I've been running 4 i3 instances running bionic, cosmic and xenial without any boot hangs using the following kernel boot parameters: nmi_watchdog=0 pcie_aspm=off nohpet
These have been running now for 8+ hours, with easily over 70 reboots per instance w/o any issues. I'll try and factor out which one(s) are the ones that are required. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-aws in Ubuntu. https://bugs.launchpad.net/bugs/1822175 Title: i3.metal flavour type fails to respond after a reboot Status in linux-aws package in Ubuntu: In Progress Bug description: Series: Cosmic Instance Size: I3.Metal Region: (Default) US-WEST-2 Kernel: linux-aws During SRU testing the i3.metal instance flavor type will sometimes fail to respond after the instance is rebooted. Usually this has been seen at least 2 or 3 times during at test cycle. While rebooting an I3.Metal instance on the AWS Cloud. I observed the following crash which resulting in tearing down the instance and starting over. The instance was only restarted ~4 times at the time of this failure. [[0;32m OK [0m] Reached target Shutdown. [[0;32m OK [0m] Reached target Final Step. Starting Reboot... Stopping LVM2 metadata daemon... [[0;32m OK [0m] Stopped LVM2 metadata daemon. [ 447.340575] INFO: rcu_sched self-detected stall on CPU [ 447.340577] INFO: rcu_sched self-detected stall on CPU [ 447.340580] INFO: rcu_sched self-detected stall on CPU [ 447.340587] INFO: rcu_sched self-detected stall on CPU [ 447.340590] INFO: rcu_sched self-detected stall on CPU [ 447.340592] INFO: rcu_sched self-detected stall on CPU [ 447.340595] Uhhuh. NMI received for unknown reason 21 on CPU 0. [ 447.340599] INFO: rcu_sched self-detected stall on CPU [ 447.340602] INFO: rcu_sched self-detected stall on CPU [ 447.340606] INFO: rcu_sched self-detected stall on CPU [ 447.340614] 53-...!: (43 GPs behind) idle=7ce/1/0 softirq=392/392 fqs=0 [ 447.340617] INFO: rcu_sched self-detected stall on CPU [ 447.340621] Do you have a strange power saving mode enabled? [ 447.340628] 1-...!: (1 ticks this GP) idle=79e/1/0 softirq=881/881 fqs=0 [ 447.340632] INFO: rcu_sched self-detected stall on CPU [ 447.340634] INFO: rcu_sched self-detected stall on CPU [ 447.340636] INFO: rcu_sched self-detected stall on CPU [ 447.340639] INFO: rcu_sched self-detected stall on CPU [ 447.340641] INFO: rcu_sched self-detected stall on CPU [ 447.340644] INFO: rcu_sched self-detected stall on CPU [ 447.340647] INFO: rcu_sched self-detected stall on CPU The full log can be seen in the attached file. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/1822175/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
