From 7bbab38d07f3185fddf6fce126e2239010efdfce Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Mon, 5 Nov 2018 18:03:33 +0900 Subject: tracing: Use dyn_event framework for synthetic events Use dyn_event framework for synthetic events. This shows synthetic events on "tracing/dynamic_events" file in addition to tracing/synthetic_events interface. User can also define new events via tracing/dynamic_events with "s:" prefix. So, the new syntax is below; s:[synthetic/]EVENT_NAME TYPE ARG; [TYPE ARG;]... To remove events via tracing/dynamic_events, you can use "-:" prefix as same as other events. Link: http://lkml.kernel.org/r/154140861301.17322.15454611233735614508.stgit@devbox Reviewed-by: Tom Zanussi Tested-by: Tom Zanussi Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'kernel/trace/trace.c') diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 7e0332f90ed4..911470ad9e94 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4620,6 +4620,9 @@ static const char readme_msg[] = "\t accepts: event-definitions (one definition per line)\n" "\t Format: p[:[/]] []\n" "\t r[maxactive][:[/]] []\n" +#ifdef CONFIG_HIST_TRIGGERS + "\t s:[synthetic/] []\n" +#endif "\t -:[/]\n" #ifdef CONFIG_KPROBE_EVENTS "\t place: [:][+]|\n" @@ -4638,6 +4641,11 @@ static const char readme_msg[] = "\t type: s8/16/32/64, u8/16/32/64, x8/16/32/64, string, symbol,\n" "\t b@/,\n" "\t \\[\\]\n" +#ifdef CONFIG_HIST_TRIGGERS + "\t field: ;\n" + "\t stype: u8/u16/u32/u64, s8/s16/s32/s64, pid_t,\n" + "\t [unsigned] char/int/long\n" +#endif #endif " events/\t\t- Directory containing all trace event subsystems:\n" " enable\t\t- Write 0/1 to enable/disable tracing of all events\n" -- cgit