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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2014-12-12 20:05:10 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2014-12-15 10:16:50 -0500 |
| commit | 5f893b2639b21ffe6834b1aebba392c37d2b83f9 (patch) | |
| tree | aff7db6baf3dd393a4791f2106ebacbe02b1ae5b /init/main.c | |
| parent | aee4e5f3d3abb7a2239dd02f6d8fb173413fd02f (diff) | |
| download | lwn-5f893b2639b21ffe6834b1aebba392c37d2b83f9.tar.gz lwn-5f893b2639b21ffe6834b1aebba392c37d2b83f9.zip | |
tracing: Move enabling tracepoints to just after rcu_init()
Enabling tracepoints at boot up can be very useful. The tracepoint
can be initialized right after RCU has been. There's no need to
wait for the early_initcall() to be called. That's too late for some
things that can use tracepoints for debugging. Move the logic to
enable tracepoints out of the initcalls and into init/main.c to
right after rcu_init().
This also allows trace_printk() to be used early too.
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1412121539300.16494@nanos
Link: http://lkml.kernel.org/r/20141214164104.307127356@goodmis.org
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'init/main.c')
| -rw-r--r-- | init/main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c index 800a0daede7e..70687069f8e2 100644 --- a/init/main.c +++ b/init/main.c @@ -577,6 +577,10 @@ asmlinkage __visible void __init start_kernel(void) local_irq_disable(); idr_init_cache(); rcu_init(); + + /* trace_printk() and trace points may be used after this */ + trace_init(); + context_tracking_init(); radix_tree_init(); /* init some links before init_ISA_irqs() */ |