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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2008-12-04 23:49:47 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-05 14:47:43 +0100 |
| commit | 77d683f3e0258d522c5506e7b5fd05c9411184d9 (patch) | |
| tree | defa7451b5218e7cfdd3a92117fca96368791425 /kernel/trace/trace.h | |
| parent | ff32504fdc56407654584ef187b20022c94a3486 (diff) | |
| download | linux-77d683f3e0258d522c5506e7b5fd05c9411184d9.tar.gz linux-77d683f3e0258d522c5506e7b5fd05c9411184d9.tar.bz2 linux-77d683f3e0258d522c5506e7b5fd05c9411184d9.zip | |
tracing/ftrace: fix the check of ftrace_trace_task
Impact: fix default empty traces on function-graph-tracer
The actual ftrace_trace_task() checks if ftrace_pid_trace is allocated
and return 1 if it is true.
If it is NULL, it will check the bit of pid tracing flag for the current
task (which are not set by default).
So by default, a task is not traced.
Actually all tasks should be traced by default and filter_by_pid when
ftrace_pid_trace is allocated.
The appropriate condition should be to return 1 if filter_by_pid is
set.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acke-dby: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index a71bbe0a3631..5ac697065a48 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -551,7 +551,7 @@ extern struct pid *ftrace_pid_trace; static inline int ftrace_trace_task(struct task_struct *task) { - if (ftrace_pid_trace) + if (!ftrace_pid_trace) return 1; return test_tsk_trace_trace(task); |