1 files changed, 29 insertions, 0 deletions
diff --git a/x11-toolkits/como/files/patch-como_base_wayland_app__singleton.h b/x11-toolkits/como/files/patch-como_base_wayland_app__singleton.h
new file mode 100644
index 000000000000..74214de3cf54
--- /dev/null
+++ b/x11-toolkits/como/files/patch-como_base_wayland_app__singleton.h
@@ -0,0 +1,29 @@
+Allow using mac_priority(4) to avoid stutter during high load:
+- Emulate SCHED_RESET_ON_FORK via pthread_atfork
+- Switch to pthread_setschedparam as Linux sched_setscheduler
+  operates on threads contrary to POSIX
+
+Similar to picom, sway, hyprland. Also plasma6-kwin but not fixed yet.
+
+--- como/base/wayland/app_singleton.h.orig	2024-02-27 13:02:31 UTC
++++ como/base/wayland/app_singleton.h
+@@ -19,12 +19,16 @@ class app_singleton : public base::app_singleton (publ
+         setenv("QT_QPA_PLATFORM", "wayland-org.kde.kwin.qpa", true);
+         setenv("KWIN_FORCE_OWN_QPA", "1", true);
+ 
+-#if HAVE_SCHED_RESET_ON_FORK
+         int const minPriority = sched_get_priority_min(SCHED_RR);
+         sched_param sp;
+         sp.sched_priority = minPriority;
+-        sched_setscheduler(0, SCHED_RR | SCHED_RESET_ON_FORK, &sp);
+-#endif
++        if (!pthread_setschedparam(pthread_self(), SCHED_RR, &sp)) {
++            pthread_atfork(NULL, NULL, []() {
++                sched_param sp;
++                sp.sched_priority = 0;
++                pthread_setschedparam(pthread_self(), SCHED_OTHER, &sp);
++            });
++        }
+ 
+         qapp = std::make_unique<QApplication>(argc, argv);
+         prepare_qapp();