GS/Mutter: Real Time Scheduler

I have Silverblue Rawhide with last developement versions of Gnome Shell and Mutter installed.
I have tried to enable rt-scheduler ( by:

$ gsettings set org.gnome.mutter experimental-features “[‘rt-scheduler’]”

$ setcap CAP_SYS_NICE=+ep /usr/bin/gnome-shell
unable to set CAP_SETFCAP effective capability: Operation not permitted

How to do it properly?

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I don’t think you can setcap because /usr is read only. You can run rpm-ostree usroverlay if you don’t mind the setcap being lost next boot.

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It is a pity that we can not set it permanently in Silverblue.