Recent -stable show strange warning about kern.maxswzone

[Andrey Chernov]

I have kern.maxswzone default (32m), and now start to see this message:

warning: total configured swap (1048576 pages) exceeds maximum recommended 
amount (995904 pages). 
warning: increase kern.maxswzone or reduce amount of swap.

As I read somewhere 32m of maxswzone is enough up to 7Gb of swap, but my 
swap is 4Gb only.
I try to increase it in anyway up to 34m but nothing is changed.
Should I just ignore this warning or need to increase it even more?
For increase case, how I can guess needed value?

-- 
http://ache.vniz.net/