manjaro gnome 42.2 CoverflowAltTab@dmo60.de Memory overflow

[puzzle9]

5 hours after start-up

When I close the CoverflowAltTab extension

[puzzle9]

● user@1000.service - User Manager for UID 1000
     Loaded: loaded (/usr/lib/systemd/system/user@.service; static)
     Active: active (running) since Tue 2022-06-21 20:09:29 CST; 4h 59min ago
       Docs: man:user@.service(5)
   Main PID: 2899 (systemd)
     Status: "Ready."
      Tasks: 921
     Memory: 19.3G
        CPU: 2h 1min 35.778s
     CGroup: /user.slice/user-1000.slice/user@1000.service

[puzzle9]

[dsheeler]

Maybe try this with all other extensions disabled and check for same memory issue? I haven't had an issue with memory, and I just disabled it with no incident. Not sure what the extension could be doing so wrong!

[WanWizard]

I did, and I can confirm this.

With only this extension installed, and with only few terminal windows (one with with top) open, if I press and hold alt-tab to continuously cycle through the windows, I can see the memory usage in top steadily increase, until the systemd OOM killer steps in and kills gnome-shell.

I've been using this extension for quite a while (thanks !), but this problem only started recently, either when I upgraded to Fedora 36 (which introduced gnome 42), or during a subsequent update (now running 42.3).

[machitgarha]

I cannot reproduce the issue with Gnome 42.2. Maybe I'm missing something, or it's introduced in 42.3?

[WanWizard]

I'm runnng Gnome 42.3, maybe the update to that version has triggered something?

For the moment I have assigned Alt-Tab to the Window switcher instead of the App Switcher so at least I have the functionality, and the laptop is stable as a rock again, no increasing memory usage anymore.

[machitgarha]

@WanWizard, just installed 42.3 and... no problems so far. What distribution do you use (mine is Fedora Workstation 36)? The problem is kind of weird.

[WanWizard]

I'm on Fedora 36, up to date. It puzzles me too, never had any issues until the last couple of weeks.

Maybe interesting: the problem also manifests itself when the laptop isn't used. It happened several times when I finished work, lock the laptop (but not suspend), and find gnome-shell killed by systemd-oomd the next morning.

[puzzle9]

when /usr/bin/gnome-shell run is nvidia can appear

# nvidia-smi 
Sat Aug 20 23:00:08 2022       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 515.65.01    Driver Version: 515.65.01    CUDA Version: 11.7     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  Off  | 00000000:01:00.0 Off |                  N/A |
| N/A   40C    P3     6W /  N/A |   2113MiB /  4096MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      1355      G   /usr/lib/Xorg                     256MiB |
|    0   N/A  N/A      1445      G   /usr/bin/gnome-shell             1856MiB |
+-----------------------------------------------------------------------------+

[hackerb9]

I'm runnng Gnome 42.3, maybe the update to that version has triggered something?

I am experiencing a memory leak with version 43.1 (using Debian testing/bookworm). "Solved" it by disabling CoverflowAltTab, but that's not ideal.

I had never seen this problem on my previous laptop which ran Debian stable/bullseye and Gnome 3.38.6. It also was running Linux 5.10.0 (instead of 6.0.8) and X11 (instead of Wayland).