Linux soft lockup The technical reason behind a soft lock involves CPU interrupts and Suggested solution: update your infinite loop to use a counter variable to print messages only every X iterations, where X is at least 10,000,000 (<- somewhat arbitrary). Let me know if you have any other ideas for troubleshooting. Applies to: MySQL Cluster - Version 7. log" (no other file) to a zip file. org I find bug 196683, where a "workaround" is suggested: 1) kernel configured RHEL8. 2. 14. 35] and later Soft lockups and RCU sched CPU stalls are detected where many CPUs are looping in a spinlock. The GPUs seem to work fine on some other tasks, but crash when I try to run a LLM, causing soft lockup of one CPU. 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. A hard lockup is encountered and then the kernel crashes in the end. 466 and VB ver. FS#70236 - [linux][linux-zen] 5. 34 works for most. The syslog prints out many entries like (and also call stacks detailing what the threads were doing, Linux kernel PoolThread is visible) : Resolution. 04 Server, several times I install and purge nvidia drivers to try if one of them works for me. 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. The default value is 200 meaning the NMI watchdog is set to 30s (based on watchdog_thresh equal to 10). These drivers are installed by apt. mlocat:79493] Apr 19 09:02:59 Z560 kernel: [42220. The reddit thread seemed to be the right direction to go (who would have thought). Applies to: Linux OS - Version Oracle Linux 7. max_cstate=5 rcu_nocbs Soft lockup occurred on the system upon a stress test. Sysrq being a key on IBM compatible keyboards since original IBM PC in 1981; some modern keyboards don't have it printed on Softlockup detector and hardlockup detector (aka nmi_watchdog)¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. Select a discussion category from the picklist. Linux lets you set resource limits, including how much memory one process can consume, via setrlimit(2). Seemingly randomly I get a total freeze, no caps lock or numlock lights but I can use the magic sysreq combinations to reboot. 8. x86_64 cat /etc/issue Scientific Linux release 6. Serial console runs very slow System reports soft lockup messages on boot like this one: BUG: soft lockup - CPU#29 stuck for 67s! [async/5:7802] CPU 29 Modules linked in: Pid: 7802, comm: async/5 Not tainted 2. Commented Jun 24, 2019 at 3:19. Attached to Project: Arch Linux Opened by env (ENV25) - Tuesday, 30 Also note the "soft lockup" messages happen before systemd's initramfs messages, so it probably happens before initramfs. . This interrupt(s) function calls a soft-lockup counter, it will compare the current time stamp with the specific kernel CPU data structure time information. 666057] BUG: soft lockup - CPU#31 stuck for 22s! [migration/31:420]\ Red Hat Enterprise Linux 7. 979162] NMI watchdog: BUG: soft lockup - CPU#26 stuck for 23s! [ptlrpcd_00_00:12056] [56376. 121452] Modules linked in: amd64_edac_mod edac_mce_amd kvm_amd kvm irqbypass mlx5_core(OE) mlxdevm(OE) auxiliary(OE) mlx_compat(OE) mlxfw(OE) nls_iso8859_1 ipmi_ssif rndis_host cdc_ether usbnet joydev input_leds mii k10temp shpchp ipmi_si ipmi_devintf ipmi_msghandler mac_hid So, I have several B250 that I have the same problem with as well. There are special interrupt(s) in the kernel. I have developed a dummy kernel module with below code, with an intention to trigger softlockup: static int __init soft_lockup_init(void) { printk( "Soft lockup, CPU stuck" on Red Hat guests after upgrade to Fusion 12. Primarily, the CPU soft lockup garbage. 6: 1941: October 14, 2021 Heavy Hello, I am currently experiencing boot problems. Visit Stack Exchange I have Win 11 build 22000. Disable Transparent Huge Page (THP) to avoid such busy memory-compaction, and; add "numa_balancing=disable" to the kernel parameter followed by reboot, OR Judging by the backtrace, this sounds more like some sort of a bug in the igb network interface driver or the network packet driver af_packet. x86_64 fails to boot with soft lockup messages during loading/unloading of an unsigned (E) Out-of-tree (O) kernel module. In the Linux kernel, the following vulnerability has been resolved: io_uring: add a schedule point in io_add_buffers() Looping ~65535 times doing kmalloc() calls can trigger soft lockups, especially with DEBUG features (like KASAN). 0 VMWare Workstation 16 Pro + Ubuntu 22. This makes me think that the problem is not a hardware one, at least in my case. i had just waiting for hours. Anybody knows 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. Enter a title that clearly identifies the subject of your question. 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). It remains locked after trying soft reboot, and the only solution is a forced reboot with sysreq. Code: Select all Apr 19 09:02:59 Z560 kernel: [42220. CPU Soft lockup ===== 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. and I am now trying to re-use the latest linux kernel. Situation: Two soft lockups on boot, consistent between reboots: Jun 01 10:41:45 noah-pc kernel: watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [systemd-logind:897] Jun 01 10:41:45 noah-pc kernel: Modules linked in: snd_seq_dummy snd_hrtimer nft_objref The upgrade process itself went smoothly from 8. generix February 21, 2024, 9:23am 4. VirtualBox 6. The zfs lock is registered systematically after some intensive IO on each OS reboot. 136595] watchdog: BUG: soft lockup - CPU#1 stuck for 23s![systemd:1] The bold numbers change as it counts up. ↳ Chat about Linux Mint; ↳ Chat about Linux; ↳ Open Chat; ↳ Forums Feedback; ↳ Suggestions & Feedback Archive; International; ↳ @coderfive Sounds like you already realize that the soft lockup is per CPU, so you can't just take over it. 084576] watchdog: BUG: soft lockup - CPU#6 stuck for 23s! [VM Thread:4054] I replaced my hardware but my disks. z kernel-3. 