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authorStefan Assmann <sassmann@redhat.com>2009-10-12 16:17:21 -0400
committerFrederic Weisbecker <fweisbec@gmail.com>2009-10-12 16:17:21 -0400
commit369bc18f9a6c4e2686204c1d7476ab684a720968 (patch)
tree84606ab4244907d10b60fb091f2d2e23024ebbae /Documentation/kernel-parameters.txt
parent3c355863fb32070a2800f41106519c5c3038623a (diff)
ftrace: add kernel command line graph function filtering
Add a command line parameter to allow limiting the function graphs that are traced on boot up from the given top-level callers , when ftrace=function_graph is specified. This patch adds the following command line option: ftrace_graph_filter=function-list Where function-list is a comma separated list of functions to filter. [fweisbec@gmail.com: picked the documentation changes from the v2 patch] Signed-off-by: Stefan Assmann <sassmann@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <4AD2DEB9.2@redhat.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 6fa7292947e5..1dc4b9cc20e5 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -778,6 +778,13 @@ and is between 256 and 4096 characters. It is defined in the file
778 by the set_ftrace_notrace file in the debugfs 778 by the set_ftrace_notrace file in the debugfs
779 tracing directory. 779 tracing directory.
780 780
781 ftrace_graph_filter=[function-list]
782 [FTRACE] Limit the top level callers functions traced
783 by the function graph tracer at boot up.
784 function-list is a comma separated list of functions
785 that can be changed at run time by the
786 set_graph_function file in the debugfs tracing directory.
787
781 gamecon.map[2|3]= 788 gamecon.map[2|3]=
782 [HW,JOY] Multisystem joystick and NES/SNES/PSX pad 789 [HW,JOY] Multisystem joystick and NES/SNES/PSX pad
783 support via parallel port (up to 5 devices per port) 790 support via parallel port (up to 5 devices per port)