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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2020-03-17 17:32:32 -0400
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2020-03-27 16:39:01 -0400
commitc9b7a4a72ff64e67b7e877a99fd652230dc26058 (patch)
tree52c419fb90561dd42e81011c073e6851020e6afd /include/linux/ring_buffer.h
parent06e0a548bad0f43a21e036db018e4dadb501ce8b (diff)
downloadlinux-c9b7a4a72ff64e67b7e877a99fd652230dc26058.tar.gz
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) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/ring_buffer.h')
-rw-r--r--include/linux/ring_buffer.h1
1 files changed, 1 insertions, 0 deletions
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);