[tip:perf/core] ftrace: Append wakeup_rt description of ftrace doc

[tip-bot for Geunsik Lim]

Commit-ID:  cdfb0d30e943f36c8a074a26c3d168a05bdbb372
Gitweb:     http://git.kernel.org/tip/cdfb0d30e943f36c8a074a26c3d168a05bdbb372
Author:     Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
AuthorDate: Wed, 8 Feb 2012 19:05:37 +0900
Committer:  Steven Rostedt <rostedt@xxxxxxxxxxx>
CommitDate: Mon, 13 Feb 2012 09:14:48 -0500

ftrace: Append wakeup_rt description of ftrace doc

Append and update the description about wakeup/wakeup_rt usage.

Link: http://lkml.kernel.org/r/1328695537-15081-2-git-send-email-geunsik.lim@xxxxxxxxx

Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
Signed-off-by: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 Documentation/trace/ftrace.txt |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index 1ebc24c..6f51fed 100644
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -226,6 +226,13 @@ Here is the list of current tracers that may be configured.
 	Traces and records the max latency that it takes for
 	the highest priority task to get scheduled after
 	it has been woken up.
+        Traces all tasks as an average developer would expect.
+
+  "wakeup_rt"
+
+        Traces and records the max latency that it takes for just
+        RT tasks (as the current "wakeup" does). This is useful
+        for those interested in wake up timings of RT tasks.
 
   "hw-branch-tracer"
 
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