KVM on POWER8 host lock up since 10d91611f426 ("powerpc/64s: Reimplement book3s idle code in C")

[Ruediger Oertel]

Am 31.08.20 um 14:58 schrieb Michael Ellerman:
[...]
>> The machines are running in OPAL/PowerNV mode, with "ppc64_cpu --smt=off".
>> The number of VMs varies across the machines:
>> obs-power8-01: 18 instances, "-smp 16,threads=8"
>> obs-power8-02: 20 instances, "-smp 8,threads=8"
>> obs-power8-03: 30 instances, "-smp 8,threads=8"
>> obs-power8-04: 20 instances, "-smp 8,threads=8"
> 
> Can you send us the output of:
> 
> # grep . /sys/module/kvm_hv/parameters/*

of course, the current values are:

/sys/module/kvm_hv/parameters/dynamic_mt_modes:6
/sys/module/kvm_hv/parameters/h_ipi_redirect:1
/sys/module/kvm_hv/parameters/indep_threads_mode:Y
/sys/module/kvm_hv/parameters/kvm_irq_bypass:1
/sys/module/kvm_hv/parameters/nested:Y
/sys/module/kvm_hv/parameters/one_vm_per_core:N
/sys/module/kvm_hv/parameters/target_smt_mode:0

(actually identical on all 5 above)

-- 
with kind regards (mit freundlichem Grinsen),
  Ruediger Oertel (ro at suse.com,ro at suse.de,bugfinder at t-online.de)
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