[ 1368.082196] sysctl: The scan_unevictable_pages sysctl/node-interface has been disabled for lack of a legitimate use case.  If you have one, please send an email to linux-mm@kvack.org.

What's more, in my Cubieboard3 using the linux-sunxi kernel, the set of ipv6.conf.all.forwarding will disable my IPv6 access.