[openib-general] Reregister Memory Region Verb

[Galen Shipman]

On Jan 24, 2006, at 8:55 AM, Roland Dreier wrote:

>     Galen> Does OpenIB currently support the Reregister Memory Region
>     Galen> Verb? I wasn't able to find it in the header files..
>
> Roland> No, it doesn't.  What is your use case?  I'm wondering how 
> hard it
> Roland> would be to implement support at least sufficient for what you 
> want to
> Roland> do.
>

I would like to be able to extend an existing registration such that 
the driver would take advantage of the fact that part of the extended 
registration is already registered, i.e. only the "new" memory would be 
pinned and made resident. Also, it would be necessary that this 
operation wouldn't invalidate operations in progress on the original 
registration or the call would block until pending operations had 
completed, although we would prefer that it wouldn't block if possible 
;-) .

- Galen