6 with Unbreakable Enterprise Kernel [4. org I find bug 196683, where a "workaround" is suggested: 1) kernel configured The Linux kernel has a process which monitors each CPU on the system. Re: BUG: soft lockup - CPU# Post by Perryg CPU Soft Lockup event Occurs when a task is using the CPU for more than time the allowed threshold (the tunable kernel. Indeed, the initial report in that thread sounds more like the problem you report. From time to time my host machine crashes. A ‘softlockup’ is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds (see 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. Everything usually freezes for several seconds while this happens. 3-1. When I have 2+ cpus setup in the vm I will get soft lockup and excessive cpu usage. I have alrealdy Windows 10 installed(i did a restore of the windows), I created a partition and the boot pen with Fedora media writer. But there could be settings on the host OS that may interfere. Refering to the back trace at the last part of the screen capture, I suspect testd was crashing and that triggered a CPU soft lock up. Ryzen linux kernel bug 196683 - Random Soft Lockup I have Ryzen 7 1800X, ASUS Prime X370-PRO, running Fedora 26 and 27. 1-Ubuntu SMP X86_64 platform? When this happened, I use 'kill' and 'kill -9', but it didn't work. I found a pacnew file for /etc/bluetooth/main. 0-1160. 9. Make sure the VM is fully shut down, then right click it in the manager UI. 32-71. Does any know what this “Soft lockup bug” is?? Is there any way to KILL it?? Will a can of Industrial Strength RAID! kill it? Sep 04 08:09:21 amaryllis kernel: watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [swapper/2:0] Sep 04 08:09:21 amaryllis kernel: Modules linked in: ccm michael_mic rfcomm cmac algif_hash algif_skcipher af_alg uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobu> Sep 04 08:09:21 amaryllis kernel: snd_sof_pci snd_sof_xtensa_dsp 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". I used 'pacman -Syu' every week， So，I don’t know after which update the failure occurred. 65-3+deb9u2 Severity: normal Hey. el8. 19, 6. Post by scottgus1 » 11. The kernel crashes due to the soft lockup frequently. 0-5-amd64 Version: 4. If unsure, say N. – heynnema. ) First lockup in my current session: Stack Exchange Network. 979182] Modules linked in: nfsv3 nfs_acl mgc(OE) lustre(OE) System get frequent soft lockups reports from a worker performing smb2_reconnect_server : [14115. Post by scottgus1 » 22. If the kernel is working right a soft lockup should never happen Code: Select all Apr 19 09:02:59 Z560 kernel: [42220. A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more. Xen, KVM, OpenVZ, VirtualBox, VMware, Linux-VServer and all other Linux Virtualization platforms are welcome. 1 on my Dell laptop (dual-boot with Windows 11), and if I have any devices connected to the USB-C or USB-A ports, I frequently get e. 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. EDIT: rereading your post, it could be beneficial to upgrade any firmware/drivers that your network equipment uses. 6 to 8. For example: Linux arkp-nas 4. He derived NGEL from Centos. 13-rc+HEAD Help text Say Y here to enable the kernel to panic on "soft lockups", which are bugs that cause the kernel to loop in kernel mode for more than 20 seconds (configurable using the watchdog_thresh sysctl), without giving other tasks a chance to run. Top. I've been seeing sporadic messages of the form "BUG: soft lockup - CPU#0 stuck for 22s!" from the System Notifier for several months -- I've had at least three or four kernel The Linux kernel can act as a watchdog to detect both soft and hard lockups. 0–4. I found the same issue with kernels linux 6. 10. I believe that happens nowadays more BUG: soft lockup - CPU#0 stuck and something about snd_hda_intel First off, this is unlikely to be a hardware issue on my side, since my hardware was active recently and was running with no problems. When I try to run nvidia-smi I always get: Message from Here is what solved it for me: I saw this post on Linux Mint Forums and followed the advice of Laurent85:. 11 - Very slow boot process. [26314590. 19, 4. Viewed 2k times 2 Being unable to ssh into a machine I connected it to a monitor and found the following: freeSSHd SCP Linux to Windows Fails with "exec request failed on channel NMI watchdog: BUG: soft lockup - CPU#4 I saw here in forum a lot of problem like this, but they could install the O. How can I create a CPU soft lockup with a userspace C program in 4. ソフトロックの技術的な理由には、CPU 割り込みと nmi-watchdog が関係しています。 システム上の各オンライン CPU に対して、 Issue. Dec 04 20:20:46 green kernel: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:1:53] Dec 04 20:20:46 green kernel: Modules linked in: radeon ttm fuse uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev media hp_wmi sparse_keymap joydev x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_p clmul Feb 10 02:58:09 shannon kernel: [44668. found in Linux kernels: 2. 0-8-amd64 (debian-kernel@lists. Unix & Linux: BUG: soft lockup - CPU# stuck for x secondsHelpful? Please support me on Patreon: https://www. Linux kernel soft lockup is seen, causes the cluster to hang, or triggers an All Paths Down. Are you ssh'd into this machine? 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. Very new to Ubuntu (linux) so please forgive me if I need specific instructions Trying to get Ubuntu 20. I also found another webpage with instructions to run startx -- -logverbose 6 first, but that command also appears to hang. Below is the message that show up when CPU soft lockup This, in combination with newer kernel version, which, for some reason, seem to be more susceptible to such soft lockups, made the Arch Linux jobs soft lockup quite a lot, see [0]. 