Commit 5263f0a8 authored Dec 20, 2013 by Linus Torvalds

Merge tag 'trace-fixes-v3.13-rc2' of...

Merge tag 'trace-fixes-v3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull ftrace fix from Steven Rostedt:
 "This fixes a long standing bug in the ftrace profiler.  The problem is
  that the profiler only initializes the online CPUs, and not possible
  CPUs.  This causes issues if the user takes CPUs online or offline
  while the profiler is running.

  If we online a CPU after starting the profiler, we lose all the trace
  information on the CPU going online.

  If we offline a CPU after running a test and start a new test, it will
  not clear the old data from that CPU.

  This bug causes incorrect data to be reported to the user if they
  online or offline CPUs during the profiling"

* tag 'trace-fixes-v3.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace: Initialize the ftrace profiler for each possible cpu

parents f7556698 c4602c1c

kernel/trace/ftrace.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -775,7 +775,7 @@ static int ftrace_profile_init(void)
		int cpu;
		int ret = 0;

		for_each_online_cpu(cpu) {
		for_each_possible_cpu(cpu) {
		ret = ftrace_profile_init_cpu(cpu);
		if (ret)
		break;

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