X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fcommands%2Fenable_channels.c;h=4e56b3ca5f38b2ad87dec90291a8dc9438d9f3f2;hb=93e6c8a01b8c4a499b66eeeba2558cca2260de5f;hp=91345e051247a6bed7d55be7df10ccee2cfcf023;hpb=373d38732a83167f19c3be89cf9ff238743cdeb0;p=lttng-tools.git

diff --git a/src/bin/lttng/commands/enable_channels.c b/src/bin/lttng/commands/enable_channels.c
index 91345e051..4e56b3ca5 100644
--- a/src/bin/lttng/commands/enable_channels.c
+++ b/src/bin/lttng/commands/enable_channels.c
@@ -104,10 +104,14 @@ static void usage(FILE *ofp)
 	fprintf(ofp, "                               (default: %u, kernel default: %u)\n",
 		DEFAULT_CHANNEL_SUBBUF_SIZE,
 		DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE);
+	fprintf(ofp, "                               Needs to be a power of 2 for\n");
+        fprintf(ofp, "                               kernel and ust tracers\n");
 	fprintf(ofp, "      --num-subbuf NUM     Number of subbufers\n");
 	fprintf(ofp, "                               (default: %u, kernel default: %u)\n",
 		DEFAULT_CHANNEL_SUBBUF_NUM,
 		DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM);
+	fprintf(ofp, "                               Needs to be a power of 2 for\n");
+        fprintf(ofp, "                               kernel and ust tracers\n");
 	fprintf(ofp, "      --switch-timer USEC  Switch timer interval in usec (default: %u)\n",
 		DEFAULT_CHANNEL_SWITCH_TIMER);
 	fprintf(ofp, "      --read-timer USEC    Read timer interval in usec (default: %u)\n",