https://bugs.kde.org/show_bug.cgi?id=461818
Bug ID: 461818
Summary: Excessive use of inotify instances in kate
Classification: Applications
Product: kate
Version: Git
Platform: Other
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: application
Assignee: kwrite-bugs-n...@kde.org
Reporter: matthew.li...@gmail.com
Target Milestone: ---
SUMMARY
Kate spawns many inotify instances.
STEPS TO REPRODUCE
1. Start Kate
2. Open some project
OBSERVED RESULT
Kate spawns 10-15 inotify instances
EXPECTED RESULT
Kate should limit the inotify instances as the default number of allowed
inotify instances per user is 127. Using multiple kate instances can easily use
up all the available instances causing numerous problems in other applications.
SOFTWARE/OS VERSIONS
Kate: 22.11.70
Linux/KDE Plasma: Ubuntu 22.04.1 LTS
(available in About System)
KDE Plasma Version: 5.24.6
KDE Frameworks Version: 5.100.0
Qt Version: 5.13.3
ADDITIONAL INFORMATION
I used the following script to investigate the issue:
https://github.com/fatso83/dotfiles/blob/master/utils/scripts/inotify-consumers
Below there is an example of the output. As you can see PyCharm uses 3217
watches, but only a singe instance. This is not a problem, since the
max_user_watches limit is quite large (65535).
On the other hand Kate uses 10+ watch instance for the 30+ files. This is a
problem, because the max_user_instances limit is only 128 by default. Running 3
kate instance uses up 30% of the available watch instances.
INOTIFY INSTANCES
WATCHES PER
COUNT PROCESS PID USER COMMAND
------------------------------------------------------------
3217 1 19116 pozsgai
/snap/pycharm-professional/306/bin/fsnotifier
92 4 3188 pozsgai /lib/systemd/systemd --user
78 1 3707 pozsgai /usr/libexec/xdg-desktop-portal-gtk
77 1 3646 pozsgai
/usr/libexec/xdg-desktop-portal-gnome
54 4 3731 pozsgai /usr/bin/kded5
37 12 80717 pozsgai
/home/pozsgai/projects/kde/build/kde/applications/kate/bin/kate
36 1 3227 pozsgai /usr/libexec/tracker-miner-fs-3
30 13 19236 pozsgai
/home/pozsgai/projects/kde/build/kde/applications/kate/bin/kate
29 14 28352 pozsgai
/home/pozsgai/projects/kde/build/kde/applications/kate/bin/kate
28 8 5511 pozsgai /opt/google/chrome/chrome
--enable-crashpad
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