Re: [PATCH net] net/smc: fix sk_refcnt underflow on linkdown and fallback

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To: Dust Li <dust.li@xxxxxxxxxxxxxxxxx>, Ursula Braun <ubraun@xxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH net] net/smc: fix sk_refcnt underflow on linkdown and fallback
From: Karsten Graul <kgraul@xxxxxxxxxxxxx>
Date: Wed, 10 Nov 2021 14:14:56 +0100
Cc: Tony Lu <tonylu@xxxxxxxxxxxxxxxxx>, guwen@xxxxxxxxxxxxxxxxx, Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>, linux-s390@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx
In-reply-to: <20211110070234.60527-1-dust.li@linux.alibaba.com>
Organization: IBM Deutschland Research & Development GmbH
References: <20211110070234.60527-1-dust.li@linux.alibaba.com>
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0

On 10/11/2021 08:02, Dust Li wrote:
> We got the following WARNING when running ab/nginx
> test with RDMA link flapping (up-down-up).
> The reason is when smc_sock fallback and at linkdown
> happens simultaneously, we may got the following situation:
> 
<snip>


Acked-by: Karsten Graul <kgraul@xxxxxxxxxxxxx>

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- [PATCH net] net/smc: fix sk_refcnt underflow on linkdown and fallback
  - From: Dust Li

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