From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 12 Dec 2019 18:07:18 +0000 (-0500)
Subject: Fix: consumer: honor "active" flush flag
X-Git-Tag: v2.12.0-rc1~159
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=5416a504a1ff9f2444e594084836dc8b59739526;p=lttng-tools.git

Fix: consumer: honor "active" flush flag

Honor "active" flush flag in both kernel and ust consumers. A flush
"active" does a flush which will not generate empty packets (no event),
whereas an "inactive" flush will generate empty packets if flushing
a current packet which has no event.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Icc9772ba3ae18e96f24354ac6eb9223f343c3458
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/common/consumer/consumer.c b/src/common/consumer/consumer.c
index d81d0fc7a..5a39a0cc7 100644
--- a/src/common/consumer/consumer.c
+++ b/src/common/consumer/consumer.c
@@ -3940,15 +3940,23 @@ int consumer_flush_buffer(struct lttng_consumer_stream *stream, int producer_act
 
 	switch (consumer_data.type) {
 	case LTTNG_CONSUMER_KERNEL:
-		ret = kernctl_buffer_flush(stream->wait_fd);
-		if (ret < 0) {
-			ERR("Failed to flush kernel stream");
-			goto end;
+		if (producer_active) {
+			ret = kernctl_buffer_flush(stream->wait_fd);
+			if (ret < 0) {
+				ERR("Failed to flush kernel stream");
+				goto end;
+			}
+		} else {
+			ret = kernctl_buffer_flush_empty(stream->wait_fd);
+			if (ret < 0) {
+				ERR("Failed to flush kernel stream");
+				goto end;
+			}
 		}
 		break;
 	case LTTNG_CONSUMER32_UST:
 	case LTTNG_CONSUMER64_UST:
-		lttng_ustctl_flush_buffer(stream, producer_active);
+		lttng_ustconsumer_flush_buffer(stream, producer_active);
 		break;
 	default:
 		ERR("Unknown consumer_data type");