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Bug 1906323

Summary: Libvirt failed to set schedinfo cpushares or global_quota after "systemctl daemon-reload"
Product: Red Hat Enterprise Linux 8 Reporter: Yanglei <yanglei0385>
Component: libvirtAssignee: Pavel Hrdina <phrdina>
Status: CLOSED DUPLICATE QA Contact: Virtualization Bugs <virt-bugs>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 8.1CC: virt-maint
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: 8.0   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-12-14 09:27:30 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
libvirt xml none

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 ***