6. It may happen that you'll help solve some problem in the Linux kernel :). Soft lockup CPU stuck when tryng to switch to VT consoles with NVIDIA driver installed. conf file: Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. Linux now supports local caching of certain file systems (currently only NFS and the in-kernel AFS file systems). Press Tab to edit your selection. Ask Question Asked 5 years, 10 months ago. the soft lockup errors. It has a lot of "watchdog: BUG: soft lockup - CPU#4 stuck for 45s! [worker:131043]" messages. falcosecurity/falco#896 Or do we know any workaround for this Is there anyone working on the following issue? Basically it's with sysdig ebpf running on Linux kernel 4. I tried another Linux mining OS and it did the same thing. System Hangs with "BUG: soft lockup" errors in /var/log/messages. run: $ sudo apt-get upgrade OR $ sudo apt upgrade Install kernel updates on a Ubuntu LTS server. 18. ソフトロックアップ は、タスクまたはカーネルスレッドが CPU を使用し、許可されている時間よりも長い間、CPU を解放していないことを示す症状です。. Unless this situation is caused by external factors (see Additional Information section below), this is usually indicating a bug. One of the common occurrences of cpu soft lockup in HANA environments occurs due to the attempted cleanup of the dentry cache. But you can lower the priority of your task and let the soft lockup watchdog run when it needs to run, which will in turn eliminate the lockup. This can cause symptoms that range from a temporarily unresponsive system to a total system lockup. Run until you see the problem happen, then shut down the VM from soft lockup和hard lockup介绍 主体主要涉及kernel线程、时钟中断、NMI中断。优先级：kernel线程<时钟中断<NMI中断 soft lockup和hard lockup主要调试以下问题： 抢占被长时间关闭而导致进程无法调度（soft lockup） 中断被长时间关闭而导致的问题 (hard lockup) R状态死锁监测 R状态死锁是指某一任务一直处于T For the non-preemptable version of the kernel, the soft lockup detector detects less than 40% of lockups be- cause most of them occur when interrupts are disabled. The hash rate drop is interesting. d -f apparmor remove 2. A way to reproduce it: Have hugepages enabled on the main system, And have a container with linux BUG: soft lockup - CPU#0 stuck for 60s! [events/0:38] And the it hangs up until I reboot it. I have downgraded to the linux-lts kernel and it's back to normally. Linux. Conditions: The issue is remedied by ESXi 8. If the kernel is working right a soft lockup should never happen 而soft lockup出现的原因是，在软中断一直处于占cpu100%的情况下，内核有大量的软中断需要处理，当有进程在内核态触发软中断，就会使得该进程更难从系统调用的内核态返回，反复在内核栈->硬中断->软中断->内核栈之间不停的pin pon导致该进程在系统调用里面因为 Check for AMD processor recalls that only effect Linux. 106962] BUG: soft lockup - CPU#1 stuck for 22s! [watchdog/1:14] The process that is reported varies as does the CPU that the soft lockup is reported on. I’m booting through my external drive (2TB external drive). 首先澄清两个关于soft lockup的误区： soft lockup并不仅仅是由死循环引起的。 soft lockup并不是说在一段代码里执行了23秒，22秒。 这里简单解释一下上面的两点。 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 Recently, some Linux VMs got an abruptly significant increase in CPU speed,then system hung. ] Oct 4 23:17:34 localhost kernel: CPU: 61 PID: 10809 Comm: iomonkey Kdump: loaded Not tainted 3. 1 20210110, GNU ld (GNU soft lockup - CPU#8 stuck for 22s! [kworker/8:1:134]` and logs keep going like this, one every 10 seconds maybe. Jun 2022, 02:57. 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 ソフトロックアップ は、タスクまたはカーネルスレッドが CPU を使用し、許可されている時間よりも長い間、CPU を解放していないことを示す症状です。 ソフトロックの Most likely a faulty kernel, aka kernel bug, causes the lockups. com/roelvandepaarWith thanks & praise to Debian 11 ~ Linux version 5. I got myself the newest installation image (which also runs kernel 5. The watchdog daemon will [Linux] What does the kernel message "soft lockup" mean? The kernel detects when there is too much time gone between two timer ticks. 27-1. The panic can be used in combination with panic_timeout, to cause the system to reboot automatically after a lockup has been detected. 4. For RHEL 7, users must be aware of the following steps that can avoid the soft lockup from occurring. 136287] Modules linked in: vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) uvcvideo snd_hda_codec_hdmi videobuf2_vmalloc videobuf2_memops snd_ctl_led videobuf2_v4l2 videobuf2_common Issue. patreon. 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. Hmm before I tried setting to vcpu=1, I tried three other things: 1. 15. 1 - VM unresponsive with high CPU When actively using the VMware Workstation Linux RHEL 8 VM, the symptom manifests as the VM quickly goes from responsive to sluggish, to extremely sluggish, to unresponsive. 536212] watchdog: BUG: soft lockup - CPU#64 stuck for 26s! My Linux kernel version is, 4. 0 (Carbon) Description . Soft lockup. 783952] CPU: 27 PID: 3241 Comm: node_exporter Kdump: loaded Tainted: G Red Hat Enterprise Linux 7. Improve this answer. 32 r149290. BUG: soft lockup" events being logged, * but mostly the system just stops and I can find no logging that tells me why. The computer is unusable until I power cycle and use the previous Kernel, which was 4. Start the VM from full normal shutdown, not save-state. 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 Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. 0–3. 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!". And it's the same when backup or transfer get high io and soft lockup. 807418] watchdog: BUG: soft lockup - CPU#3 stuck for 26s! [kworker/3:0:70557] [14115. Reason: Topic automatically closed 6 months after creation. The below example 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. Root cause unknown. and it's like doesn't stop. 