genirq: Set irq thread to RT priority on creation
authorIvo Sieben <meltedpianoman@gmail.com>
Mon, 3 Jun 2013 10:12:02 +0000 (12:12 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Tue, 11 Jun 2013 14:18:50 +0000 (16:18 +0200)
commitee23871389d51e07380d23887333622fbe7d3dd9
tree729b38096a39a2e9ff318149c40a6ca53199707e
parent9dbd90f17e4f380593ec5194c2a4d5e52c5f72d1
genirq: Set irq thread to RT priority on creation

When a threaded irq handler is installed the irq thread is initially
created on normal scheduling priority. Only after the irq thread is
woken up it sets its priority to RT_FIFO MAX_USER_RT_PRIO/2 itself.

This means that interrupts that occur directly after the irq handler
is installed will be handled on a normal scheduling priority instead
of the realtime priority that one would expect.

Fix this by setting the RT priority on creation of the irq_thread.

Signed-off-by: Ivo Sieben <meltedpianoman@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1370254322-17240-1-git-send-email-meltedpianoman@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
kernel/irq/manage.c