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

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Date:   Tue, 7 Jun 2022 08:32:40 +0000
From:   "lizhijian@...itsu.com" <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" <linux-rdma@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 0/2] RDMA/rxe: Fix no completion event issue

Hi Json & Yanjun


I know there are still a few regressions on RXE, but i do wish you could take some time to review these *simple and bugfix* patches
They are not related to the regressions.


Thanks
Zhijian


On 16/05/2022 09:53, Li Zhijian wrote:
> 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(-)
>