Re: [PATCH] RDMA/rxe: Split rxe_invalidate_mr into local and remote versions

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On Tue, Jun 28, 2022 at 06:21:09PM +0200, haris iqbal wrote:

> > Yes, no driver in Linux suports a disjoint key space.
> 
> If disjoint key space is not supported in Linux; does this mean
> irrespective of whether an MR is registered (IB_WR_REG_MR) for LOCAL
> or REMOTE access, both rkey and lkey should be set?

No.. It means given any key the driver can always tell if it is a rkey
or a lkey. There is never any aliasing of key values. Thus the API
often doesn't have a away to tell if the given key is an rkey or lkey.
 
> PS: This discussion started in the following thread,
> https://marc.info/?l=linux-rdma&m=165390868832428&w=2

rxe is incorrect to not accept the lkey presented on the
invalidate_rkey input. invalidate_rkey is misnamed.

Jason



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