linux-kernel - Re: [PATCH] IGMP: Inhibit reports for local multicast groups

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Message-ID: <CAHA+R7Mv=-QoeRuY1nPEV55o5MMekeW+GqOuU+dh18a_5+iYOg@mail.gmail.com>
Date:	Fri, 28 Aug 2015 14:19:56 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Philip Downey <pdowney@...cade.com>
Cc:	David Miller <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] IGMP: Inhibit reports for local multicast groups

On Thu, Aug 27, 2015 at 8:46 AM, Philip Downey <pdowney@...cade.com> wrote:
> IGMP reports for local multicast groups can now be optionally
> inhibited by means of a system control variable (by setting the value
> to zero) e.g.:
>     echo 0 > /proc/sys/net/ipv4/igmp_link_local_mcast_reports
>
> To retain backwards compatibility the previous behaviour is retained
> by default on system boot or reverted by setting the value back to
> non-zero e.g.:
>     echo 1 >  /proc/sys/net/ipv4/igmp_link_local_mcast_reports
>

Please document it in Documentation/networking/ip-sysctl.txt.
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