> I hadn't looked at the kernel side yet; I was waiting for the userspace side 
> to
> sort itself out first.

I think it makes sense to start with how user space can get the data.  Without 
eating up reserved fields, we're starting with 8 bit values.

> Hmm.  16 bits is probably enough for the MTU values, but still, changing kern-
> abi.h will be problematic from an ABI perspective.  Do people care about the
> kernel ABI, or is that mainly a userspace issue?

Well, we definitely care about the kernel to user ABI.

I can't imagine that we're dealing with more than a handful of actual MTU 
values.  Maybe the simplest thing is to extend the mtu enum to include what new 
values are needed, plus add a function to convert it.  (Can we call mulligan?)

I don't know how iwarp handles this.  Does it just report the wrong mtu, since 
it doesn't necessarily matter?  Steve - any idea here?

- Sean
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