2020-09-02 06:29:17 |
bugproxy |
bug |
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added bug |
2020-09-02 06:29:19 |
bugproxy |
tags |
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architecture-ppc64le bugnameltc-187995 severity-critical targetmilestone-inin16046 |
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2020-09-02 06:29:20 |
bugproxy |
ubuntu: assignee |
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Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) |
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2020-09-02 06:29:25 |
bugproxy |
affects |
ubuntu |
kernel-package (Ubuntu) |
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2020-09-02 06:50:11 |
Frank Heimes |
affects |
kernel-package (Ubuntu) |
linux (Ubuntu) |
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2020-09-02 06:50:41 |
Frank Heimes |
bug task added |
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ubuntu-power-systems |
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2020-09-02 06:51:09 |
Frank Heimes |
ubuntu-power-systems: assignee |
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Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) |
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2020-09-02 07:00:13 |
Frank Heimes |
nominated for series |
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Ubuntu Xenial |
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2020-09-02 07:00:13 |
Frank Heimes |
bug task added |
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linux (Ubuntu Xenial) |
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2020-09-02 07:00:13 |
Frank Heimes |
nominated for series |
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Ubuntu Groovy |
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2020-09-02 07:00:13 |
Frank Heimes |
bug task added |
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linux (Ubuntu Groovy) |
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2020-09-02 07:00:13 |
Frank Heimes |
nominated for series |
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Ubuntu Bionic |
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2020-09-02 07:00:13 |
Frank Heimes |
bug task added |
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linux (Ubuntu Bionic) |
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2020-09-02 07:00:13 |
Frank Heimes |
nominated for series |
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Ubuntu Focal |
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2020-09-02 07:00:13 |
Frank Heimes |
bug task added |
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linux (Ubuntu Focal) |
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2020-09-02 07:00:24 |
Frank Heimes |
linux (Ubuntu Groovy): status |
New |
Fix Released |
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2020-09-02 07:02:00 |
Frank Heimes |
ubuntu-power-systems: importance |
Undecided |
Critical |
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2020-09-09 16:27:28 |
Andrew Cloke |
ubuntu-power-systems: assignee |
Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) |
Patricia Domingues (patriciasd) |
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2020-09-09 16:27:32 |
Andrew Cloke |
ubuntu-power-systems: status |
New |
In Progress |
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2020-09-14 15:17:42 |
Patricia Domingues |
description |
== Comment: #0 - VASANT HEGDE <hegdevasant@in.ibm.com> - 2020-09-02 01:00:25 ==
--Problem Description---
Do not initiate shutdown for EPOW_SHUTDOWN_ON_UPS event. Instead wait for predefined time before initiating shtudown.
Contact Information = Vasant hegde <hegdevasant@linux.vnet.ibm.com?
---uname output---
Ubuntu 16.04
Machine Type = All Power System
Upstream commit :
commit 90a9b102eddf6a3f987d15f4454e26a2532c1c98
Author: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Date: Thu Aug 20 11:48:44 2020 +0530
powerpc/pseries: Do not initiate shutdown when system is running on UPS
Note that I have requested this fix for upstream v4.4 stable tree. This will hit stable tree soon.
This is impacting all kernel after v4.0. This is critical fix. Hence I'd like to request to backport to Ubuntu 16.04 LTS release.
-Vasant |
SRU Justification:
[Impact]
* With commit 79872e35469b "powerpc/pseries: All events of EPOW_SYSTEM_SHUTDOWN must initiate shutdown" it was introduced that all EPOW_SYSTEM_SHUTDOWN events cause immediate shutdowns.
* But on LPARs there is a user space tool (rtas_errd) that monitor for EPOW_SHUTDOWN_ON_UPS events.
* Once rtas_errd gets an event it initiates a shutdown after predefined time.
* Therefore immediate shutdowns must not be triggered if the system is running on UPS (means for EPOW_SHUTDOWN_ON_UPS events).
[Fix]
* 90a9b102eddf6a3f987d15f4454e26a2532c1c98 90a9b102eddf "powerpc/pseries: Do not initiate shutdown when system is running on UPS"
[Test Case]
* Setup a Power system on (D)LPAR and run it on UPS with Ubuntu 16.04 or higher (kernel 4.x is needed).
* Verify that the user space tool (rtas_errd) is active and running.
* Define a time for a potential shutdown in case an EPOW_SHUTDOWN_ON_UPS event occurs.
* Trigger an EPOW_SHUTDOWN_ON_UPS event.
* Verify if the system got shutdown immediately - or after the pre-defined time.
[Regression Potential]
* The regression risk is very low, because of the very limited modification in a case statement for EPOW_SHUTDOWN_ON_UPS events.
* What may happen is that the system doesn't power off anymore if running on UPS due to the EPOW_SHUTDOWN_ON_UPS case changes - especially if there is a potential problem with rtas_errd that should monitor for these events and should initiate the delayed shutdown.
* Other than that I cannot see much potential harm.
[Other]
* The patch got upstream accepted in v5.9-rc2 and already landed in groovy's kernel 'Ubuntu-5.8.0-18.19', based on the v5.8.4 upstream stable release ticket LP 1893048. |
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2020-09-16 05:28:07 |
Frank Heimes |
linux (Ubuntu Xenial): status |
New |
In Progress |
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2020-09-16 05:28:10 |
Frank Heimes |
linux (Ubuntu Bionic): status |
New |
In Progress |
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2020-09-16 05:28:14 |
Frank Heimes |
linux (Ubuntu Focal): status |
New |
In Progress |
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2020-09-16 05:28:30 |
Frank Heimes |
linux (Ubuntu Groovy): assignee |
Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) |
Canonical Kernel Team (canonical-kernel-team) |
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2020-09-16 05:28:41 |
Frank Heimes |
linux (Ubuntu Focal): assignee |
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Canonical Kernel Team (canonical-kernel-team) |
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2020-09-16 05:28:46 |
Frank Heimes |
linux (Ubuntu Groovy): assignee |
Canonical Kernel Team (canonical-kernel-team) |
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2020-09-16 05:28:54 |
Frank Heimes |
linux (Ubuntu Bionic): assignee |
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Canonical Kernel Team (canonical-kernel-team) |
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2020-09-16 05:29:06 |
Frank Heimes |
linux (Ubuntu Xenial): assignee |
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Canonical Kernel Team (canonical-kernel-team) |
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2020-09-17 21:03:46 |
Kelsey Steele |
linux (Ubuntu Bionic): status |
In Progress |
Fix Committed |
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2020-09-17 21:03:48 |
Kelsey Steele |
linux (Ubuntu Focal): status |
In Progress |
Fix Committed |
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2020-09-17 21:03:50 |
Kelsey Steele |
linux (Ubuntu Xenial): status |
In Progress |
Fix Committed |
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2020-09-18 04:30:36 |
Frank Heimes |
ubuntu-power-systems: status |
In Progress |
Fix Committed |
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2020-10-14 10:25:01 |
Frank Heimes |
linux (Ubuntu Focal): status |
Fix Committed |
Fix Released |
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2020-10-14 10:25:04 |
Frank Heimes |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
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2020-10-14 10:25:08 |
Frank Heimes |
linux (Ubuntu Xenial): status |
Fix Committed |
Fix Released |
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2020-10-14 10:25:13 |
Frank Heimes |
ubuntu-power-systems: status |
Fix Committed |
Fix Released |
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