netdev - Re: [PATCH v2 net-next 3/3] net/smc: Fallback when handshake workqueue congested

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Message-ID: <YfTDjXh8zP3WBAtg@TonyMac-Alibaba>
Date:   Sat, 29 Jan 2022 12:33:17 +0800
From:   Tony Lu <tonylu@...ux.alibaba.com>
To:     "D. Wythe" <alibuda@...ux.alibaba.com>
Cc:     kgraul@...ux.ibm.com, kuba@...nel.org, davem@...emloft.net,
        netdev@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-rdma@...r.kernel.org, matthieu.baerts@...sares.net
Subject: Re: [PATCH v2 net-next 3/3] net/smc: Fallback when handshake
 workqueue congested

On Fri, Jan 28, 2022 at 10:44:38PM +0800, D. Wythe wrote:
> From: "D. Wythe" <alibuda@...ux.alibaba.com>
> @@ -19,3 +19,15 @@ config SMC_DIAG

...

> +if SMC
> +
> +config SMC_AUTO_FALLBACK
> +	bool "SMC: automatic fallback to TCP"
> +	default y
> +	help
> +	  Allow automatic fallback to TCP accroding to the pressure of SMC-R
> +	  handshake process.
> +
> +	  If that's not what you except or unsure, say N.
> +endif

Using a netlink knob to control behavior with static key should be more
flexible. As I appended in the previous version of this patch.

Thank you,
Tony Lu