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。 当然，副作用就是”nohz_full“指定 的cpu即使在内核产生了lockup问题我们也无法检测到。不过，至少我们可以允许watchdog 线程在管家(non-tickless)核上继续运行以便我们能继续正常的监测 I have installed the latest 12. 1, but after rebooting I am getting these "BUG: soft lockup" errors. The same, when I try to run nvidia-smi I always get log like “watchdog: BUG: soft lockup - CPU 0 stuck for 22s!” and the process “nvidia-smi” c Rocky Linux 9. Hence my observation that you do need to care about other threads. I am further concerned about this because: @generix unfortunately it appears to still be hanging up in the same place. 0b build #21203435 and later. 3. This easily happens, if the system is halted with the debugger. (I'm also seeing suspend issues, where sometimes suspend doesn't seem to kick in, or only delayed, but I'm not sure whether these are related yet. Re: Soft lockup - CPU stuck on ethernet plug in So from linux-lts its last commit is 概念说明 Linux内核Lockup就是linux内核占用CPU不放，Lockup分为两种：soft lockup 和 hard lockup。 soft lockup是指CPU被内核代码占据，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[watc The kernel detects when there is too much time gone between two timer ticks. 6 I keep getting a message at times referring to a " Soft Lockup Bug". After having applied the latest updates, I tried your suggestions today. 10 client I'm getting: [2860. 19. Share. View in full-text Similar This, in combination with newer kernel version, which, for some reason, seem to be more susceptible to such soft lockups, made the Arch Linux jobs soft lockup quite a lot, see [0]. 1. x86_64 #1 Oct 4 23:17:34 localhost kernel: Hardware name: Dell Inc. I had it set to `autoenable = false`, so commenting this line solved the issue. As a guest OS has no way to know if this has happened, the host's logs should be investigated whether the hypervisor suspends the guest, for example due to slow memory Ryzen linux kernel bug 196683 - Random Soft Lockup I have Ryzen 7 1800X, ASUS Prime X370-PRO, running Fedora 26 and 27. Type the following apt-get command: $ sudo apt-get dist-upgrade I just bought a Nvidia Tesla K80 for my proliant ml310e v2 gen8 server, but I can’t properly install the drivers. conf with the default option `autoenable = true`. Select the install type you want "Install" or "Graphical Install" with the arrow keys. 784987] watchdog: BUG: soft lockup - CPU#53 stuck for 22s! [kswapd4:543] [138070. 4 Guest OSses: Windows, Linux. 5 on qemu. Your gis userland process is probably the main thing that talks to the network on that machine, so it appears connected, but soft lockups are really kernel space bugs. conf file: kernel:BUG: soft lockup - CPU stuck for 68s! in sctp_assoc_update_retran_path Soft lockup hang panic with backtrace similar to: RIP: 0010:[] [] sctp_assoc_update_retran_path+0x6d Red Hat Enterprise Linux (RHEL) 6. 4; Known Issues; Certain SEV Guest Configurations Might Cause Hypervisor CPU Soft-Lockup Warnings; Certain SEV Guest Configurations Might Cause Hypervisor CPU Soft-Lockup Warnings. Often times the only solution is to power off the host to recover. 136287] Modules linked in: vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) uvcvideo snd_hda_codec_hdmi videobuf2_vmalloc videobuf2_memops snd_ctl_led videobuf2_v4l2 videobuf2_common FS#71575 - watchdog: BUG: soft lockup - CPU | Dell XPS 13 9310 Attached to Project: Arch Linux Opened by Maximilian Konter (Biskit1943) - Wednesday, 21 July 2021, 17:02 GMT Last edited by Toolybird Since the latest kernel update (linux 5. 52. Reducing server load is normal Also seeing various soft lockup messages, sometimes before the LUKS passphrase prompt, sometimes after. 2; kernel-3. 6. This "random soft lockup" is characterized by logging messages of the form: NMI watchdog: BUG: soft lockup - CPU#12 stuck for 23s! [DOM Worker:1364] which appear, possibly many times, before the system freezes completely. arch1-1and linux-lts 6. Achievements 1. I believe the issue is in the kernel space itself. 27–2. 2. processor. A soft lockup (or rarely even a hard lockup) timeout can also occur if the Linux system is running in a virtual machine and the hypervisor does not schedule the guest for a prolonged time. I enabled SysRq, and tried to 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. This explains why going back to older kernel was sucessful. 3 cuda tool kit and the corresponding nvidia-driver following nvidia instruction. I have a feeling (although I TOTALLY could be wrong) that this isn't an application-level problem and that it is a kernel/module-level issue. Check for processes taking too much CPU time. This has happened on multiple systems now, often more than once. Disable apparmor on the Dom-0 - /etc/init. watchdog_thresh , default is 20 seconds). 19. 而soft lockup出现的原因是，在软中断一直处于占cpu100%的情况下，内核有大量的软中断需要处理，当有进程在内核态触发软中断，就会使得该进程更难从系统调用的内核态返回，反复在内核栈->硬中断->软中断->内核栈之间不停的pin pon导致该进程在系统调用里面因为 Graphics / Linux. 5 and later MySQL Server - Version 5. updating the kernel seems like a only 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. el7; Dell PowerEdge R640; Subscriber exclusive content. First of all, I am using a Headless Ubuntu 20. 