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authorSteven Rostedt <srostedt@redhat.com>2008-11-07 22:36:02 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-08 09:51:29 +0100
commit49833fc232bd6a5076496994d855f601354501d7 (patch)
tree819089f20578815ee2b4ec00c6cc3de668298aee /kernel/trace/trace.c
parent451931702017951f74624ddc4f7f02e4641b0e20 (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/trace/trace.c')
-rw-r--r--kernel/trace/trace.c2
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