capture: Replace FIXME by explanation of the limit

[lttng-modules.git] / src / lttng-event-notifier-notification.c

diff --git a/src/lttng-event-notifier-notification.c b/src/lttng-event-notifier-notification.c
index f675de4b1dbddbf6522928d79e810fe2323172dc..b67af11a77ecf0763801030346d6ceefc5f7ace1 100644 (file)
--- a/src/lttng-event-notifier-notification.c
+++ b/src/lttng-event-notifier-notification.c
@@ -13,8 +13,12 @@
 #include <lttng/event-notifier-notification.h>
 
 /*
- * FIXME: this probably too low but it needs to be below 1024 bytes to avoid
- * the frame to be larger than the 1024 limit enforced by the kernel.
+ * The capture buffer size needs to be below 1024 bytes to avoid the
+ * frame to be larger than the 1024 limit enforced by the kernel. If we
+ * ever need to increase it, we will need to use a memory allocation
+ * scheme which allows allocating temporary memory chunks from the
+ * instrumentation sites. This could be done by adapting lttng
+ * tp-mempool to become nmi-safe and lock-free.
  */
 #define CAPTURE_BUFFER_SIZE 512