diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2008-12-03 15:36:59 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-04 09:09:36 +0100 |
| commit | 804a685162a7080386714166776f57255a75238e (patch) | |
| tree | f7b79000146532c0ad6571440652368e2521119a /kernel/trace/ftrace.c | |
| parent | 0ef8cde56ab92ab3f65221246dc1622c6b5068b3 (diff) | |
| download | linux-804a685162a7080386714166776f57255a75238e.tar.bz2 | |
ftrace: trace single pid for function graph tracer
Impact: New feature
This patch makes the changes to set_ftrace_pid apply to the function
graph tracer.
# echo $$ > /debugfs/tracing/set_ftrace_pid
# echo function_graph > /debugfs/tracing/current_tracer
Will cause only the current task to be traced. Note, the trace flags are
also inherited by child processes, so the children of the shell
will also be traced.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/ftrace.c')
| -rw-r--r-- | kernel/trace/ftrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index c5049f54a275..57592a9dd630 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -48,7 +48,7 @@ int ftrace_enabled __read_mostly; static int last_ftrace_enabled; /* set when tracing only a pid */ -static int ftrace_pid_trace = -1; +int ftrace_pid_trace = -1; /* Quick disabling of function tracer. */ int function_trace_stop; |