netdev - Re: [PATCH v3] net: don't reallocate skb->head unless the current one hasn't the needed extra size or is shared

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Message-Id: <20101203.094739.35049271.davem@davemloft.net>
Date:	Fri, 03 Dec 2010 09:47:39 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	xiaosuo@...il.com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH v3] net: don't reallocate skb->head unless the current
 one hasn't the needed extra size or is shared

From: Changli Gao <xiaosuo@...il.com>
Date: Tue, 30 Nov 2010 16:48:46 +0800

> skb head being allocated by kmalloc(), it might be larger than what
> actually requested because of discrete kmem caches sizes. Before
> reallocating a new skb head, check if the current one has the needed
> extra size.
> 
> Do this check only if skb head is not shared.
> 
> Signed-off-by: Changli Gao <xiaosuo@...il.com>
> Cc: Eric Dumazet <eric.dumazet@...il.com>

Eric, ACK?
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