lihaidong wrote:
Mr.Wise
||| else {
|||
||| cb->rdma_sq_wr.opcode = IB_WR_RDMA_READ;
||| if (cb->mem == FASTREG) {
||| /*
||| * Immediately follow the read with a
||| * fenced LOCAL_INV.
||| */
||| cb->rdma_sq_wr.next = &inv;
||| memset(&inv, 0, sizeof inv);
||| inv.opcode = IB_WR_LOCAL_INV;
||| inv.ex.invalidate_rkey =
cb->fastreg_mr->rkey;
||| inv.send_flags = IB_SEND_FENCE;
||| }
||| }
|||
||| ret = ib_post_send(cb->qp, &cb->rdma_sq_wr, &bad_wr);
||| if (ret) {
||| printk(KERN_ERR PFX "post send error %d\n", ret);
||| break;
||| }
||| cb->rdma_sq_wr.next = NULL;
the last line, is that safe? There's an invalidate wr following
rdma_sq_wr.This line will not disturb invalidate wr being performed in
lower level, right?
Correct. The work requests are copied by the verbs layer. So once you
return from ib_post_send, the send work request structure itself can be
reused/freed/whatever.
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