RE: [Patch v8 12/12] RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter

Long Li
2022-10-21T22:56:17Z

> > The upper 8 bits of an ib_mr remote token are reserved for use as a
> > rotating key, this allows a consumer to more safely reuse an ib_mr
> > without having to overallocate large region pools.
> >
> > Tom.
>
> Right, my point was that one cannot encode INT_MAX different MR
> identifiers into 32 - 8 = 24 bits.
>
> Best,
> Bernard.

The hardware exposes the number of MRs that exceeds UINT32_MAX.
There is no software stack limit from hardware perspective.

In this case, maybe it's a good idea to set it to 0xFFFFFF. I'm making the change.

Thanks,
Long