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author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-07 12:28:51 -0500 |
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committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-07 12:49:56 -0500 |
commit | c4846480831ea526bcab0ca0bf6364bfa6ed4227 (patch) | |
tree | 642a94f96d1622881b1c4fcbff5ab0e5a3114f81 /kernel/trace/trace_events.c | |
parent | cb1f98c5e5742273bca39410d504430793ab701a (diff) | |
download | linux-c4846480831ea526bcab0ca0bf6364bfa6ed4227.tar.gz linux-c4846480831ea526bcab0ca0bf6364bfa6ed4227.tar.bz2 linux-c4846480831ea526bcab0ca0bf6364bfa6ed4227.zip |
tracing: Add enabling of events to boot instances
Add the format of:
trace_instance=foo,sched:sched_switch,irq_handler_entry,initcall
That will create the "foo" instance and enable the sched_switch event
(here were the "sched" system is explicitly specified), the
irq_handler_entry event, and all events under the system initcall.
Link: https://lkml.kernel.org/r/20230207173026.386114535@goodmis.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events.c')
-rw-r--r-- | kernel/trace/trace_events.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index b07931ad97de..cf3fd74fa675 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -3750,10 +3750,9 @@ static __init int event_trace_memsetup(void) return 0; } -static __init void -early_enable_events(struct trace_array *tr, bool disable_first) +__init void +early_enable_events(struct trace_array *tr, char *buf, bool disable_first) { - char *buf = bootup_event_buf; char *token; int ret; @@ -3806,7 +3805,7 @@ static __init int event_trace_enable(void) */ __trace_early_add_events(tr); - early_enable_events(tr, false); + early_enable_events(tr, bootup_event_buf, false); trace_printk_start_comm(); @@ -3834,7 +3833,7 @@ static __init int event_trace_enable_again(void) if (!tr) return -ENODEV; - early_enable_events(tr, true); + early_enable_events(tr, bootup_event_buf, true); return 0; } |