diff options
| author | Steven Rostedt <srostedt@redhat.com> | 2008-11-07 22:36:02 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-08 09:51:29 +0100 |
| commit | 49833fc232bd6a5076496994d855f601354501d7 (patch) | |
| tree | 819089f20578815ee2b4ec00c6cc3de668298aee /kernel | |
| parent | 451931702017951f74624ddc4f7f02e4641b0e20 (diff) | |
ftrace: enable trace_printk by default
Impact: have the ftrace_printk enabled on startup
It is confusing to have to "echo trace_printk > /debug/tracing/iter_ctrl"
after adding ftrace_printk in the kernel.
Currently the trace_printk is set to off by default. ftrace_printk
should only be in open kernel code when used for debugging, and thus
it should be enabled by default.
It may also be used to record data within a tracer, but those ftrace_printks
should be within wrappers that are either enabled by trace_points or
have a variable protecting the code path from being entered when the
tracer is disabled.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d55ccfc8d67..dbbdacfaaf9 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -205,7 +205,7 @@ static DEFINE_MUTEX(trace_types_lock); static DECLARE_WAIT_QUEUE_HEAD(trace_wait); /* trace_flags holds iter_ctrl options */ -unsigned long trace_flags = TRACE_ITER_PRINT_PARENT; +unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK; /** * trace_wake_up - wake up tasks waiting for trace input |