784999] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs cpuid rpcsec_gss_krb5 nfsv4 nfs fscache vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) zstd z3fold binfmt_misc zfs(PO) zunicode(PO) zavl(PO) icp(PO) On jaguar with is running 8. Usually, soft lockup is caused by some code (for example, in kernel thread, or interrupt handler) doesn't release CPU (for example, disable interrupt), there is one soft lockup watchdog thread per CPU core, once this thread has no chance to run in a long period, watchdog will be triggered. It allows to continue to access data, but all writes won't be commited to disk, since reboot needs ctrl+shift+sysreq reisub. Softlockup detector and hardlockup detector (aka nmi_watchdog)¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. but CPU Soft Lockup event Occurs when a task is using the CPU for more than time the allowed threshold (the tunable kernel. Repeatedly seeing Qemu VMs locking up with guest Linux kernel reporting: "watchdog: BUG: soft lockup - CPU# stuck for s!" e. This permits remote data to be cached on local disk, thus potentially speeding A Live-USB Ubuntu version, does not crash (noted, I did not try this very same Live-USB before) anymore (some Live-USB Linux version did crash when launching firefox). - When a soft-lockup is detected, the kernel will print the - current stack trace (which you should report), but the - system will stay locked up. 0-162. log:. 66. My own kernel still crashes. rcu_sched self-detected stall on CPU + watchdog: BUG: soft lockup - CPU#3 stuck for 22s. 67-2+deb10u1 (2019-09-20) x86_64 GNU/Linux Ryzen 1700 (not overclocked, stock cooler) That soft lockup message can be caused by a faulty or insufficient power supply, is your machine well-provisioned in that regard? deadbang. Red Hat Enterprise Linux (RHEL) SMP enabled VMWare Virtual Machine Softlockup detector and hardlockup detector (aka nmi_watchdog)¶ The Linux kernel can act as a watchdog to detect both soft and hard lockups. Jan 21 17:14:41 x79dual4d-debian kernel: [979061. I’m new to cuda and nvidia driver, so I really can’t understand what’s going on by looking at the attached bug report. I tried 'systemctl restart nfs-server',it didn‘t work. This permits remote data to be cached on local disk, thus potentially speeding Oracle Linux 7 Virtual Machine CPU#0 Gets Stuck in "soft lockup" Continuously (Doc ID 2789406. 136272] watchdog: BUG: soft lockup - CPU#0 stuck for 4686s! [updatedb. Sep 1 11:09:55 majestic-daemon kernel: [ 3506. BUG: soft lockup detected on CPU#0 相关文档：什么是 CPU 软死锁（soft lockup）? Environment. x86_64 #1 HP ProLiant BL685c G7 RIP: 0010:[] [] lock_kernel+0x2e/0x50 RSP: 0018:ffff883833eb1d20 EFLAGS: 00000293 RAX: sam. I did the When we enable CONFIG_DETECT_SOFTLOCKUP to detect soft lockups, it creates a new task called khungtaskd which will run every 1s. At startup edit the Grub menu entry and append kernel parameter nomodeset or modprobe. 843826] Modules linked in: nls_utf8 btrfs xor raid6_pq ufs So I've been having this issue since 3. 813284] Modules linked in: arc4 md4 sha512_ssse3 sha512_generic cmac nls_utf8 cifs ccm dns_resolver fscache vho st_net vhost macvtap macvlan tap nfsd auth_rpcgss nfs_acl Apr 24 01:37:36 greg BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0] Apr 24 01:37:36 greg CPU 0: Apr 24 01:37:36 greg Modules linked in: radeon drm cpufreq_ondemand nls_cp437 vfat fat joydev snd_seq_oss snd_seq_midi_event snd_seq firewire_ohci firewire_core snd_seq_device pcmcia crc_itu_t irda snd_atiixp sdhci snd_pcm_oss snd_atiixp_modem crc_ccitt psmouse My system is experiencing soft-lockups, e. it said watchdog: BUG: soft lockup - CPU#6 stuck for 22s. 783952] CPU: 27 PID: 3241 Comm: node_exporter Kdump: loaded Tainted: G Frequent soft lockup and crash possibly caused by the faulty hardware - Red Hat Customer Portal Re: Random freeze, sometimes with hard/soft LOCKUP on cpu So, one week has passed and linux-lts kernel has been rock solid for me. org) (gcc-10 (Debian 10. 843824] NMI watchdog: Watchdog detected hard LOCKUP on cpu 13 Sep 1 11:09:55 majestic-daemon kernel: [ 3506. BUG: soft lockup - CPU#3 stuck for 11s! [frob:2342] Red Hat Support requests a vmcore from the system at the time of the soft-lockups to aid in the analysis of the underlying problem. Follow answered Jul 26, 2011 at 7:01. I might try on a smaller drive soon. The problems occurred out of nowhere. Please switch off the soft lockup detection by disabling CONFIG_DETECT_SOFTLOCKUP in the kernel configuration. Topic moved to "Linux Guests". title Linux (serial console) root (hd0,2) kernel /boot/vmlinuz-2. Logs show messages like (examples from different sources): BUG: soft lockup - CPU#6 stuck for 73s! [flush-253:0:1207] BUG: soft lockup - CPU#7 stuck for 74s! [processname:15706] BUG: soft lockup - CPU#5 stuck for 63s! Migration thread soft lockup messages present on server and CPU hang x86_64 [ 392. A value of 0 means no change. Soft lockup detected under a heavy memory pressure on a large NUMA system. org I find bug 196683, where a "workaround" is suggested: 1) kernel configured I want to generate a CPU soft lockup to learn debugging crashes. Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. 04. 0-327. As a first step I'd suggest examining the changelog for the driver in later My Ubuntu 20. I powered my laptop down and powered it back up since I have forgotten something and I got this message: watchdog : BUG: soft lockup - CPU#2 stuck for 23s! Probably a kernel issue, since reverting the driver to 470 doesn’t change the behaviour. Red Hat Enterprise Linux (RHEL) SMP enabled VMWare Virtual Machine Serial console runs very slow System reports soft lockup messages on boot like this one: BUG: soft lockup - CPU#29 stuck for 67s! [async/5:7802] CPU 29 Modules linked in: Pid: 7802, comm: async/5 Not tainted 2. You should have a look at the stack strace info dumped by the kernel. This document (7023049) SUSE Linux Enterprise Server 12 SUSE Linux Enterprise Server 11 SP4. it still continue the process. The processor architecture is arm. FoobyDeb Posts: 3 I am using vanilla Linux kernel v6. Monitoring and manual intervention to dump the vmcore during an occurrence by undertaking the methods described in the article What is the Sysrq The soft lockup timeout is not impacted. 