diff --git a/module/os/freebsd/spl/spl_taskq.c b/module/os/freebsd/spl/spl_taskq.c
index 3fa7939bd..ba22c77b6 100644
--- a/module/os/freebsd/spl/spl_taskq.c
+++ b/module/os/freebsd/spl/spl_taskq.c
@@ -55,6 +55,11 @@ __FBSDID("$FreeBSD$");
 static uint_t taskq_tsd;
 static uma_zone_t taskq_zone;
 
+/*
+ * Global system-wide dynamic task queue available for all consumers. This
+ * taskq is not intended for long-running tasks; instead, a dedicated taskq
+ * should be created.
+ */
 taskq_t *system_taskq = NULL;
 taskq_t *system_delay_taskq = NULL;
 taskq_t *dynamic_taskq = NULL;
diff --git a/module/os/linux/spl/spl-taskq.c b/module/os/linux/spl/spl-taskq.c
index fb25a4154..a879c2856 100644
--- a/module/os/linux/spl/spl-taskq.c
+++ b/module/os/linux/spl/spl-taskq.c
@@ -51,7 +51,11 @@ module_param(spl_taskq_thread_sequential, int, 0644);
 MODULE_PARM_DESC(spl_taskq_thread_sequential,
 	"Create new taskq threads after N sequential tasks");
 
-/* Global system-wide dynamic task queue available for all consumers */
+/*
+ * Global system-wide dynamic task queue available for all consumers. This
+ * taskq is not intended for long-running tasks; instead, a dedicated taskq
+ * should be created.
+ */
 taskq_t *system_taskq;
 EXPORT_SYMBOL(system_taskq);
 /* Global dynamic task queue for long delay */