X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fkernel-consumer%2Fkernel-consumer.c;h=627cd2a8b5d7aad61ffc1d97794a0c2bbf756267;hb=52a0e9318791b1f188742059e904d42ee0d7e231;hp=246ae6b59dedc6182b1628aef8065a686959bbbc;hpb=f72bb42fe5fb36e43df18f9df6d0d389db699170;p=lttng-tools.git

diff --git a/src/common/kernel-consumer/kernel-consumer.c b/src/common/kernel-consumer/kernel-consumer.c
index 246ae6b59..627cd2a8b 100644
--- a/src/common/kernel-consumer/kernel-consumer.c
+++ b/src/common/kernel-consumer/kernel-consumer.c
@@ -144,7 +144,8 @@ static int lttng_kconsumer_snapshot_channel(
 
 	/* Splice is not supported yet for channel snapshot. */
 	if (channel->output != CONSUMER_CHANNEL_MMAP) {
-		ERR("Unsupported output %d", channel->output);
+		ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot",
+				channel->name);
 		ret = -1;
 		goto end;
 	}
@@ -236,7 +237,7 @@ static int lttng_kconsumer_snapshot_channel(
 				produced_pos, nb_packets_per_stream,
 				stream->max_sb_size);
 
-		while (consumed_pos < produced_pos) {
+		while ((long) (consumed_pos - produced_pos) < 0) {
 			ssize_t read_len;
 			unsigned long len, padded_len;