netdev - Re: [Patch net-next v1 3/3] igmp: convert RTNL lock to a spinlock

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Message-ID: <20130604205244.7d9436b2@nehalam.linuxnetplumber.net>
Date:	Tue, 4 Jun 2013 20:52:44 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Cong Wang <amwang@...hat.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>
Subject: Re: [Patch net-next v1 3/3] igmp: convert RTNL lock to a spinlock

On Wed,  5 Jun 2013 11:33:31 +0800
Cong Wang <amwang@...hat.com> wrote:

> From: Cong Wang <amwang@...hat.com>
> 
> It is not necessary to hold RTNL lock to protect mc_list,
> at least IPv6 mcast is using a local spinlock, IPv4 can do
> this too. This patch converts RTNL lock+RCU to spinlock+RCU,
> so that vxlan does not need to release RTNL lock before
> calling mcast API's.
> 
> Cc: Stephen Hemminger <stephen@...workplumber.org>
> Cc: "David S. Miller" <davem@...emloft.net>
> Signed-off-by: Cong Wang <amwang@...hat.com>

Not necessary, I have an alternate fix for vxlan.

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