I'm reproducing rcu_sched timeouts all the time with a 4.4 kernel on a far slower ARM64 host with the same cloud images.
[ 157.555837] INFO: rcu_sched self-detected stall on CPU [ 157.561551] INFO: rcu_sched detected stalls on CPUs/tasks: [ 157.562669] 2-...: (14960 ticks this GP) idle=5b5/140000000000001/0 softirq=37/37 fqs=1354 [ 157.563478] (detected by 3, t=15002 jiffies, g=-251, c=-252, q=302) [ 157.564033] Task dump for CPU 2: [ 157.564468] swapper/0 R running task 0 1 0 0x00000002 [ 157.565071] Call trace: [ 157.565469] [<ffff800000086ad0>] __switch_to+0x90/0xa8 [ 157.566052] [<ffff80000011b714>] generic_handle_irq+0x34/0x50 [ 157.566256] [<ffff80000011ba70>] __handle_domain_irq+0x68/0xc0 -- 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] lockups some time after booting To manage notifications about this bug go to: https://bugs.launchpad.net/auto-package-testing/+bug/1531768/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
