Index: sys/dev/netmap/netmap_freebsd.c
===================================================================
--- sys/dev/netmap/netmap_freebsd.c
+++ sys/dev/netmap/netmap_freebsd.c
@@ -58,6 +58,7 @@
 #include <sys/unistd.h> /* RFNOWAIT */
 #include <sys/sched.h> /* sched_bind() */
 #include <sys/smp.h> /* mp_maxid */
+#include <sys/taskqueue.h> /* taskqueue_enqueue(), taskqueue_drain()*/
 #include <net/if.h>
 #include <net/if_var.h>
 #include <net/if_types.h> /* IFT_ETHER */
@@ -75,16 +76,29 @@
 
 /* ======================== FREEBSD-SPECIFIC ROUTINES ================== */
 
+static void
+nm_kqueue_notify(void *opaque, int pending)
+{
+	struct nm_selinfo *si = opaque;
+
+	/* We use a non-zero hint to distinguish this notification call
+	 * from the call done in kqueue_scan(), which uses hint=0.
+	 */
+	KNOTE_UNLOCKED(&si->si.si_note, /*hint=*/0x100);
+}
+
 void nm_os_selinfo_init(NM_SELINFO_T *si) {
 	struct mtx *m = &si->m;
 	mtx_init(m, "nm_kn_lock", NULL, MTX_DEF);
 	knlist_init_mtx(&si->si.si_note, m);
+	TASK_INIT(&si->ntfytask, 0, nm_kqueue_notify, si);
 }
 
 void
 nm_os_selinfo_uninit(NM_SELINFO_T *si)
 {
 	/* XXX kqueue(9) needed; these will mirror knlist_init. */
+	taskqueue_drain(taskqueue_swi, &si->ntfytask);
 	knlist_delete(&si->si.si_note, curthread, /*islocked=*/0);
 	knlist_destroy(&si->si.si_note);
 	/* now we don't need the mutex anymore */
@@ -1315,11 +1329,7 @@
 	if (netmap_verbose)
 		nm_prinf("on knote %p", &si->si.si_note);
 	selwakeuppri(&si->si, PI_NET);
-	/* We use a non-zero hint to distinguish this notification call
-	 * from the call done in kqueue_scan(), which uses hint=0.
-	 */
-	KNOTE(&si->si.si_note, /*hint=*/0x100,
-	    mtx_owned(&si->m) ? KNF_LISTLOCKED : 0);
+	taskqueue_enqueue(taskqueue_swi, &si->ntfytask);
 }
 
 void
Index: sys/dev/netmap/netmap_kern.h
===================================================================
--- sys/dev/netmap/netmap_kern.h
+++ sys/dev/netmap/netmap_kern.h
@@ -134,6 +134,7 @@
 struct nm_selinfo {
 	struct selinfo si;
 	struct mtx m;
+	struct task ntfytask;
 };