netdev - Re: [PATCH v2] tcp: splice as many packets as possible at once

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Message-ID: <20090130221604.GD11381@gondor.apana.org.au>
Date:	Sat, 31 Jan 2009 09:16:04 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	jarkao2@...il.com, zbr@...emap.net, w@....eu, dada1@...mosbay.com,
	ben@...s.com, mingo@...e.hu, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, jens.axboe@...cle.com
Subject: Re: [PATCH v2] tcp: splice as many packets as possible at once

On Fri, Jan 30, 2009 at 01:42:27PM -0800, David Miller wrote:
> 
> Hmmm, Jarek's comments here made me realize that we might be
> able to do some hack with cooperation with SLAB.
> 
> Basically the idea is that if the page count of a SLAB page
> is greater than one, SLAB will not use that page for new
> allocations.
> 
> It's cheesy and the SLAB developers will likely barf at the
> idea, but it would certainly work.

I'm not going anywhere near that discussion :)

> 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.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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