https://bugs.kde.org/show_bug.cgi?id=478457
Bug ID: 478457
Summary: kioslave5 process causes high IOwait and hangs dolphin
when browsing SMB share with hundreds of media files
Classification: Frameworks and Libraries
Product: frameworks-kio
Version: 5.111.0
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kio-bugs-n...@kde.org
Reporter: eddiecarswel...@yahoo.com
CC: kdelibs-b...@kde.org
Target Milestone: ---
SUMMARY
Whenever I browse to my media share, the kioslave5 process cause dolphin to be
nearly unresponsive (or in some cases, completely unresponsive) due to high CPU
and IOwait, presumably due to the attempt to generate thumbnail previews of the
media files contained on the share. For reference, this share has hundreds of
video files. One may also notice significant network bandwidth usage as the
kioslave5 process is reading through all these files.
This makes attempting to browse this share and do anything useful a rather
difficult task until that process is finally done with whatever its doing and
stops chewing up resources (and it sometimes never stops until I kill dolphin).
Similar behavior can be observed with a local media file when said file is
still being written to while dolphin/kioslave5 is presumably trying to read it.
Every update to the file seems to trigger an endless loop of re-reading the
file.
These are both (to me, at least) pointing to issues with how kioslave5 is
handling media files. It should never be able to cause high IOwait and grind
the system to a halt, nor cause unnecessary network IO to do its tasks. A naive
analysis would seem to suggest there are less invasive and resource intensive
ways to generate media previews, maybe with better caching of the results, a
longer refresh time before trying again, etc.
STEPS TO REPRODUCE
1. Mount a SMB share with a large number of media files (videos, etc.)
2. Ensure the preview pane is enabled (seems to be a contributor)
3. Browse the share with dolphin and attempt operations like rename, etc.
OBSERVED RESULT
Observe high IOwait and/or CPU from kioslave5 process and potential lag from
dolphin.
EXPECTED RESULT
Dolphin remains responsive, no high CPU/IOwait/Network from kioslave5 (media
previews still working).
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 38
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.111.0
Qt Version: 5.15.11
Dolphin: 23.08.3
ADDITIONAL INFORMATION
Log snippet when the issue occurs:
```
Dec 12 17:30:54 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:30:55 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:30:55 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:30:55 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:30:55 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:30:55 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:30:56 AfroThundr-XPS kioslave5[203579]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:30:56 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:10 AfroThundr-XPS chatterino[3453]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:21 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:21 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:21 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:22 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:22 AfroThundr-XPS kioslave5[203579]: libpng warning: known
incorrect sRGB profile
Dec 12 17:31:22 AfroThundr-XPS kioslave5[203579]: libpng warning: profile
matches sRGB but writing iCCP instead
Dec 12 17:31:30 AfroThundr-XPS kioslave5[203579]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:31:30 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:31 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:31 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:31 AfroThundr-XPS kioslave5[203579]: libpng warning: iCCP: known
incorrect sRGB profile
Dec 12 17:31:31 AfroThundr-XPS kioslave5[203579]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:31:31 AfroThundr-XPS kioslave5[203579]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:31:31 AfroThundr-XPS kioslave5[203579]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:31:31 AfroThundr-XPS kioslave5[203579]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:31:40 AfroThundr-XPS kioslave5[203579]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:31:40 AfroThundr-XPS kwin_wayland[3442]: kf.service.services: The
desktop entry file "/usr/share/applications/qemu.desktop" has Type=
"Application" but has no Exec field.
Dec 12 17:31:40 AfroThundr-XPS kioslave5[203820]: Not a JPEG file: starts with
0x89 0x50
Dec 12 17:31:40 AfroThundr-XPS kioslave5[203820]: Not a JPEG file: starts with
0x89 0x50
```
--
You are receiving this mail because:
You are watching all bug changes.
