From c9b7a4a72ff64e67b7e877a99fd652230dc26058 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (VMware)" Date: Tue, 17 Mar 2020 17:32:32 -0400 Subject: ring-buffer/tracing: Have iterator acknowledge dropped events Have the ring_buffer_iterator set a flag if events were dropped as it were to go and peek at the next event. Have the trace file display this fact if it happened with a "LOST EVENTS" message. Link: http://lkml.kernel.org/r/20200317213417.045858900@goodmis.org Signed-off-by: Steven Rostedt (VMware) --- include/linux/ring_buffer.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/ring_buffer.h') diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h index 0ae603b79b0e..c76b2f3b3ac4 100644 --- a/include/linux/ring_buffer.h +++ b/include/linux/ring_buffer.h @@ -138,6 +138,7 @@ ring_buffer_iter_peek(struct ring_buffer_iter *iter, u64 *ts); void ring_buffer_iter_advance(struct ring_buffer_iter *iter); void ring_buffer_iter_reset(struct ring_buffer_iter *iter); int ring_buffer_iter_empty(struct ring_buffer_iter *iter); +bool ring_buffer_iter_dropped(struct ring_buffer_iter *iter); unsigned long ring_buffer_size(struct trace_buffer *buffer, int cpu); -- cgit v1.2.3-71-gd317