CentOS - Apr 2006 - Netconsole - how do I tell id a driver offers polling?

Appologies in advance if there is an obvious answer to this.

I'm experimenting with netconsole. 

When I try to insmod the netconsole module it complains that eth0 doesn't
support polling.

Any idea where I can find a list of supported NICs?

How can I workout if a NIC driver supports polling?

Many thanks

Daveh