I have been waiting for 3.11 to make it's way to wheezy-backports so I can start testing zswap (which finally made it today) and just found out zswap doesn't seem to be compiled in. :( It should be completely safe to compile in, as it is disabled by default and needs a grub option to enable. (One needs to edit /etc/default/grub to enable it.) I would be very appreciative if this made it in.