ftrace: add kernel command line function filtering

[linux-block.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e87bdbfbcc75e236124a526d4456ddf3c6afc4e3..fcd3bfbe74e885499952161358a4740300a2de21 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -56,7 +56,6 @@ parameter is applicable:
        ISAPNP  ISA PnP code is enabled.
        ISDN    Appropriate ISDN support is enabled.
        JOY     Appropriate joystick support is enabled.
-       KMEMTRACE kmemtrace is enabled.
        LIBATA  Libata driver is enabled
        LP      Printer support is enabled.
        LOOP    Loopback device support is enabled.
@@ -752,12 +751,25 @@ and is between 256 and 4096 characters. It is defined in the file
                        ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
 
        ftrace=[tracer]
-                       [ftrace] will set and start the specified tracer
+                       [FTRACE] will set and start the specified tracer
                        as early as possible in order to facilitate early
                        boot debugging.
 
        ftrace_dump_on_oops
-                       [ftrace] will dump the trace buffers on oops.
+                       [FTRACE] will dump the trace buffers on oops.
+
+       ftrace_filter=[function-list]
+                       [FTRACE] Limit the functions traced by the function
+                       tracer at boot up. function-list is a comma separated
+                       list of functions. This list can be changed at run
+                       time by the set_ftrace_filter file in the debugfs
+                       tracing directory. 
+
+       ftrace_notrace=[function-list]
+                       [FTRACE] Do not trace the functions specified in
+                       function-list. This list can be changed at run time
+                       by the set_ftrace_notrace file in the debugfs
+                       tracing directory.
 
        gamecon.map[2|3]=
                        [HW,JOY] Multisystem joystick and NES/SNES/PSX pad
@@ -1054,15 +1066,6 @@ and is between 256 and 4096 characters. It is defined in the file
                        use the HighMem zone if it exists, and the Normal
                        zone if it does not.
 
-       kmemtrace.enable=       [KNL,KMEMTRACE] Format: { yes | no }
-                               Controls whether kmemtrace is enabled
-                               at boot-time.
-
-       kmemtrace.subbufs=n     [KNL,KMEMTRACE] Overrides the number of
-                       subbufs kmemtrace's relay channel has. Set this
-                       higher than default (KMEMTRACE_N_SUBBUFS in code) if
-                       you experience buffer overruns.
-
        kgdboc=         [HW] kgdb over consoles.
                        Requires a tty driver that supports console polling.
                        (only serial suported for now)