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Bug 1906323 - Libvirt failed to set schedinfo cpushares or global_quota after "systemctl daemon-reload"
Summary: Libvirt failed to set schedinfo cpushares or global_quota after "systemctl da...
Keywords:
Status: CLOSED DUPLICATE of bug 1798463
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: libvirt
Version: 8.1
Hardware: x86_64
OS: Linux
unspecified
urgent
Target Milestone: rc
: 8.0
Assignee: Pavel Hrdina
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-12-10 09:30 UTC by Yanglei
Modified: 2020-12-14 09:27 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-12-14 09:27:30 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
libvirt xml (1.53 KB, text/plain)
2020-12-10 09:30 UTC, Yanglei 		no flags Details
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Description Yanglei 2020-12-10 09:30:23 UTC 
Created attachment 1738146 [details]
libvirt xml

Created attachment 1738146 [details]
libvirt xml

Description of problem:
Start a vm by virsh, the values of"virsh schedinfo xx --set global_quota/cpu_shares" would change into previous one after systemctl daemon-reload.
I guess that maybe the same reason as Bug1789824.

Version-Release number of selected component (if applicable):
systemd-239-18.el8.x86_64
libvirt-4.5.0.35

How reproducible:
Consistently reproducible

Steps to Reproduce:
1. Start a vm and "virsh schedinfo <domain>"
2. "virsh schedinfo <domain> --set cpu.shares=2048"
3. "virsh schedinfo <domain>"
4. "systemctl daemon-reload"
5. "virsh schedinfo <domain>"

Actual results:
1. start vm successfully, and get an initial value of cpu.shares
2. no error
3. get a value of cpu.shares 2048
4. no error
5. cpu.shares was changed into initial value

Expected results:
1. start vm successfully, and get an initial value of cpu.shares
2. no error
3. get a value of cpu.shares 2048
4. no error
5. cpu.shares is the value newly setted

Additional info:
Im reviewing code of libvirt, It seems that libvirt misuse the Delegate= which was designed to delegate subtree's property to other programs, but not the property of scope/slice performing Delegate=.
I would like to test compling a libvirt that modified functions virCgroupSet*() into call systemctl api to tell systemd.
Comment 1 Pavel Hrdina 2020-12-14 09:27:30 UTC 

*** This bug has been marked as a duplicate of bug 1798463 ***
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