft Lockup Just built the kernel with CONFIG_RCU_NOCB_CPU=y, and running it OK so far (kernel boot parameter: rcu_nocbs=0-15). It is Oracle Linux 7. BUG: soft lockup - CPU#11 stuck for 10s! [named:4162] CPU 11: Modules linked in: ip_nat_ftp ip_nat ip Package: src:linux Version: 4. Additional Information. Package: linux-image-4. Only way to get updated system now is install new one, and here i have a problem. One way a soft lockup can occur is when the machine goes into a loop with interrupts turned off. Systems; Start date Jan 14, 2021 BUG: soft lockup - CPU#63 stuck for 22s! [bridge:31481 Age Commit message ()Author Files Lines; 2010-03-21: softlockup: Stop spurious softlockup messages due to overflow: Colin Ian King: 1-2 / +2: Ensure additions on touch_ts do not overflow. Property. The technical reason behind a soft lock involves CPU interrupts and nmiwatchdog. One of the VMs is used for hosting my wordpress site with Centos7 (centos-release-7-6. I see that this got some nontrivial attention in 2016/2017, but I have not seen any resolution was reached after scouring the web some years later. Feb 10 02:58:09 shannon kernel: [44668. 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. centos. We have also seen these messages on an idle system with a large core count. [root@ ~]# xm sched-credit Name ID Weight Cap Domain-0 0 65535 200. May 8, 2019. Below are some of the crash: Today i had some time to investigate this issue further and i made some interesting observations: 1. A soft lockup is the symptom of a task or kernel thread using and not releasing a CPU for a period of time (the softlockup_thresh setting ). The ones I experienced are mainly due to Hardware problem: unexpected interruptions that either put the system in a irrecoverable situation, send the kernel execution into &quot;space&quot;, break the stack Linux Linux Networking Linux Distributions VMware Virtualization. Generally, this is the parameter set by default: xm sched-credit -d 0 -c 200. 9 Comments 3 Solutions 3980 Views Last Modified: 9/5/2016. Raspberry Pi B (mainline kernel 4. 2. AMD Phenom 9150e 1. org Bugzilla – Bug 10396 BUG: soft lockup - CPU#0 stuck for 61s! [modprobe:2096] Last modified: 2013-04-09 06:23:26 UTC HI all, I recently had the feeling that my server had some problems. interrupts enabled. Table 1. 引起soft lockup的原因一般是死循环或者死锁, 死循环可以通过栈回溯找到问题点;死锁问题需要打开内核的lockdep功能。 打开内核的lockdep功能可以参考《Linux死锁检测-Lockdep》。 下面看一个while(1)引起的soft lockup异常分析: Oracle Linux CVE Details: CVE-2020-36311. 1. Currently i have very outdated version of Linux Mint. 3. . FS#67649 - [linux] CPU soft lockup in smp_call_function_many_cond during boot with SMP. In case the lockup occured we are always able to "rescue" the BCM2835 from this state by sending some serial data to the [SOLVED] Linux Bridge delete vlan - CPU soft lockup. The VM has the following seup: CentOS 7 64-bit, 16GB memory, 8 vCores and 180GB storage, VM version 8.