linux-kernel - Re: [PATCH net] net/smc: Stop the CLC flow if no link to map buffers on

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Message-Id: <166384441514.19700.3392239951153800895.git-patchwork-notify@kernel.org>
Date:   Thu, 22 Sep 2022 11:00:15 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Wen Gu <guwen@...ux.alibaba.com>
Cc:     kgraul@...ux.ibm.com, wenjia@...ux.ibm.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        linux-s390@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net/smc: Stop the CLC flow if no link to map buffers on

Hello:

This patch was applied to netdev/net.git (master)
by Paolo Abeni <pabeni@...hat.com>:

On Tue, 20 Sep 2022 14:43:09 +0800 you wrote:
> There might be a potential race between SMC-R buffer map and
> link group termination.
> 
> smc_smcr_terminate_all()     | smc_connect_rdma()
> --------------------------------------------------------------
>                              | smc_conn_create()
> for links in smcibdev        |
>         schedule links down  |
>                              | smc_buf_create()
>                              |  \- smcr_buf_map_usable_links()
>                              |      \- no usable links found,
>                              |         (rmb->mr = NULL)
>                              |
>                              | smc_clc_send_confirm()
>                              |  \- access conn->rmb_desc->mr[]->rkey
>                              |     (panic)
> 
> [...]

Here is the summary with links:
  - [net] net/smc: Stop the CLC flow if no link to map buffers on
    https://git.kernel.org/netdev/net/c/e738455b2c6d

You are awesome, thank you!
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