Same effect with vmlinuz-3.12.14-rt23 even with WindowMaker. The fan turns on on no reaction of the OS without any special realtime privileges. The threads run at priority 0 and can't switch to TTY[0-6]. It's a recent mac book pro output of `lspci -v` attached. I have programmed a thread wrapper AgsThread with glib-object using pthreads. I'm syncing a tree and having a thread pool which adds threads to the tree at runtime. Finally my question, what is the state of realtime kernel thread safety? My application runs more or less stable with default debian kernel configuration. But getting real bad performance. On Sat, 2014-03-29 at 17:14 +0100, Joël Krähemann wrote: > Hi, my application freezed recent kernel: > > vmlinuz-3.12.13-rt21 > > http://sourceforge.net/p/ags/blog/2014/03/warning-freezed-gnulinux/ > > > Now I'm compiling vmlinuz-3.12.14-rt23 but as fully tickles > >