summaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
authorTodd Brandt <todd.e.brandt@linux.intel.com>2017-03-02 16:12:15 -0800
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-03-03 09:45:01 -0500
commit65a50c656276b0846bea09dd011c0a3d35b77f3e (patch)
treef75fe3c818f323dc288fca8ba60dbdcf3b2db2a4 /Documentation
parentbf7165cfa23695c51998231c4efa080fe1d3548d (diff)
downloadlinux-65a50c656276b0846bea09dd011c0a3d35b77f3e.tar.gz
linux-65a50c656276b0846bea09dd011c0a3d35b77f3e.tar.bz2
linux-65a50c656276b0846bea09dd011c0a3d35b77f3e.zip
ftrace/graph: Add ftrace_graph_max_depth kernel parameter
Early trace callgraphs can be extremely large on systems with several seconds of boot time. The max_depth parameter limits how deep the graph trace goes and reduces the output size. This parameter is the same as the max_graph_depth file in tracefs. Link: http://lkml.kernel.org/r/1488499935-23216-1-git-send-email-todd.e.brandt@linux.intel.com Signed-off-by: Todd Brandt <todd.e.brandt@linux.intel.com> [ changed comments about debugfs to tracefs ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 21e2d8863705..1c9016b27ee9 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1173,6 +1173,12 @@
functions that can be changed at run time by the
set_graph_notrace file in the debugfs tracing directory.
+ ftrace_graph_max_depth=<uint>
+ [FTRACE] Used with the function graph tracer. This is
+ the max depth it will trace into a function. This value
+ can be changed at run time by the max_graph_depth file
+ in the tracefs tracing directory. default: 0 (no limit)
+
gamecon.map[2|3]=
[HW,JOY] Multisystem joystick and NES/SNES/PSX pad
support via parallel port (up to 5 devices per port)