netdev - Re: TCPBacklogDrops during aggressive bursts of traffic

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Message-ID: <1337791189.3361.3029.camel@edumazet-glaptop>
Date:	Wed, 23 May 2012 18:39:49 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Alexander Duyck <alexander.h.duyck@...el.com>
Cc:	Kieran Mansley <kmansley@...arflare.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	netdev@...r.kernel.org
Subject: Re: TCPBacklogDrops during aggressive bursts of traffic

On Wed, 2012-05-23 at 18:12 +0200, Eric Dumazet wrote:

> With current driver, a MTU=1500 frame uses :
> 
> sk_buff (256 bytes)
> skb->head : 1024 bytes  (or more exaclty now : 512 + 384)

By the way, NET_SKB_PAD adds 64 bytes so its 64 + 512 + 384 = 960




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