[openib-general] [PATCH for-2.6.18] IB/cma: option to limitMTU to 1K

[Michael S. Tsirkin]

Quoting r. Hal Rosenstock <halr at voltaire.com>:
> > If path MTU selector in path query allows MTU 1K (e.g. "best MTU")
> > and one of the sides is Tavor, select the best MTU that is 1K
> > and not the largest possible.
> 
> How would it be identified if the SA supports this ?

You mean, if SA ignores mtu selector?
Then we are not worse off than we were before we set it - we get 2K MTU for
tavor and it works a bit slower.

> > If path MTU selector requires 2K MTU, return path with 2K MTU.
> 
> Also, I'm not sure that this is the required difference in the SA
> requests :-(

What do you mean?
Its not required, but its legal and it will give us better performance.

-- 
MST