Andy Grover wrote:
RDS follows each RDMA write op with a Send op [...] we want to omit the Send
Andy,
This way or another the side which isn't initiating the rdma write has to be notified that the local buffer && rkey (stag) they advertised can now invalidated from the HCA/RNIC IOMMU, its mapping from the node IOMMU, returned to the pool it was allocated from, reclaimed by higher layers etc.
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