Replace limits.d/00-cputime.conf with systemd/app.slice.d/90-cpulimit.conf

etc/security/limits.d/00-cputime.conf

@@ -1,8 +0,0 @@
-# TODO: I don't think I understand cpu time properly and I don't feel
-# qualified to judge how to restrict it. These numbers are taken from
-# "man limits.conf", although they were swapped and they didn't originally
-# blanket apply to asterisk.
-# My goal here would be workaround difficult Matrix clients and compliment
-# systemd-oomd, which handles the memory management.
-*	soft	cpu	5000
-*	hard	cpu	10000

etc/systemd/system/app.slice.d/90-cpuquota.conf

@@ -0,0 +1,7 @@
+# This file is intended to restrict all apps to 180 % CPU of dualcore, in
+# hopes of preventing system freezing to that. Memory is handled by
+# systemd-oomd.
+[Slice]
+CPUAccounting=true
+CPUQuota=180%
+# vim: filetype=systemd