==== //depot/user/lulf/fstat/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c#1 - /home/lulf/dev/freebsd/p4/fstat/sys/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c ====
@@ -65,6 +65,9 @@
 #ifdef _KERNEL
 struct kmem_cache *znode_cache = NULL;
 
+SYSCTL_INT(_debug_sizeof, OID_AUTO, znode, CTLFLAG_RD,
+	0, sizeof(znode_t), "sizeof(znode_t)");
+
 /*ARGSUSED*/
 static void
 znode_pageout_func(dmu_buf_t *dbuf, void *user_ptr)