"rcu_sched self-detected stall on cpu" 是一个由Linux内核RCU(Read-Copy Update)子系统发出的警告信息,表明RCU调度器检测到某个CPU在处理RCU读侧临界区时出现了延迟,即该CPU在预期的时间内没有完成RCU的宽限期(grace period)。这通常意味着该CPU可能处于长时间占用状态,导致RCU的读侧临界区无法及时释放,进而影...
这个很关键,一般rcu stall的问题都是某高优先级task长时间占用cpu导致的。 2 CPU停滞检测源码解析 from linux 5.13 总体的调用路径如下: update_process_times->rcu_sched_clock_irq->rcu_pending->check_cpu_stall->print_cpu_stall 2.1 update_process_times /* * Called from the timer interrupt handler to...
[306.729557]rcu:INFO:rcu_schedself-detectedstallonCPU/* 关注点1 */[306.730137]rcu:2-...:(...
When CPU idle<10%, RCU stall warnings occurs after >24hour. Would you please help us in how we can resolve the issue. How to debug and narrow down the root cause. Attached Logs for more information:[285165.790740] INFO: rcu_sched self-detected stall on CPU[...
INFO: rcu_sched self-detected stall on CPU 0-...: (2 GPs behind) idle=ba3/2/0 softirq=57744173/57744175 fqs=792613 (t=915060 jiffies g=633773 c=633772 q=122002) Task dump for CPU 0: swapper/0 R running 0 0 0 0x00100004 ...
[ 1210.893349] INFO: rcu_sched detected stalls on CPUs/tasks:[ 1210.898858] 0-...: (1 GPs behind) idle=e42/2/0 softirq=38269/40214 fqs=4974[ 1210.905990] (detected by 1, t=21008 jiffies, g=433, c=432, q=3)[ 1210.912003] Task dump for CPU 0:[ 1210.915227]...
I'm getting "rcu_sched self-detected stall on CPU" errors in every VM at startup, and then if the VM's are under a heavy load, the proxmox host machine will also lockup and begin saying the same message. I'm not sure even how to figure out my root cause. Numerous google have ...
Linux 内核分析 rcu_sched self-detected stall on CPU_小立爱学习的博客 spin_lock最终会调用preempt_disable:关闭抢占,此时CONFIG_PREEMPT=y。不满足preempt_schedule_irq抢占,导致无法进程调度。 static inline void __raw_spin_lock(raw_spinlock_t *lock) ...
linux RCU https://zhuanlan.zhihu.com/p/570218921 [RCU stall] RCU stall 分析,RCU stall 内核文档翻译 https://www.cnblogs.com/
[ 6.380000] hub 2-0:1.0: 1 port detected [ 6.400000] MTK MSDC device init. [ 66.410000] INFO: rcu_sched self-detected stall on CPU [ 66.410000] 0-...: (1 GPs behind) idle=38b/140000000000002/0 softirq=178/179 fqs=6000 [ 66.410000] (t=6000 jiffies g=-189 c=-190 q=54) ...