Swap on ZFS Volume still panics?

[App Deb]

Reading the wiki guides they mention the official way to add swap volumes on
ZFS (set org.freebsd:swap=on etc..),

So I thought that it should work now, But I just got a panic in 8.1-RELEASE
after a heavy memory situation that touched swap for the first time.

It is a hassle to add gmirror volumes for swap on full zfs systems, is there
any workaround for this, or any news when a fix is coming or if it is
coming?

The guides also mention to turn checksums=off on the swap volume, I don't
understand why, but can this be related to the panics because I had the
checksums enabled in my case.

If the current code procudes guaranteed panics with zfs swap, I think that
every mention of swap on zfs should be removed from the semi-official wiki
guides.

Thanks.