I'm studying the way that the ->recvfrom and ->sendto calls work for RPC-over-RDMA. The ->sendto path moves pages out of the svc_rqst before posting I/O (RDMA Write and Send). Once the work is posted, ->sendto returns, and looks like svc_rqst is released at that point. The subsequent completion of the Send then releases those moved pages. I'm wondering if the transport can be simplified: instead of moving pages around, ->sendto could just wait until the Write and Send activity is complete, then return. The upper layer then releases everything. Another option would be for ->sendto to return a value that means the transport will release the svc_rqst and pages. Or, the svc_rqst could be reference counted. Anyone have thoughts about this? -- Chuck Lever -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
