diff options
| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-07 20:28:51 +0300 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-02-07 20:49:56 +0300 |
| commit | c4846480831ea526bcab0ca0bf6364bfa6ed4227 (patch) | |
| tree | 642a94f96d1622881b1c4fcbff5ab0e5a3114f81 /Documentation/admin-guide | |
| parent | cb1f98c5e5742273bca39410d504430793ab701a (diff) | |
| download | linux-c4846480831ea526bcab0ca0bf6364bfa6ed4227.tar.xz | |
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 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 9545da5ed849..40304dc3d319 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6278,6 +6278,20 @@ /sys/kernel/tracing/instances + Events can be enabled at the time the instance is created + via: + + trace_instance=<name>,<system1>:<event1>,<system2>:<event2> + + Note, the "<system*>:" portion is optional if the event is + unique. + + trace_instance=foo,sched:sched_switch,irq_handler_entry,initcall + + will enable the "sched_switch" event (note, the "sched:" is optional, and + the same thing would happen if it was left off). The irq_handler_entry + event, and all events under the "initcall" system. + trace_options=[option-list] [FTRACE] Enable or disable tracer options at boot. The option-list is a comma delimited list of options |