From: Tom Zanussi Date: Sun, 4 Oct 2020 22:14:07 +0000 (-0500) Subject: tracing: Add README information for synthetic_events file X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1bc36bd4a8557285870b34cfec7910871049e93e;p=linux.git tracing: Add README information for synthetic_events file Add an entry with a basic description of events/synthetic_events along with a simple example. Link: https://lkml.kernel.org/r/3c7f178cf95aaeebc01eda7d95600dd937233eb7.1601848695.git.zanussi@kernel.org Reviewed-by: Masami Hiramatsu Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware) --- diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 3f2533adae72a..73fd0e0c0f39e 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5249,7 +5249,12 @@ static const char readme_msg[] = "\t trace(,param list) - generate synthetic event\n" "\t save(field,...) - save current event fields\n" #ifdef CONFIG_TRACER_SNAPSHOT - "\t snapshot() - snapshot the trace buffer\n" + "\t snapshot() - snapshot the trace buffer\n\n" +#endif +#ifdef CONFIG_SYNTH_EVENTS + " events/synthetic_events\t- Create/append/remove/show synthetic events\n" + "\t Write into this file to define/undefine new synthetic events.\n" + "\t example: echo 'myevent u64 lat; char name[]' >> synthetic_events\n" #endif #endif ;