netdev - Re: [PATCH 6/13] bridge: Add core IGMP snooping support

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Message-ID: <20100310140729.GA25704@gondor.apana.org.au>
Date:	Wed, 10 Mar 2010 22:07:29 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Stephen Hemminger <shemminger@...tta.com>
Subject: Re: [PATCH 6/13] bridge: Add core IGMP snooping support

On Wed, Mar 10, 2010 at 05:13:18AM -0800, Paul E. McKenney wrote:
>
> If CONFIG_PROVE_RCU is set, rcu_dereference() checks for rcu_read_lock()
> and rcu_dereference_bh() checks for either rcu_read_lock_bh() or BH
> being disabled.  Yes, this is a bit restrictive, but there are a few too
> many to check by hand these days.

Fair enough.  We should get those fixed then.  In fact I reckon
most of them should be using the BH variant so we might be able
to kill a few rcu_read_lock's which would be a real gain.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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