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| 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.h | |
| parent | b382ede6b5eb8188926b72a9ef42fd2354342a97 (diff) | |
| download | talos-op-linux-81698831bc462ff16f76bc11249a1e492424da4c.tar.gz talos-op-linux-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 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index c56a233c006e..7824a55bd3fc 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -841,6 +841,7 @@ extern const char *__start___trace_bprintk_fmt[]; extern const char *__stop___trace_bprintk_fmt[]; void trace_printk_init_buffers(void); +void trace_printk_start_comm(void); #undef FTRACE_ENTRY #define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \ |
