netdev - Re: TCPBacklogDrops during aggressive bursts of traffic

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Message-ID: <1337102639.8512.1117.camel@edumazet-glaptop>
Date:	Tue, 15 May 2012 19:23:59 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	Kieran Mansley <kmansley@...arflare.com>, netdev@...r.kernel.org
Subject: Re: TCPBacklogDrops during aggressive bursts of traffic

On Tue, 2012-05-15 at 19:01 +0200, Eric Dumazet wrote:

> 
> napi_get_frags() could probably updated in net-next to use the first
> frag as skb->head to save 512 bytes per skb.

By the way GRO_MAX_HEAD definition is way too big, napi_get_frags()
allocates fat skbs (1280 bytes of overhead instead of 768 bytes)

This should be enough :

#define GRO_MAX_HEAD 128



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