Ubuntu
linux-azure-edge package

cpu_hotplug test failed due to Permission denied

Bug #1814232 reported by Po-Hsu Lin
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubuntu-kernel-tests
Confirmed
Undecided
Unassigned
linux-azure-edge (Ubuntu)
New
Undecided
Unassigned

Bug Description

Node: Standard_D11_v2
Kernel: 4.18.0-1008.8~18.04.1

 TAP version 13
 selftests: cpu-hotplug: cpu-on-off-test.sh
 ========================================
 pid 9047's current affinity mask: 3
 pid 9047'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
19. 01/30 19:57:02 ERROR| utils:0153| [stderr] ./cpu-on-off-test.sh: line 96: /sys/devices/system/cpu/cpu1/online: Permission denied
20. 01/30 19:57:02 ERROR| utils:0153| [stderr] offline_cpu_expect_success 1: unexpected fail
 not ok 1..1 selftests: cpu-hotplug: cpu-on-off-test.sh [FAIL]

Po-Hsu Lin (cypressyew)
affects: linux-azure (Ubuntu) → linux-azure-edge (Ubuntu)
summary: - cpu_hot_plug test failed due to Permission denied
+ cpu_hotplug test failed due to Permission denied
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

This will need to CONFIG_HOTPLUG_CPU=y, which was not set on Azure kernel.

Will try to fix this upstream.

Changed in ubuntu-kernel-tests:
assignee: nobody → Po-Hsu Lin (cypressyew)
status: New → In Progress
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

BTW, the CONFIG_HOTPLUG_CPU for azure was disabled in bug 1776293

Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

CPU hotplug for Azure has been enabled in https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1821934

Po-Hsu Lin (cypressyew)
tags: added: azure ubuntu-kernel-selftests
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

Failed on AWS X-4.15 ARM64 (it's only failing on ARM64)

Changed in ubuntu-kernel-tests:
assignee: Po-Hsu Lin (cypressyew) → nobody
status: In Progress → Confirmed
tags: added: aws sru-20191111
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

BTW it's instance a1.large, and the error message is a bit different:

 selftests: cpu-on-off-test.sh
 ========================================
 pid 19403's current affinity mask: 3
 pid 19403'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: 0
 Limited scope test: one hotplug cpu
 (leaves cpu in the original state):
 online to offline to online: cpu 1
 ./cpu-on-off-test.sh: line 89: echo: write error: Input/output error
 online_cpu_expect_success 1: unexpected fail
 not ok 1..1 selftests: cpu-on-off-test.sh [FAIL]

Kelsey Steele (kelsey-steele)
tags: added: bionic sru-20200921
Kelsey Steele (kelsey-steele)
tags: added: 4.15
Kelsey Steele (kelsey-steele)
tags: added: sru-20210104
Revision history for this message
Kelsey Steele (kelsey-steele) wrote :

focal/hwe-5.8 : 5.8.0-51.57~20.04.1

21. 04/24 04:59:10 DEBUG| utils:0153| [stdout] # Limited scope test: one hotplug cpu
22. 04/24 04:59:10 DEBUG| utils:0153| [stdout] # (leaves cpu in the original state):
23. 04/24 04:59:10 DEBUG| utils:0153| [stdout] # online to offline to online: cpu 7
24. 04/24 04:59:10 DEBUG| utils:0153| [stdout] # ./cpu-on-off-test.sh: line 96: /sys/devices/system/cpu/cpu7/online: Permission denied
25. 04/24 04:59:10 DEBUG| utils:0153| [stdout] # offline_cpu_expect_success 7: unexpected fail
26. 04/24 04:59:10 DEBUG| utils:0153| [stdout] not ok 1 selftests: cpu-hotplug: cpu-on-off-test.sh # exit=1

tags: added: 5.8 focal hwe hwe-5.8 sru-20210412
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