RDMA/srpt: Increase max_send_sge (e0cca8b4) · Commits · 戴 / test

The ib_srpt driver limits max_send_sge to 16. Since that is a workaround for an mlx4 bug that has been fixed, increase max_send_sge. See also commit ("IB/mlx4: Use 4K pages for kernel QP's WQE buffer"). Link: https://lore.kernel.org/r/20200525172212.14413-5-bvanassche@acm.org Signed-off-by:

Bart Van Assche <bvanassche@acm.org> Signed-off-by:

Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/ulp/srpt/ib_srpt.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -1816,8 +1816,7 @@ retry:
		*/
		qp_init->cap.max_send_wr = min(sq_size / 2, attrs->max_qp_wr);
		qp_init->cap.max_rdma_ctxs = sq_size / 2;
		qp_init->cap.max_send_sge = min(attrs->max_send_sge,
		SRPT_MAX_SG_PER_WQE);
		qp_init->cap.max_send_sge = attrs->max_send_sge;
		qp_init->cap.max_recv_sge = 1;
		qp_init->port_num = ch->sport->port;
		if (sdev->use_srq)

drivers/infiniband/ulp/srpt/ib_srpt.h

+0 −5

Original line number	Diff line number	Diff line
		@@ -105,11 +105,6 @@ enum {
		SRP_CMD_ACA = 0x4,

		SRPT_DEF_SG_TABLESIZE = 128,
		/*
		* An experimentally determined value that avoids that QP creation
		* fails due to "swiotlb buffer is full" on systems using the swiotlb.
		*/
		SRPT_MAX_SG_PER_WQE = 16,

		MIN_SRPT_SQ_SIZE = 16,
		DEF_SRPT_SQ_SIZE = 4096,

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