netdev - Re: [PATCH net-next v5 2/5] net/smc: Limit backlog connections

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Date:   Wed, 9 Feb 2022 08:56:41 +0100
From:   Karsten Graul <kgraul@...ux.ibm.com>
To:     "D. Wythe" <alibuda@...ux.alibaba.com>
Cc:     kuba@...nel.org, davem@...emloft.net, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: [PATCH net-next v5 2/5] net/smc: Limit backlog connections

On 09/02/2022 08:11, D. Wythe wrote:
> 
> There are indirectly limits on smc accept queue with following code.
> 
> +    if (sk_acceptq_is_full(&smc->sk)) {
> +        NET_INC_STATS(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
> +        goto drop;
> +    }
> 
> 
> In fact, we treat the connections in smc accept queue as Full establisted connection. As I wrote in patch commits, there are trade-offs to this implemets.
> 

Thanks for the clarification, I got your point. You refer to the call to sk_acceptq_added()
in smc_accept_enqueue().