04 onto following device: Soft lockup is caused when something goes into one CPU thread in order to get executed but doesn't get out after finishing the execution [swapper/111:0] Aug 28 14:23:06 AMS kernel: [1499509. 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 When a soft-lockup is detected, the kernel will print the current stack trace (which you should report), but the system will stay locked up. If I look at the last messages in my journalctl I see the following: May 14 16:09:19 jackdesk kernel: watchdog: BUG: soft lockup - CPU#7 stuck for 23s! [swapper/7:0] Blockquote BUG: spinlock lockup suspected on CPU#0, sh/11786. I made about 5 to 7 boot runs, of which only one failed. 124689] watchdog: BUG: soft lockup - CPU#63 stuck for 22s! [kworker/63:1:1026052] [26314590. [ 253. nvidia-smi. Updates were already done before and the system was running smooth. 0-6-amd64 #1 SMP Debian 4. 981879] BUG: soft lockup - CPU#4 stuck for 59s! [PoolThread:3673] soft lockup并不仅仅是由死循环引起的。 soft lockup并不是说在一段代码里执行了23秒，22秒。 这里简单解释一下上面的两点。 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。 I have another, with archlinux for work ( soft dev, testings i use this one as my main desktop. Kernel errors received on VMWare guest: BUG: soft lockup detected on CPU#0 Related article: What is a CPU soft lockup? Environment. Though the Comm field in the report shows testd which is my application, I dont think that could cause this issue. 99 ro root=/dev/sda3 console=ttyS0,115200 console=tty0 Here tty0 refers to “the” NMI watchdog: BUG: soft lockup - CPU#4 stuck for 22s ! [gpu manager:1496] Last edited by LockBot on Wed Dec 28, 2022 12:16 pm, edited 2 times in total. el7. S. Also it could generate series of lockups with cooling-down periods. When running headless without nvidia-persistenced, the driver will allways init/deinit with a chance of ending in a deadlock at some time. Kernel:NMI Watchdog: BUG: Soft Lockup - CPU Stuck [ndbmtd] messages and sudden cluster slowness (Doc ID 2353004. 132847] Modules linked in: nf_tables nfnetlink sctp sit tunnel4 ip_tunnel 8021q garp mrp stp llc bonding intel_rapl_msr intel_rapl_common nfit this problem comes when i upgrade to the linux kernel to 4. For more information on the original issue see VMware A soft lockup happens on a CPU on which a task is calling smp_call_function_many() and waiting for a targeted CPU to handle the IPI. Sysrq being a key on IBM compatible keyboards since original IBM PC in 1981; some modern keyboards don't have it printed on This builds the "test_lockup" module that helps to make sure that watchdogs and lockup detectors are working properly. Modified 3 years, 8 months ago. After a little research I think it seems to be a kernel bug or something. 084578] Modules linked in: veth nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo br_netfilter bridge stp llc rpcsec_gss_krb5 auth_rpcgss aufs nfsv4 nfs lockd grace fscache overlay isofs xt_nat xt_MASQUERADE xt Virtual machine guest suffers multiple soft lockups at the same time We are experiencing kernel panic due to softlockup. 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. – Tsyvarev. 7 system with the kernel version 4. 0–5. A Red Hat subscription provides My Ubuntu box hangs frequently (several times per day), leaving messages like these (sometimes truncated) in the syslog and kern. May 6 17:36:35 suselinux kernel: [ 19456. Booting the system 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. 04 server lts with nvidia-driver-535-server or some earlier versions (525, 515). To configure the kernel to panic when a CPU Soft Lockup occurs, add the following to your sysctl. 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. Code: Select all May 15 06:59:07 5gum kernel: watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [runc:571013] May 15 06:59:07 5gum kernel: Modules linked in: binfmt_misc veth xt_nat nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink xfrm_user xfrm_algo br_netfilter bridge stp llc ipmi_devintf ipmi_msghandler overlay nf_log_ipv6 ip6t_REJECT nf_reject_ipv6 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. 807915] CPU: Red Hat Enterprise Linux Red Hat OpenShift Red Hat Ansible Automation Platform All Product Docs BUG: soft lockup - CPU#0 stuck and something about snd_hda_intel First off, this is unlikely to be a hardware issue on my side, since my hardware was active recently and was running with no problems. – zfs thread lock after some intensive IO. 20, 5. A soft lockup can be triggered for a wide variety of reasons. When I try to run an Ubuntu 20. On older generation AMD systems that are based on the AMD Rome processors, such as E2 and E3 systems, a guest with more than 350GB kernel:watchdog: BUG: soft lockup - CPU#7 stuck for 210S! [server:1355] ^C [root@dev236 src]# Then, I looked at the program log, and the log file was constantly being appended, which indicated that my test program was still running. ---Apparently there was an issue related to systemd bluetooth. Soft lockup while loading the IBM shipped [filepath] module using the The release notes for the kernel patch "SUSE-SLE-SERVER-12-SP5-2023-2163" : - audit: improve audit queue handling when "audit=1" on cmdline (bsc#1209969). Linux - Virtualization and Cloud This forum is for the discussion of all topics relating to Linux Virtualization and Linux Cloud platforms. 04 server has started complaining: [138070. 6 server lts, Ubuntu 22. 6,561 1 1 watchdog: BUG: soft lockup - CPU#7 stuck for 22s! [swapper/7:0] It shows up as a Plasma notification, and it prints the message in every open Konsole window, and it shows up in dmesg. I have tried Ubuntu 20. As a guest OS has no way to know if this has happened, the host's logs should be investigated whether the hypervisor suspends the guest, for example due to slow memory Linux内核中有两种类型的lockup：softlockup和硬lockup。 