netdev - Re: [PATCH net-next-2.6] inetpeer: do not use zero refcnt for freed entries

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Message-Id: <20100615.214754.42801686.davem@davemloft.net>
Date:	Tue, 15 Jun 2010 21:47:54 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, paulmck@...ux.vnet.ibm.com
Subject: Re: [PATCH net-next-2.6] inetpeer: do not use zero refcnt for
 freed entries

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 16 Jun 2010 04:45:24 +0200

> [PATCH net-next-2.6] inetpeer: do not use zero refcnt for freed entries
> 
> Followup of commit aa1039e73cc2 (inetpeer: RCU conversion)
> 
> Unused inet_peer entries have a null refcnt.
> 
> Using atomic_inc_not_zero() in rcu lookups is not going to work for
> them, and slow path is taken.
> 
> Fix this using -1 marker instead of 0 for deleted entries.
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks Eric.
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