linux-kernel - [PATCH v3 0/2] RDMA/rxe: Fix no completion event issue

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Date:   Mon, 16 May 2022 09:53:27 +0800
From:   Li Zhijian <lizhijian@...itsu.com>
To:     Yanjun Zhu <yanjun.zhu@...ux.dev>, Jason Gunthorpe <jgg@...pe.ca>,
        "Haakon Bugge" <haakon.bugge@...cle.com>,
        Cheng Xu <chengyou@...ux.alibaba.com>,
        <linux-rdma@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, Li Zhijian <lizhijian@...itsu.com>
Subject: [PATCH v3 0/2] RDMA/rxe: Fix no completion event issue

Since RXE always posts RDMA_WRITE successfully, it's observed that
no more completion occurs after a few incorrect posts. Actually, it
will block the polling. we can easily reproduce it by the below pattern.

a. post correct RDMA_WRITE
b. poll completion event
while true {
  c. post incorrect RDMA_WRITE(wrong rkey for example)
  d. poll completion event <<<< block after 2 incorrect RDMA_WRITE posts
}

Li Zhijian (2):
  RDMA/rxe: Update wqe_index for each wqe error completion
  RDMA/rxe: Generate error completion for error requester QP state

 drivers/infiniband/sw/rxe/rxe_req.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

-- 
2.31.1