kernel patch to Solaris

Hi Everyone,

In stead of Linux, I have a question about doing a kernel patch to SUN's Solaris.

We are working on a project, and it turns out we might have to modify the I/O's behavior. Therefore, we are thinking to put in a kernel patch to the Solaris OS.

Is there anything we need to consider before we put in the patch such as:

(*) Whether need permission from SUN Microsystem (*) Whether it would affect the service agreement

I would think many commercial package softwares have done the same thing.(modify the OS's behavior) Many thanks for your input.

Mike.
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