diff options
| author |   Steven Rostedt <srostedt@redhat.com> | 2012-10-11 10:15:05 -0400 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2012-10-31 16:45:29 -0400 |
| commit | 81698831bc462ff16f76bc11249a1e492424da4c (patch) | |
| tree | 7d980745e74be221d0fab8607ac764ee7408edb4 /kernel/trace/trace_events.c | |
| parent | tracing: Expand ring buffer when trace_printk() is used (diff) | |
| download | linux-dev-81698831bc462ff16f76bc11249a1e492424da4c.tar.xz linux-dev-81698831bc462ff16f76bc11249a1e492424da4c.zip | |
tracing: Enable comm recording if trace_printk() is used
If comm recording is not enabled when trace_printk() is used then
you just get this type of output:
[ adding trace_printk("hello! %d", irq); in do_IRQ ]
<...>-2843 [001] d.h. 80.812300: do_IRQ: hello! 14
<...>-2734 [002] d.h2 80.824664: do_IRQ: hello! 14
<...>-2713 [003] d.h. 80.829971: do_IRQ: hello! 14
<...>-2814 [000] d.h. 80.833026: do_IRQ: hello! 14
By enabling the comm recorder when trace_printk is enabled:
hackbench-6715 [001] d.h. 193.233776: do_IRQ: hello! 21
sshd-2659 [001] d.h. 193.665862: do_IRQ: hello! 21
<idle>-0 [001] d.h1 193.665996: do_IRQ: hello! 21
Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to '')
| -rw-r--r-- | kernel/trace/trace_events.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index d608d09d08c0..dec47e70e254 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -1489,6 +1489,9 @@ static __init int event_trace_enable(void) if (ret) pr_warn("Failed to enable trace event: %s\n", token); } + + trace_printk_start_comm(); + return 0; } |