Bug 501879

Summary:	Memory Leak with Kioworker
Product:	[Frameworks and Libraries] frameworks-kio	Reporter:	Leona <zeebie>
Component:	general	Assignee:	KIO Bugs <kio-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	anhollander516, kdelibs-bugs-null, nate
Priority:	NOR
Version First Reported In:	6.12.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Dolphin left Idle. Replication after update

Description Leona 2025-03-22 19:17:11 UTC

SUMMARY
There appears to be a memory leak in the kioworker process that causes increasing memory usage over time without it being released, impacting system performance until targeted by OOM Killer and terminated

STEPS TO REPRODUCE

Use Dolphin to perform file system operations, specifically accessing SMB shares and performing searches for specific files.

Monitor the memory usage of the kioworker process using a system monitor tool like htop or top.

Observe the increasing memory consumption by kioworker that is not released even after tasks are completed.

OBSERVED RESULT
The kioworker process steadily consumes more memory over time without releasing it, leading to a noticeable memory leak.

EXPECTED RESULT
The kioworker process should release memory after completing its task, maintaining stable memory usage without excessive growth.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Garuda Linux 
KDE Plasma Version: plasmashell 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION

The issue is primarily observed during regular file operations in Dolphin while accessing networked shares via SMB.

Memory leak is not immediately apparent but becomes noticeable after extended usage.

The process does not seem to release memory after completing tasks like file transfers or searches.

─λ journalctl -xe | grep -i "killed process"

Mar 23 04:45:19  kernel: Out of memory: Killed process 4010253 (kioworker) total-vm:102261920kB, anon-rss:45431184kB, file-rss:2232kB, shmem-rss:0kB, UID:1000 pgtables:199964kB oom_score_adj:200


sudo netstat -tunp | grep kioworker

tcp        0      0 192.168.20.75:32968     192.168.20.26:445       ESTABLISHED 139478/kioworker
tcp        0    232 192.168.20.75:32972     192.168.20.26:445       ESTABLISHED 139480/kioworker
tcp        0      0 192.168.20.75:32926     192.168.20.26:445       ESTABLISHED 139458/kioworker
tcp        0      0 192.168.20.75:32954     192.168.20.26:445       ESTABLISHED 139482/kioworker
tcp        0      0 192.168.20.75:32938     192.168.20.26:445       ESTABLISHED 139439/kioworker
tcp        0    109 192.168.20.75:32982     192.168.20.26:445       ESTABLISHED 139476/kioworker

Comment 1 Leona 2025-03-22 19:52:52 UTC

Created attachment 179648 [details]
Dolphin left Idle.

Attempted to replicate to get additional evidence of issue. Performed a search for Xenia.log on SMB share. Came back later and memory usage was high, afterwards  terminated dolphin and memory was released.

Comment 2 Avraham Hollander 2025-03-26 01:34:23 UTC

Your system is quite out of date, missing Plasma 6.3.3 and Frameworks 6.12. Please update and see if the bug is still present.

Comment 3 Leona 2025-03-26 04:16:36 UTC

Created attachment 179741 [details]
Replication after update

Have updated as requested to Plasma 6.3.3 and Frameworks 6.12 and re-tested. Issue was replicated.

Comment 4 Avraham Hollander 2025-03-26 04:33:34 UTC

(In reply to Leona from comment #3)
> Created attachment 179741 [details]
> Replication after update
> 
> Have updated as requested to Plasma 6.3.3 and Frameworks 6.12 and re-tested.
> Issue was replicated.

I'll try to reproduce this on a clean Garuda and Arch installation when I get the chance. To clarify, I should set up a Samba share with a decently sized directory tree and browse around and do different searches without closing Dolphin to cause the leak?

Comment 5 Bug Janitor Service 2025-04-10 03:46:56 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!

Comment 6 Bug Janitor Service 2025-04-25 03:47:29 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.