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Commit 063af595 authored by Parav Pandit's avatar Parav Pandit Committed by Doug Ledford
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IB/rxe: Avoid scheduling tasklet for userspace QP 



This patch avoids scheduing tasklet for WQE and protocol processing
for user space QP. It performs the task in calling process context.

To improve code readability kernel specific post_send handling moved to
post_send_kernel() function.

Signed-off-by: default avatarParav Pandit <pandit.parav@gmail.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 61347fa6

drivers/infiniband/sw/rxe/rxe_verbs.c

+25 −13
Original line number Diff line number Diff line
@@ -801,26 +801,15 @@ static int post_one_send(struct rxe_qp *qp, struct ib_send_wr *ibwr, 
	return err;

}



static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,

static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,

				struct ib_send_wr **bad_wr)

{

	int err = 0;

	struct rxe_qp *qp = to_rqp(ibqp);

	unsigned int mask;

	unsigned int length = 0;

	int i;

	int must_sched;



	if (unlikely(!qp->valid)) {

		*bad_wr = wr;

		return -EINVAL;

	}



	if (unlikely(qp->req.state < QP_STATE_READY)) {

		*bad_wr = wr;

		return -EINVAL;

	}



	while (wr) {

		mask = wr_opcode_mask(wr->opcode, qp);

		if (unlikely(!mask)) {
@@ -861,6 +850,29 @@ static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, 
	return err;

}



static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,

			 struct ib_send_wr **bad_wr)

{

	struct rxe_qp *qp = to_rqp(ibqp);



	if (unlikely(!qp->valid)) {

		*bad_wr = wr;

		return -EINVAL;

	}



	if (unlikely(qp->req.state < QP_STATE_READY)) {

		*bad_wr = wr;

		return -EINVAL;

	}



	if (qp->is_user) {

		/* Utilize process context to do protocol processing */

		rxe_run_task(&qp->req.task, 0);

		return 0;

	} else

		return rxe_post_send_kernel(qp, wr, bad_wr);

}



static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,

			 struct ib_recv_wr **bad_wr)

{