Stuttering in (at least) X11 while writing to swap
Lately I've noticed that the UI of the entire desktop tends freeze briefly whenever data is being written to swap memory. During the freeze, keyboard input is queued and takes effect once the freeze ends, which makes this less bad than it could be. However, mouse input (movement and clicks) are lost, which is irritating.
This happened in GNOME 3.32 + Fedora 30, and continues to happen in GNOME 3.34 + Fedora 31.