netdev - Re: [PATCH net-next-2.6] inetpeer: restore small inet

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Message-Id: <20100616.115618.71114885.davem@davemloft.net>
Date:	Wed, 16 Jun 2010 11:56:18 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6] inetpeer: restore small inet_peer
 structures

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 16 Jun 2010 16:52:13 +0200

> Addition of rcu_head to struct inet_peer added 16bytes on 64bit arches.
> 
> Thats a bit unfortunate, since old size was exactly 64 bytes.
> 
> This can be solved, using an union between this rcu_head an four fields,
> that are normally used only when a refcount is taken on inet_peer.
> rcu_head is used only when refcnt=-1, right before structure freeing.
> 
> Add a inet_peer_refcheck() function to check this assertion for a while.
> 
> We can bring back SLAB_HWCACHE_ALIGN qualifier in kmem cache creation.
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks Eric.
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