- set_ftrace_filter : When dynamic ftrace is configured in, the
- code is dynamically modified to disable calling
- of the function profiler (mcount). This lets
- tracing be configured in with practically no overhead
- in performance. This also has a side effect of
- enabling or disabling specific functions to be
- traced. Echoing in names of functions into this
- file will limit the trace to only these functions.
-
- set_ftrace_notrace: This has the opposite effect that
- set_ftrace_filter has. Any function that is added
- here will not be traced. If a function exists
- in both set_ftrace_filter and set_ftrace_notrace,
- the function will _not_ be traced.
+ set_ftrace_filter : When dynamic ftrace is configured in (see the
+ section below "dynamic ftrace"), the code is dynamically
+ modified (code text rewrite) to disable calling of the
+ function profiler (mcount). This lets tracing be configured
+ in with practically no overhead in performance. This also
+ 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.
+
+ set_ftrace_notrace: This has an effect opposite to that of
+ set_ftrace_filter. Any function that is added here will not
+ be traced. If a function exists in both set_ftrace_filter
+ and set_ftrace_notrace, the function will _not_ be traced.