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

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Date:   Sat, 25 Jun 2022 20:59:54 +0800
From:   Yanjun Zhu <yanjun.zhu@...ux.dev>
To:     "lizhijian@...itsu.com" <lizhijian@...itsu.com>,
        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


在 2022/6/7 16:32, lizhijian@...itsu.com 写道:
> 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.

Now there are some problems from Redhat and other Linux Vendors.

We had better focus on these problems.

Zhu Yanjun

>
>
> 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(-)
>>