File-based SWAP not working in FreeBSD 10.0

[beesatmsu]

So I followed 12.12.3 of https://www.freebsd.org/doc/handbook/adding-swap-space.html and swap would work after doing mdconfig. However, it stops working after rebooting, even though the rc.conf file has the required line

swapfile="/usr/swap0"

 

[beesatmsu]

I saw a quick message during booting saying something about "swapfile" is obsolete, but strangely, it is not inside the dmesg.

This is a disk replicated by dump/restore. So perhaps I have to recreate the swapfile?

 

[wblock@]

The method of using swap files has changed. See fstab(5).

 

[beesatmsu]

Thank you!
I tried adding

md11	     none	     swap    sw,file=/swapfile	     0 0

to /etc/fstab.

and it works fine...I also tried partitioning a new disk differently yesterday, with a swap partition and dumped a live system and that also worked.