Merge tag 'docs-4.18' of git://git.lwn.net/linux

[sfrench/cifs-2.6.git] / Documentation / trace / ftrace.rst

diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
index 67d9c38e95eb54d2855bf356b6fccc0cace8442a..6b80ac4bbaae5a387416c563862bc2013e94fd59 100644 (file)
--- a/Documentation/trace/ftrace.rst
+++ b/Documentation/trace/ftrace.rst
@@ -224,6 +224,8 @@ of ftrace. Here is a list of some of the key files:
        has a side effect of enabling or disabling specific functions
        to be traced. Echoing names of functions into this file
        will limit the trace to only those functions.
+       This influences the tracers "function" and "function_graph"
+       and thus also function profiling (see "function_profile_enabled").
 
        The functions listed in "available_filter_functions" are what
        can be written into this file.
@@ -265,6 +267,8 @@ of ftrace. Here is a list of some of the key files:
        Functions listed in this file will cause the function graph
        tracer to only trace these functions and the functions that
        they call. (See the section "dynamic ftrace" for more details).
+       Note, set_ftrace_filter and set_ftrace_notrace still affects
+       what functions are being traced.
 
   set_graph_notrace:
 
@@ -277,7 +281,8 @@ of ftrace. Here is a list of some of the key files:
 
        This lists the functions that ftrace has processed and can trace.
        These are the function names that you can pass to
-       "set_ftrace_filter" or "set_ftrace_notrace".
+       "set_ftrace_filter", "set_ftrace_notrace",
+       "set_graph_function", or "set_graph_notrace".
        (See the section "dynamic ftrace" below for more details.)
 
   dyn_ftrace_total_info: