huge number of "megasas_register_aen" messages in dmesg logs

I'm seeing a massive amount of megasas_register_aen messages in the dmesg logs, what is wrong?

You didn't mention the running build, but in general, the modules do a registration to them selves when start dealing with the system and it's kernel, so such messages should be just a notifications and not a warning or errors.

You may check your RAID controller Firmware and update it, also check the following KB link that let you control the alerts and notifications that you get from your controller:

http://kb.open-e.com/Configuring-LSI...S-V7_1693.html