netdev - Re: Copy data from one SKB to another

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Message-ID: <e92e3a770702240137p6c0b31b3r2b7ce0b4042fac4b@mail.gmail.com>
Date:	Sat, 24 Feb 2007 15:07:40 +0530
From:	"kalash nainwal" <nirvana.code@...il.com>
To:	"kristrev@...dent.matnat.uio.no" <kristrev@...dent.matnat.uio.no>
Cc:	netdev@...r.kernel.org, linux-net@...r.kernel.org
Subject: Re: Copy data from one SKB to another

On 2/22/07, kristrev@...dent.matnat.uio.no
<kristrev@...dent.matnat.uio.no> wrote:
> Hello,
>
> I am working on optimizing the TCP-code for a certain type of TCP-stream,
> and to make one of my optimizations work I need to copy data from one SKB
> (the data field of the skb) to another SKB (data field).
>
> Currently I am using memcpy, and it does what it is supposed to, but I am
> curious as to if there are any other (potentially faster/more efficient)
> ways of doing it. I have checked out the skb_add_data (used when you can
> copy data from the msg you are sending into the most recent skb added to
> the queue), but from what I can understand it only copies from userspace
> into kernelspace (whereas I need to copy kernel-kernel).
>
> Does anyone have any hints, suggestions, solutions or something else they
> think might help?
>
> Thanks,
> Kristian
>
> -

How about cloning? Is that an option?
-
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