commit ccef9153da1484949ed4633e96fd9a92f932264c
author Sam Lantinga <slouken@libsdl.org> Wed Oct 12 22:34:54 2016 -0700
committer Sam Lantinga <slouken@libsdl.org> Wed Oct 12 22:34:54 2016 -0700
tree ae5529729a70c2a18ede8ec88c847cc93c13dde9
parent b54bd4a800e51f73b9a384b818aeb5d4cb56754a

Added a note on how to allow non-root applications to increase their thread priority on Linux

src/thread/pthread/SDL_systhread.c

diff --git a/src/thread/pthread/SDL_systhread.c b/src/thread/pthread/SDL_systhread.c
index 79d6543..05384ab 100644
--- a/src/thread/pthread/SDL_systhread.c
+++ b/src/thread/pthread/SDL_systhread.c
@@ -199,6 +199,10 @@
     if (setpriority(PRIO_PROCESS, syscall(SYS_gettid), value) < 0) {
         /* Note that this fails if you're trying to set high priority
            and you don't have root permission. BUT DON'T RUN AS ROOT!
+
+           You can grant the ability to increase thread priority by
+           running the following command on your application binary:
+               sudo setcap 'cap_sys_nice=eip' <application>
          */
         return SDL_SetError("setpriority() failed");
     }