[Bug 1805841] Comment bridged from LTC Bugzilla
bugproxy
bugproxy at us.ibm.com
Fri Mar 8 13:39:27 UTC 2019
------- Comment From cborntra at de.ibm.com 2019-03-08 08:36 EDT-------
ping. Any progress on the minimal fix for now?
--
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to s390-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1805841
Title:
CPI information about kvm usage is lost during apt upgrade
Status in Ubuntu on IBM z Systems:
Triaged
Status in s390-tools package in Ubuntu:
New
Bug description:
---Problem Description---
CPI information about kvm usage is lost during apt upgrade
---uname output---
4.15.0-42-generic
Machine Type = s390x lpar
---Steps to Reproduce---
# cat /sys/firmware/cpi/*
cat: /sys/firmware/cpi/set: Permission denied
0x0000000000040f00
LINUX
root at m83lp52:~# virsh start guest # starting a guest does set the highest bit in
/sys/firmware/cpi/system_leveln
root at m83lp52:~# cat /sys/firmware/cpi/*
cat: /sys/firmware/cpi/set: Permission denied
0x8000000000040f00 <---- see the 8
LINUX
root at m83lp52:~# apt upgrade
[....]
has to upgrade at least one package, that will trigger some other code.
[....]
Now. some other code seems to have set values in /sys/firmware/cpi as
well dropping the kvm information.
root at m83lp52:~# cat /sys/firmware/cpi/*
cat: /sys/firmware/cpi/set: Permission denied
18 04 1
0x0000000000040f00
UBUNTU
LINUX
The canonical place to handle /sys/firmware/cpi should be /lib/s390-tools/cpictl and /lib/systemd/system/cpi.service. So can we put the additional features (setting 18 04 1 and UBUNTU things also into
/etc/sysconfig/cpi
or
/lib/s390-tools/cpictl
)
and can we disable the other code that also sets /sys/firmware/cpi (I have not found out which code sets these values). This seems to be /lib/systemd/system-generators/s390-cpi-vars
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/1805841/+subscriptions
More information about the foundations-bugs
mailing list