Hi, I am running a Ubuntu 20.04.5 LTS on Nvidia Jetson AGX Orin platform with 12-cores as a guestOS, the kernel version is - 6.1.83-rt28. Kernel cmdline is: 'root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 mminit_loglevel=4 console=ttyTCU0,115200 console=tty0 firmware_class.path=/etc/firmware fbcon=map:0 net.ifnames=0' The cyclictest command 'cyclictest -Smp99 -H 3000 --histfile=orin_idle_hyp_4h.hist -D 4h' will hang randomly during the test, then the minicom console will show below messages: ... [97619.450889] [CPU11-E] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [97619.450894] [CPU11-E] rcu: 1-...!: (0 ticks this GP) idle=dc88/0/0x0 softirq=0/0 fqs=2 (false positive?) [97619.450914] [ CPU1-E] NMI backtrace for cpu 1 [97619.451912] [CPU11-E] rcu: rcu_preempt kthread timer wakeup didn't happen for 5251 jiffies! g6029253 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 [97619.451916] [CPU11-E] rcu: Possible timer handling issue on cpu=1 timer-softirq=342864 [97619.451918] [CPU11-E] rcu: rcu_preempt kthread starved for 5252 jiffies! g6029253 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [97619.451921] [CPU11-E] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [97619.451923] [CPU11-E] rcu: RCU grace-period kthread stack dump: [97619.451966] [CPU11-E] rcu: Stack dump where RCU GP kthread last ran: ... This issue doesn't show if run the Ubuntu 20.04.5 LTS with the same kernel natively on the Orin board. Any comments about this or what can I do to triage this issue?