它们都会导致系统无响应，但原因和表现有所不同。 softlockup通常是由于内核中的一个或多个任务长时间占用CPU，导致其他任务无法得到执行；而硬lockup通常是由于硬件问题或底层驱动程序错误导致的系统死锁。 It always only shows the soft and hard lockup messages directly on screen, and for some reason, nothing is being written to the journal. 23. Even though it reboots, I'm not really sure this is the right test procedure for generating soft lockup and recovery procedure from the soft lockup. So far, I haven't found any clue as to what to do or try (rather, the clues I've found and followed haven't stopped this from happening). A: Not fully understand your question. kernel. 813284] watchdog: BUG: soft loc kup - CPU#1 stuck for 22s! [lightdm-gtk-gre:9498] Jan 21 17:14:41 x79dual4d-debian kernel: [979061. Situation. If khungtaskd fails to get scheduled for 'n' seconds, then Kernel will declare a soft lockup. 0-1062. When I start a docker container A soft lockup is the symptom of a task or kernel thread using and not releasing a CPU for a period of time. So I edited the file /etc/default/grub, and edited the GRUB_CMDLINE_LINUX_DEFAULT line to this . 0–6. x86_64 #1 SMP PREEMPT_DYNAMIC Tue Apr 11 19:09:37 UTC 2023 I recently installed Rocky Linux 9. FS#67649 - [linux] CPU soft lockup in smp_call_function_many_cond during boot with SMP Attached to Project: Arch Linux Opened by Frantisek Sumsal (mrc0mmand) - Thursday, 20 August 2020, 10:14 GMT Last edited by freswa (frederik) - Sunday, 13 FS#67649 - [linux] CPU soft lockup in smp_call_function_many_cond during boot with SMP Attached to Project: Arch Linux Opened by Frantisek Sumsal (mrc0mmand) - Thursday, 20 August 2020, 10:14 GMT Last edited by freswa (frederik) - Sunday, 13 Guest OSses: Windows, Linux. loqs Member Registered: 2014-03-06 Posts: 18,045. Some more context, I haven’t installed linuxmint if that isn’t clear. Paweł Brodacki Paweł Brodacki. arch1-1) the laptop freezes after the window manager started. my system run zfs. 首先澄清两个关于soft lockup的误区： soft lockup并不仅仅是由死循环引起的。soft lockup并不是说在一段代码里执行了23秒，22秒。这里简单解释一下上面的两点。事实上，死循环并不一定会导致soft lockup，比如Linux内核生命 The Linux kernel can act as a watchdog to detect both soft and hard lockups. In the body, insert detailed information, including Oracle product and version. 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. Post by Say Y here to enable the kernel to panic on "soft lockups", which are bugs that cause the kernel to loop in kernel mode for more than 20 seconds (configurable using the watchdog_thresh sysctl), without giving other tasks a chance to run. 16. This test runs several systemd-nspawn containers in succession and sometimes the underlying VM locks up due to a CPU soft lockup (just to clarify, the topology is: CentOS Stream 8 (baremetal) -> Arch Linux (KVM) -> Arch Linux (nested KVM or QEMU TCG, happens with both) -> nspawn containers). x86_64 #1 HP ProLiant BL685c G7 RIP: 0010:[] [] lock_kernel+0x2e/0x50 RSP: 0018:ffff883833eb1d20 EFLAGS: 00000293 RAX: Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. 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。 当然，副作用就是”nohz_full“指定 的cpu即使在内核产生了lockup问题我们也无法检测到。不过，至少我们可以允许watchdog 线程在管家(non-tickless)核上继续运行以便我们能继续正常的监测 Package: linux-image-4. Dose it lockup my machine? YES!! But there is nothing “soft” about it. These Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. Linux other VBox Version: OSE self-compiled Guest OSses: *NIX. At bugzilla. Please provide a VM log file. No Linux based OS (Debian/Ubuntu) would boot up correctly. Sometimes, thete is no reported crash log at all. Pick one VM. I also have some ACPI errors, but I've always had those. My setup: i5 10600k MSI z490-a pro 8 gb ram 3080 Palit Gamerock LHR 3080 Palit Gamerock LHR 3080 Aorus Xtreme On my new desktop (AMD Ryzen 9 5900X, GeForce RTX 3070, Asus TUF X570-Plus, latest Archlinux + Gnome), at random times, the image on screen freezes and the system becomes unresponsive. Gen 1 in Bios is on, 4g is on, booting from usb stick. 7 on Kernel 4. 13. 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. : "watchdog: BUG: soft lockup - CPU#5 stuck for 26s! [swapper/5:0]" When the guest VM is in this condition, the host Linux OS reports that the Qemu process is typically running steadily at ~250% CPU. Re: VirtualBox 6. I tried with Ubuntu Desktop and Fedora Server -same issue. in my case is before it. 783936] Kernel panic - not syncing: softlockup: hung tasks [ 1505. 12, 6. I don’t know whatelse I Could nfs cause a more or less completely stucking system in case of (short?) write latencies (can I prevent a new soft lockup by using 'mount -o soft')? Or might this be a kernel bug? uname -r 2. On a physical host, a soft lockup message generally indicates a kernel bug or hardware bug. When running in a virtual machine, this might instead indicate high levels of overcommitment Hi everyone. GPU pass-through here too. 39, 3. New replies are no longer allowed. This indicates the CPU0 is lockup, and the thread/Process would be sh (or start by sh, I am not sure). 11. Offline #22 2018-01-28 22:09:14. A 'softlockup' is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds (see What is the kernel hard/soft lockup detector? Various hardware issues, bugs or poorly written code in the kernel can result in CPUs becoming stuck and not available for 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. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 1-6) 10. I have one rig with all Nvidia cards that I didn’t have the problem with. blacklist=nouveau to existing parameters quiet splash". 