I can't repro this specific issue, I believe it may be a H/W issue as
reported in this bug. Other reasons for the reboot tests failing are
marked in comment #3. Marking this as won't fix.
** Changed in: linux-aws (Ubuntu)
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1822175
Title:
i3.metal flavour type fails to respond after a reboot
Status in linux-aws package in Ubuntu:
Won't Fix
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.
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