X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconsumer%2Fconsumer-metadata-cache.c;h=5eee4014265f42566776ea34645a0f08504fbde0;hp=5e9dca3ea27bf64fa5987b4e580d6b46c7f168d3;hb=8e1ef46e89a86865736a62d2def88f70acb0be55;hpb=9dd04ae3e2e5ef924839f7209b9c7d693787627e

diff --git a/src/common/consumer/consumer-metadata-cache.c b/src/common/consumer/consumer-metadata-cache.c
index 5e9dca3ea..5eee40142 100644
--- a/src/common/consumer/consumer-metadata-cache.c
+++ b/src/common/consumer/consumer-metadata-cache.c
@@ -120,10 +120,20 @@ int consumer_metadata_wakeup_pipe(const struct lttng_consumer_channel *channel)
 		write_ret = lttng_write(channel->metadata_stream->ust_metadata_poll_pipe[1],
 				&dummy, 1);
 		if (write_ret < 1) {
-			PERROR("Wake-up UST metadata pipe");
-			ret = -1;
-			goto end;
-		}
+			if (errno == EWOULDBLOCK) {
+				/*
+				 * This is fine, the metadata poll thread
+				 * is having a hard time keeping-up, but
+				 * it will eventually wake-up and consume
+				 * the available data.
+				 */
+				ret = 0;
+                        } else {
+				PERROR("Wake-up UST metadata pipe");
+				ret = -1;
+				goto end;
+                        }
+                }
 	}
 
 end:
@@ -263,9 +273,9 @@ int consumer_metadata_cache_flushed(struct lttng_consumer_channel *channel,
 		pthread_mutex_lock(&channel->lock);
 	}
 	pthread_mutex_lock(&channel->timer_lock);
-	pthread_mutex_lock(&channel->metadata_cache->lock);
-
 	metadata_stream = channel->metadata_stream;
+	pthread_mutex_lock(&metadata_stream->lock);
+	pthread_mutex_lock(&channel->metadata_cache->lock);
 
 	if (!metadata_stream) {
 		/*
@@ -285,6 +295,7 @@ int consumer_metadata_cache_flushed(struct lttng_consumer_channel *channel,
 	}
 
 	pthread_mutex_unlock(&channel->metadata_cache->lock);
+	pthread_mutex_unlock(&metadata_stream->lock);
 	pthread_mutex_unlock(&channel->timer_lock);
 	if (!timer) {
 		pthread_mutex_unlock(&channel->lock);