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Date:	Fri, 17 Oct 2014 11:53:00 -0700
From:	Eric Dumazet <>
To:	Alexander Duyck <>
Cc:	David Laight <David.Laight@...LAB.COM>,
	"" <>,
	David Miller <>,
	"" <>,
	"" <>,
	"" <>,
	"" <>
Subject: Re: [PATCH] net: use hardware buffer pool to allocate skb

On Fri, 2014-10-17 at 11:28 -0700, Alexander Duyck wrote:

> Yes, I am well aware of this bit.  That is my concern.  You increase the 
> size for truesize, it will cut the amount of queueing in half, and then 
> igb will start seeing drops when it has to deal with bursty traffic and 
> people will start to complain about a performance regression.  That is 
> the bit I want to avoid.

Then, what about addressing the issue for good, instead of working
around it ?

Don't worry, I will work on it.

We also are working on a direct placement in memory for TCP receive
path. (equivalent of sendfile() but for receiver), to avoid the need to 
hold payload in kernel memory (out of order queues)

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