Subject: Re: [PATCH v2 net-next 1/4] net: implement support for low latency socket polling

From: Andi Kleen <[email-masked]>
Date: Mon, 20 May 2013 18:22:27 +0200

> diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
> index f98ca63..cfcf0ea 100644
> --- a/Documentation/networking/ip-sysctl.txt
> +++ b/Documentation/networking/ip-sysctl.txt
> @@ -19,6 +19,11 @@ ip_no_pmtu_disc - BOOLEAN
>  	Disable Path MTU Discovery.
>  	default FALSE
>  
> +ip_low_latency_poll - INTEGER
> +	Low latency busy poll timeout. (needs CONFIG_INET_LL_RX_POLL)
> +	Approximate time in ms to spin waiting for packets on the device queue.
> +	default 0

Can you document the suggested value here?

Also I would add something like "may increase power usage"

The other thing I would add is a linuxmib statistic counter so that
we can see the polling happens.

-Andi
-- 
[email-masked] -- Speaking for myself only.

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