Standard_A2_v2 Azure instance will have CPU in offline state

Bug #1831543 reported by Po-Hsu Lin on 2019-06-04
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubuntu-kernel-tests
Undecided
Unassigned
linux-azure (Ubuntu)
Undecided
Unassigned

Bug Description

This needs to be investigated to see if it's been disabled intentionally.
The cpu-hot-plug test shows there are 126 offlined CPUs.

 selftests: cpu-on-off-test.sh
 ========================================
 pid 9824's current affinity mask: 3
 pid 9824's new affinity mask: 1
 CPU online/offline summary:
 present_cpus = 0-1 present_max = 1
 Cpus in online state: 0-1
 Cpus in offline state: 2-127
 Limited scope test: one hotplug cpu
 (leaves cpu in the original state):
 online to offline to online: cpu 1
 not ok 1..1 selftests: cpu-on-off-test.sh [FAIL]

Po-Hsu Lin (cypressyew) on 2019-06-05
tags: added: azure
Po-Hsu Lin (cypressyew) on 2019-09-17
tags: added: ubuntu-kernel-selftests
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