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| author |   Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-03-17 17:32:32 -0400 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-03-27 16:39:01 -0400 |
| commit | c9b7a4a72ff64e67b7e877a99fd652230dc26058 (patch) | |
| tree | 52c419fb90561dd42e81011c073e6851020e6afd /include/linux/ring_buffer.h | |
| parent | tracing: Do not disable tracing when reading the trace file (diff) | |
| download | wireguard-linux-c9b7a4a72ff64e67b7e877a99fd652230dc26058.tar.xz wireguard-linux-c9b7a4a72ff64e67b7e877a99fd652230dc26058.zip | |
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.h | 1 |
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); |