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

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Message-ID: <20090119101924.GA1881@gondor.apana.org.au>
Date:	Mon, 19 Jan 2009 21:19:24 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	w@....eu, jarkao2@...il.com, zbr@...emap.net, 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] tcp: splice as many packets as possible at once

On Sun, Jan 18, 2009 at 10:19:08PM -0800, David Miller wrote:
> 
> Actually, I see, the myri10ge driver does put up to
> 64 bytes of the initial packet into the linear area.
> If the IPV4 + TCP headers are less than this, you will
> hit the corruption case even with the myri10ge driver.

I thought splice only mapped the payload areas, no?

So we should probably test with a non-paged driver to be totally
sure.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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