Re: [PATCH V2 3/5] RDMA/core: transport-independent access flags

Or Gerlitz
2015-06-30T09:03:44Z

On 6/30/2015 12:36 AM, Steve Wise wrote:
> The semantics for MR access flags are not consistent across RDMA
> protocols. So rather than have applications try and glean what they
> need, have them pass in the intended roles and attributes for the MR to
> be allocated and let the RDMA core select the appropriate access flags
> given the roles, attributes, and device capabilities.

wait, we have NFSoRDMA (net/sunrpc/xprtrdma/*) in the kernel for years
and it works on top of both IB/RoCE and iWARP.I know they have there 5-6
memory registration methods.. but if we stick to their mode that uses
fast registration ala your upstream commit 0f7ec3 "RDMA/core: Add memory
management extensions support" -- what's missing or how come it work
w/o the enhancement suggested here?Added Chuck.