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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH v2] tcp: splice as many packets as possible at once
Date: Mon, 02 Feb 2009 00:18:54 -0800 (PST)
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From: Jarek Poplawski <jarkao2@gmail.com>
Date: Mon, 2 Feb 2009 08:08:55 +0000

> On Sat, Jan 31, 2009 at 09:16:04AM +1100, Herbert Xu wrote:
> > On Fri, Jan 30, 2009 at 01:42:27PM -0800, David Miller wrote:
> ...
> > > Back to real life, I think long term the thing to do is to just do the
> > > cached page allocator thing we'll be doing after Jarek's socket page
> > > patch is integrated, and for best performance the driver has to
> > > receive it's data into pages, only explicitly pulling the ethernet
> > > header into the linear area, like NIU does.
> > 
> > Yes that sounds like the way to go.
> 
> Looks like a lot of changes in drivers, plus: would it work with jumbo
> frames? I wonder why the linear area can't be allocated as paged, and
> freed with put_page() instead of kfree(skb->head) in skb_release_data().

Allocating 4096 or 8192 bytes for a 1500 byte frame is wasteful.