Index: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
===================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
@@ -661,7 +661,13 @@
 	 * Number of bytes consumed by bonus buffers.
 	 */
 	kstat_named_t arcstat_bonus_size;
+#if defined(__FreeBSD__) && defined(COMPAT_FREEBSD11)
 	/*
+	 * Sum of the previous three counters, provided for compatibility.
+	 */
+	kstat_named_t arcstat_other_size;
+#endif
+	/*
 	 * Total number of bytes consumed by ARC buffers residing in the
 	 * arc_anon state. This includes *all* buffers in the arc_anon
 	 * state; e.g. data, metadata, evictable, and unevictable buffers
@@ -875,6 +881,9 @@
 	{ "dbuf_size",			KSTAT_DATA_UINT64 },
 	{ "dnode_size",			KSTAT_DATA_UINT64 },
 	{ "bonus_size",			KSTAT_DATA_UINT64 },
+#if defined(__FreeBSD__) && defined(COMPAT_FREEBSD11)
+	{ "other_size",			KSTAT_DATA_UINT64 },
+#endif
 	{ "anon_size",			KSTAT_DATA_UINT64 },
 	{ "anon_evictable_data",	KSTAT_DATA_UINT64 },
 	{ "anon_evictable_metadata",	KSTAT_DATA_UINT64 },
@@ -6825,6 +6834,11 @@
 		ARCSTAT(arcstat_bonus_size) = aggsum_value(&astat_bonus_size);
 		ARCSTAT(arcstat_dnode_size) = aggsum_value(&astat_dnode_size);
 		ARCSTAT(arcstat_dbuf_size) = aggsum_value(&astat_dbuf_size);
+#if defined(__FreeBSD__) && defined(COMPAT_FREEBSD11)
+		ARCSTAT(arcstat_other_size) = aggsum_value(&astat_bonus_size) +
+		    aggsum_value(&astat_dnode_size) +
+		    aggsum_value(&astat_dbuf_size);
+#endif
 		ARCSTAT(arcstat_l2_hdr_size) = aggsum_value(&astat_l2_hdr_size);
 	}