netdev - Re: TSO not 10G friendly if peer is close enough

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Message-ID: <1334718038.2472.76.camel@edumazet-glaptop>
Date:	Wed, 18 Apr 2012 05:00:38 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	alexander.h.duyck@...el.com, jeffrey.t.kirsher@...el.com,
	donald.c.skidmore@...el.com, gregory.v.rose@...el.com,
	john.r.fastabend@...el.com, jesse.brandeburg@...el.com,
	netdev@...r.kernel.org
Subject: Re: TSO not 10G friendly if peer is close enough

On Tue, 2012-04-17 at 17:47 -0400, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Tue, 17 Apr 2012 23:38:42 +0200
> 
> > Hmm... maybe tcp_trim_head should not trim but only update an offset in
> > skb... With some luck, offset can reach skb->len when all data is
> > ACKnowledged...
> 
> This is definitely the way to fix this.  Just essentially defer all
> the page operations until later when the entire SKB is consumed.

Yes, I'll implement this today.

Thanks 


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