linux-kernel - Re: [PATCH net-next-2.6 V2] igmp: RCU conversion of in_dev->mc

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Message-ID: <20101113064421.GE3837@hack>
Date:	Sat, 13 Nov 2010 14:44:21 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Américo Wang <xiyou.wangcong@...il.com>,
	Cypher Wu <cypher.w@...il.com>, linux-kernel@...r.kernel.org,
	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-next-2.6 V2] igmp: RCU conversion of in_dev->mc_list

>
>Here is an updated version.
>
>[PATCH net-next-2.6 V2] igmp: RCU conversion of in_dev->mc_list
>
>in_dev->mc_list is protected by one rwlock (in_dev->mc_list_lock).
>
>This can easily be converted to a RCU protection.
>
>Writers hold RTNL, so mc_list_lock is removed, not replaced by a
>spinlock.

Ah, this saves much work.

>
>Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
>Cc: Cypher Wu <cypher.w@...il.com>
>Cc: Américo Wang <xiyou.wangcong@...il.com>

I just did a quick look, it looks good to me.

Thanks!
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