Control: tag -1 confirmed Julien Muchembled <jm@jmuchemb.eu> writes: > After 17 days, the number of threads of /usr/bin/kwin_x11 process has > exceeded 2700 and it keeps increasing. At the beginning > of a session, the process starts with 34 threads. Interesting! Mine starts with only 11 threads. I wonder if this is hardware dependent? > I could find that such leak happens when viewing videos fullscreen e.g. with mpv. Can anyone reproduce it ? More precisely: > 1. start mpv without --fs -> thread count does not change > 2. switch to fullscreen -> usually -2 threads > 3. leaves fullscreen -> usually +17 threads > 4. exit mpv -> thread count does not change I was able to reproduce (with mpv 0.35.1-4), but going fullscreen didn't increase the kwin thread count on my system; however, exiting fullscreen consistently increased kwin's thread count by exactly two threads each time mpv leaves fullscreen. I would say "I'm horrified too!" but couldn't this be a new feature that is designed to limit media consumption? ;) > Such a leak is at least a severe issue for anyone like me who set a nproc limit to protect against fork-bombs, in particular because it causes mysterious process crashes. I only understood the problem when I wanted to build a software that spawned a lot of processes. It also makes nproc limiting quite unusable without restarting KDE from time to time. The good news is that one doesn't need to restart KDE. Try this: kwin --replace& > Version 4:5.27.2-2 was affected too. I previously had 4:5.24.4-1 and I'm almost sure it had no leak. That's not a terrible range to bisect, if it comes to that. > A few notes that may be specific to my setup: > - I do have a 4k intel display. And regularly, for less than 1s, the > display is corrupted. I haven't tried Wayland yet and I hope it will > fix it. Oh, maybe this is why yours has more threads than mine? Maybe it's resolution dependent? (I'm not familiar with kwin's source) > - I use mpv from deb-multimedia. For reference, please note that bugs must be reproducible with Debian alone, otherwise they may be marked invalid. > - mpv conf: vo = gpu Here is the config I confirmed with: hwdec=vaapi vo=gpu profile=gpu-hq > I couldn't find anything on bug.kde.org: should I forward ? Yes please :) Kind regards, Nicholas
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