Unable to put offline CPU back online on Bionic/B-hwe-edge P9
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
The Ubuntu-power-systems project |
Invalid
|
High
|
bugproxy | ||
linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned |
Bug Description
You will see these CPUs in offline state after boot.
ubuntu@baltar:~$ cat /sys/devices/
156-159
ubuntu@baltar:~$ echo 1 | sudo tee /sys/devices/
1
tee: /sys/devices/
ubuntu@baltar:~$ echo 1 | sudo tee /sys/devices/
1
tee: /sys/devices/
ubuntu@baltar:~$ echo 1 | sudo tee /sys/devices/
1
tee: /sys/devices/
ubuntu@baltar:~$ echo 1 | sudo tee /sys/devices/
1
tee: /sys/devices/
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-
ProcVersionSign
Uname: Linux 5.0.0-14-generic ppc64le
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: ppc64el
Date: Thu May 2 06:46:36 2019
ProcLoadAvg: 0.00 0.00 0.00 1/1298 6496
ProcSwaps:
Filename Type Size Used Priority
/swap.img file 8388544 0 -2
ProcVersion: Linux version 5.0.0-14-generic (buildd@
SourcePackage: linux-signed-
UpgradeStatus: No upgrade log present (probably fresh install)
VarLogDump_list: total 0
cpu_cores: Number of cores present = 40
cpu_coreson: Number of cores online = 39
cpu_dscr: DSCR is 16
cpu_freq:
min: 2.862 GHz (cpu 79)
max: 2.945 GHz (cpu 81)
avg: 2.903 GHz
cpu_runmode:
Could not retrieve current diagnostics mode,
No kernel interface to firmware
cpu_smt: SMT=4
description: | updated |
Changed in ubuntu-power-systems: | |
importance: | Undecided → High |
assignee: | nobody → bugproxy (bugproxy) |
tags: | added: architecture-ppc64le bugnameltc-177392 severity-high targetmilestone-inin--- |
tags: |
added: bugnameltc-177393 removed: bugnameltc-177392 |
tags: |
added: bugnameltc-177392 removed: bugnameltc-177393 |
Changed in ubuntu-power-systems: | |
status: | Fix Committed → Confirmed |
Changed in linux (Ubuntu): | |
status: | Fix Committed → Confirmed |
tags: |
added: bugnameltc-177393 removed: bugnameltc-177392 |
This issue can be reproduced with 4.15 Bionic as well.
However, I can't see any CPU in offline state for a 4.15 Bionic P8 node after boot.