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| 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/trace.c | |
| parent | 0ef8cde56ab92ab3f65221246dc1622c6b5068b3 (diff) | |
| download | op-kernel-dev-804a685162a7080386714166776f57255a75238e.zip op-kernel-dev-804a685162a7080386714166776f57255a75238e.tar.gz | |
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/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 710b39a..1bd9574 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1209,6 +1209,9 @@ int trace_graph_entry(struct ftrace_graph_ent *trace) int cpu; int pc; + if (!ftrace_trace_task(current)) + return 0; + if (!ftrace_graph_addr(trace->func)) return 0; |
