Merge branch 'timers/nohz-help-testing' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/nohz

Pull full dynticks helpers from Frederic Weisbecker:

 - handy tracepoints that allow dynticks analysis,
   to answer "why does my tick not stop??" questions

 - select CONFIG_RCU_NOCB_ALL

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h
index 425bcfe56c62..f5eb53eb658f 100644
--- a/include/trace/events/timer.h
+++ b/include/trace/events/timer.h
@@ -323,6 +323,27 @@ TRACE_EVENT(itimer_expire,
                   (int) __entry->pid, (unsigned long long)__entry->now)
 );
 
+#ifdef CONFIG_NO_HZ_FULL
+TRACE_EVENT(tick_stop,
+
+        TP_PROTO(int success, char *error_msg),
+
+        TP_ARGS(success, error_msg),
+
+        TP_STRUCT__entry(
+                __field( int ,          success )
+                __string( msg,          error_msg )
+        ),
+
+        TP_fast_assign(
+                __entry->success        = success;
+                __assign_str(msg, error_msg);
+        ),
+
+        TP_printk("success=%s msg=%s",  __entry->success ? "yes" : "no", __get_str(msg))
+);
+#endif
+
 #endif /*  _TRACE_TIMER_H */
 
 /* This part must be outside protection */