Bug 1641777

Summary:	High load in systemd when cups.path and cups.service is enabled
Product:	Red Hat Enterprise Linux 7	Reporter:	Zdenek Dohnal <zdohnal>
Component:	systemd	Assignee:	Jan Synacek <jsynacek>
Status:	CLOSED ERRATA	QA Contact:	Frantisek Sumsal <fsumsal>
Severity:	medium	Docs Contact:
Priority:	high
Version:	7.7	CC:	bmason, fsumsal, jsynacek, systemd-maint-list
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	systemd-219-73.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-31 20:02:09 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:
Bug Depends On:
Bug Blocks:	1477664, 1589388, 1618009, 1630905, 1716963, 1719445

Description Zdenek Dohnal 2018-10-22 17:58:02 UTC

Description of problem:
When I send many jobs for printing, then the machine experiences high load caused by systemd process. This behavior happens when cups.service and cups.path are both enabled and running.

Version-Release number of selected component (if applicable):
systemd-219-57.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
Scripts and steps how to reproduce are in https://bugzilla.redhat.com/show_bug.cgi?id=1589388

Actual results:
High load of systemd process

Expected results:
No high load

Additional info:
This issue is actually clone of https://bugzilla.redhat.com/show_bug.cgi?id=1589388 , which is reported on CUPS component. After talking with Michal Sekletar he proposed to create separate bug for investigating, if it is really systemd issue or only cups issue.

Comment 2 Jan Synacek 2018-10-24 06:44:59 UTC

Looking at some performance data I've collected on my testing system, most of the cpu time is actually spent in the kernel, no matter if the PathExistsGlob= matches or not. I'm going to follow up with real data and analysis.

Comment 3 Jan Synacek 2018-10-24 11:25:09 UTC

https://github.com/systemd/systemd/issues/10503

Comment 5 Zdenek Dohnal 2018-12-03 12:50:02 UTC

*** Bug 1589388 has been marked as a duplicate of this bug. ***

Comment 8 Jan Synacek 2019-09-17 13:26:21 UTC

https://github.com/systemd/systemd/pull/13509/

Comment 10 Jan Synacek 2019-09-18 08:24:53 UTC

https://github.com/systemd-rhel/rhel-7/pull/44

Comment 12 Lukáš Nykrýn 2019-10-25 08:58:33 UTC

fix merged to github master branch -> https://github.com/systemd-rhel/rhel-7/pull/44 -> post

Comment 16 errata-xmlrpc 2020-03-31 20:02:09 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1117