Merge remote-tracking branch 'y2038/y2038'

[karo-tx-linux.git] / Documentation / trace / ftrace.txt

diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt
index ef621d34ba5bf7a5a3c2d570de2ebaecf0615cc0..f52f297cb40627a7d5855f04399977f304272e51 100644 (file)
--- a/Documentation/trace/ftrace.txt
+++ b/Documentation/trace/ftrace.txt
@@ -204,6 +204,12 @@ of ftrace. Here is a list of some of the key files:
 
        Have the function tracer only trace a single thread.
 
+  set_event_pid:
+
+       Have the events only trace a task with a PID listed in this file.
+       Note, sched_switch and sched_wake_up will also trace events
+       listed in this file.
+
   set_graph_function:
 
        Set a "trigger" function where tracing should start
@@ -2437,6 +2443,23 @@ The following commands are supported:
 
    echo '!writeback*:mod:ext3' >> set_ftrace_filter
 
+  Mod command supports module globbing. Disable tracing for all
+  functions except a specific module:
+
+   echo '!*:mod:!ext3' >> set_ftrace_filter
+
+  Disable tracing for all modules, but still trace kernel:
+
+   echo '!*:mod:*' >> set_ftrace_filter
+
+  Enable filter only for kernel:
+
+   echo '*write*:mod:!*' >> set_ftrace_filter
+
+  Enable filter for module globbing:
+
+   echo '*write*:mod:*snd*' >> set_ftrace_filter
+
 - traceon/traceoff
   These commands turn tracing on and off when the specified
   functions are hit. The parameter determines how many times the