netdev - Re: [Patch net-next 2/3] bridge: only expire the mdb entry when query is received

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Message-ID: <1367291857.3216.2.camel@cr0>
Date:	Tue, 30 Apr 2013 11:17:37 +0800
From:	Cong Wang <amwang@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Herbert Xu <herbert@...dor.hengli.com.au>,
	Stephen Hemminger <stephen@...workplumber.org>,
	"David S. Miller" <davem@...emloft.net>,
	Adam Baker <linux@...er-net.org.uk>
Subject: Re: [Patch net-next 2/3] bridge: only expire the mdb entry when
 query is received

On Mon, 2013-04-29 at 15:26 +0800, Cong Wang wrote:
> From: Cong Wang <amwang@...hat.com>
> 
> Currently we arm the expire timer when the mdb entry is added,
> however, this causes problem when there is no querier sent
> out after that.
> 
> So we should only arm the timer when a corresponding query is
> received, as suggested by Herbert.

One problem with this solution is that the temp mdb entry will no longer
be expired automatically any more, since no query no timer.

I am wondering if we should find other way to fix it, for example,
touching the timer as long as there is multicast traffic (non-IGMP).

Thanks!

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