100003] BUG: soft lockup - CPU#1 stuck for 22s! [irqbalance:972] Feb 10 02:58:09 shannon kernel: [44668. This easily happens, if the system It seems the scheme of rebooting when soft lockup occur works, but I cannot see the log message like "BUG: soft lockup - CPU#2 stuck for 20s!". 32 BUG: soft lockup - CPU#1 stuck. One time I didn't seem to get Soft Lockup messages. The other two are AMD and I have the problem with. If both RAM and swap are full, then it appears you are hitting limits. 084576] watchdog: BUG: soft lockup - CPU#6 stuck for 23s! [VM Thread:4054] Aug 5 17:11:08 kernel: [ 2300. 29. Commented Dec 21, Can the scheduler or some critical kernel threads be preempted in a preemptible Linux kernel? 4 Kernel spin-lock enables preemption before releasing lock. 仮想マシンのゲストで同時に複数のソフトロックアップが発生します。 ソフトロックアップによるカーネルパニックが発生します。 ログには次のようなメッセージが表示されます (さまざまなソースからの例)。 BUG: soft lockup - CPU#6 stuck for 73s! [flush-253:0:1207] BUG: soft lockup - CPU#7 stuck for 74s! 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. [ 1505. service. Oct 4 23:17:34 localhost kernel: NMI watchdog: BUG: soft lockup - CPU#61 stuck for 21s! [iomonkey:10809] [. The technical reason behind a soft lockup may Aug 5 17:11:08 kernel: [ 2300. el6. In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range When running an SVA case, the following soft lockup is triggered: ----- watchdog: BUG: soft lockup - CPU#244 stuck for 26s! pstate: 83400009 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE= Mar 31 22:11:43 yggdrasil kernel: watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [Plex DLNA Serve:23621] I see some other information sometimes, but I can never find it in any log, journalctl only ever has one instance of the log line, but there are dozens in the tty when I restart. As a guest OS has no way to know if this has happened, the host's logs should be investigated whether the hypervisor suspends the guest, for example due to slow memory Saket Jain is a GNU/Linux sysadmin from Alwar, Rajasthan, India. I tried: nvidia-driver-470, nvidia-headless-470, and it doesn’t work. At the end of the line of boot parameters that 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. e wrote:After booting the installer and at the install menu: 1. 6 or earlier; Stream Control Transmission Protocol (SCTP) association with multi-homed endpoints; SCTP transport failover between A soft lockup (or rarely even a hard lockup) timeout can also occur if the Linux system is running in a virtual machine and the hypervisor does not schedule the guest for a prolonged time. Release Notes for Oracle Linux 9. 1) Last updated on AUGUST 01, 2024. The kernel lockup watchdog is designed to identify when a CPU is potentially stuck, report it to Aug 5 17:11:08 kernel: [ 2300. NMI Watchdog: BUG: soft lockup with Samsung EVO 970 and Ubuntu 18. So i'm trying for the first time to do a dual boot of Fedora 29 from a boot pen. 30 so you There are known issues with Ryzen and Linux. It seems you have plenty of room on your root partition, so I would think increasing the size of your swapfile is an option which might help your situation. ) I have 3-4-5 more, for database server, gitlab server, stuff like that. Run until you see the problem happen, then shut down the VM from within the VM's OS if possible. so the watchdog considers it a soft lockup and kicks in. Unfortunately, shared memory segments are allowed to exist kernel : BUG: soft lockup - CPU stuck for 89s! [java 2123] BUG: soft - lockup - CPU stuck for 90s! [java 2123] Have reviewed this forum for possible solutions and also google then tried the following: - reduced the number of CPUs to 2 then 1 in the settings - reduced the base memory - increased the base memory One purpose of soft lockup detector is to found long-run spinlock critical sections. With "debug" I can mostly boot into the current LTS kernel, even though I still get "Soft Lockup" messages most of the times. The effect is that the system is basically completely EDIT: rereading your post, it could be beneficial to upgrade any firmware/drivers that your network equipment uses. 12) and booted off the usb thumb drive. 1 (tried both with the default Gnome and XFCE editions) 5. This thread explains that adding. How many virtual CPUs does this VM 1. 32. 1) Last updated on JULY 03, 2023. I have not made any changes. 0-142-generic #146~16. Apr 2022, 12:40. This feature has negligible overhead. 0-372. debian. updating the kernel seems like a only workaround. I have attached it to the post, but it does look very similar to me. Under certain conditions, the Linux kernel will have soft lockup. 0 and later Information in this document applies to any platform. Resolution. He works for a worldwide leading consumer product company and takes great pleasure on working with Linux Internals alongwith using FOSS tools to increase productivity in all areas of his daily work. org I find bug 196683, where a "workaround" is suggested: 1) kernel configured The current stack trace is displayed upon + detection and the system will stay locked up. d/apparmor stop - update-rc. 0-425. 3. Current solution is to downgrade to 6. My question is what are the reasons that prevent khungtaskd from running? One that I found is- trying to acquire an already acquired Create kdump core on soft lockup. g. soft lockups: [56376. el7; Subscriber exclusive content. Depending on module parameters it could emulate soft or hard lockup, "hung task", or locking arbitrary lock for a long time. 32-431. 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. Select "Show Log" and save "VBox. There the "soft lockup" is more seldom and does not prevent the system to boot up. el9_1. Red Hat Enterprise Linux (RHEL) 5; Red Hat Enterprise Linux (RHEL) 6; Red Hat Enterprise Linux (RHEL) 7; 启用了 SMP 的 VMWare 虚拟机 kernel: [146980. pwyz wgocwp fbtv pqytb eotl roscw krk aikujs qiryvoo wrn