Two boxes (lxd-armhf{1,2}) have been running for three days with cking's
kernel, 3 is running the standard xenial kernel. 1 and 3 don't respond
to ssh connections any more; 2 still does, but several processes are in
'D' state:root 47 0.0 0.0 0 0 ? D May13 0:00 [fsnotify_mark] root 12892 0.0 0.0 0 0 ? D May13 0:00 [kworker/1:0] root 26785 0.0 0.0 0 0 ? D May13 0:00 [kworker/1:2] (uninterruptible kernel sleep), such as lxd or systemd (pid 1). Calling "top" hangs as well (but "ps" works), and there are a ton of zombie processes (including lxd, check-new-release, sshd, socat). All three continue to have lots of dmesg like 203722.697873] rcu_sched kthread starved for 15002 jiffies! g50919 c50918 f0x0 s3 ->state=0x1 [209670.455074] INFO: rcu_sched detected stalls on CPUs/tasks: [209670.456446] 3-...: (126 GPs behind) idle=a7e/0/0 softirq=30811/30811 fqs=1 [209670.457910] (detected by 2, t=15002 jiffies, g=50962, c=50961, q=8377) [209670.459430] Call trace: So I'd say that this kernel did not really help (but also did not make things worse for sure). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1531768 Title: [arm64] locks up some time after booting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1531768/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
