Commit eaf260ac authored Jul 06, 2017 by Joel Fernandes Committed by Steven Rostedt (VMware) Jul 07, 2017

tracing: Treat recording comm for idle task as a success

Currently we stop recording comm for non-idle tasks when switching from/to idle
task since we treat that as a record failure. Fix that by treat recording of
comm for idle task as a success.

Link: http://lkml.kernel.org/r/20170706230023.17942-1-joelaf@google.com

Cc: kernel-team@android.com
Cc: Ingo Molnar <mingo@redhat.com>
Reported-by: Michael Sartain <mikesart@gmail.com>
Signed-off-by: Joel Fernandes <joelaf@google.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

parent 99c621d7

kernel/trace/trace.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -1916,7 +1916,11 @@ static int trace_save_cmdline(struct task_struct *tsk)
		{
		unsigned pid, idx;

		if (!tsk->pid \|\| unlikely(tsk->pid > PID_MAX_DEFAULT))
		/* treat recording of idle task as a success */
		if (!tsk->pid)
		return 1;

		if (unlikely(tsk->pid > PID_MAX_DEFAULT))
		return 0;

		/*