From: Bob Pearson <rpearsonhpe@gmail.com>
To: Xiao Yang <yangx.jy@fujitsu.com>,
linux-rdma@vger.kernel.org, leon@kernel.org
Cc: zyjzyj2000@gmail.com, jgg@nvidia.com
Subject: Re: [PATCH v2] providers/rxe: Set the correct value of resid for inline data
Date: Fri, 13 Aug 2021 17:11:31 -0500 [thread overview]
Message-ID: <7279c618-d373-d7ce-c67c-97e519b48e94@gmail.com> (raw)
In-Reply-To: <20210809150738.150596-1-yangx.jy@fujitsu.com>
On 8/9/21 10:07 AM, Xiao Yang wrote:
> Resid indicates the residual length of transmitted bytes but current
> rxe sets it to zero for inline data at the beginning. In this case,
> request will transmit zero byte to responder wrongly.
>
> Resid should be set to the total length of transmitted bytes at the
> beginning.
>
> Note:
> Just remove the useless setting of resid in init_send_wqe().
>
> Fixes: 1a894ca10105 ("Providers/rxe: Implement ibv_create_qp_ex verb")
> Fixes: 8337db5df125 ("Providers/rxe: Implement memory windows")
> Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com>
> ---
> providers/rxe/rxe.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/providers/rxe/rxe.c b/providers/rxe/rxe.c
> index 3c3ea8bb..3533a325 100644
> --- a/providers/rxe/rxe.c
> +++ b/providers/rxe/rxe.c
> @@ -1004,7 +1004,7 @@ static void wr_set_inline_data(struct ibv_qp_ex *ibqp, void *addr,
>
> memcpy(wqe->dma.inline_data, addr, length);
> wqe->dma.length = length;
> - wqe->dma.resid = 0;
> + wqe->dma.resid = length;
> }
>
> static void wr_set_inline_data_list(struct ibv_qp_ex *ibqp, size_t num_buf,
> @@ -1035,6 +1035,7 @@ static void wr_set_inline_data_list(struct ibv_qp_ex *ibqp, size_t num_buf,
> }
>
> wqe->dma.length = tot_length;
> + wqe->dma.resid = tot_length;
> }
>
> static void wr_set_sge(struct ibv_qp_ex *ibqp, uint32_t lkey, uint64_t addr,
> @@ -1473,8 +1474,6 @@ static int init_send_wqe(struct rxe_qp *qp, struct rxe_wq *sq,
> if (ibwr->send_flags & IBV_SEND_INLINE) {
> uint8_t *inline_data = wqe->dma.inline_data;
>
> - wqe->dma.resid = 0;
> -
> for (i = 0; i < num_sge; i++) {
> memcpy(inline_data,
> (uint8_t *)(long)ibwr->sg_list[i].addr,
>
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
next prev parent reply other threads:[~2021-08-13 22:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 15:07 [PATCH v2] providers/rxe: Set the correct value of resid for inline data Xiao Yang
2021-08-10 3:40 ` Zhu Yanjun
2021-08-10 16:33 ` yangx.jy
2021-08-16 7:47 ` Zhu Yanjun
2021-08-17 0:54 ` yangx.jy
2021-08-23 2:44 ` Zhu Yanjun
2021-08-23 3:58 ` yangx.jy
2021-08-13 22:11 ` Bob Pearson [this message]
2021-08-16 3:55 ` Zhu Yanjun
2021-08-16 18:52 ` Bob Pearson
2021-08-23 1:33 ` yangx.jy
2021-08-25 9:44 ` Leon Romanovsky
2021-09-02 8:27 ` yangx.jy
2021-09-02 19:48 ` Bob Pearson
2021-09-03 1:39 ` yangx.jy
2021-09-03 3:34 ` Zhu Yanjun
2021-09-26 10:51 ` Leon Romanovsky
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