netdev - Re: [RFC 2/2] shrink size of scatterlist on common i386/x86-64

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Date:	Thu, 05 Jul 2007 16:43:08 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...ux-foundation.org
Cc:	netdev@...r.kernel.org
Subject: Re: [RFC 2/2] shrink size of scatterlist on common i386/x86-64

From: Stephen Hemminger <shemminger@...ux-foundation.org>
Date: Thu, 05 Jul 2007 16:14:14 -0700

> The scatterlist only needs 16 bits for length/offset because
> PAGE_SIZE is 4K
> 
> Signed-off-by: Stephen Hemminger <shemminger@...ux-foundation.org>

Unfortunately I don't think this can be done, even on i386.

It is legal to use order!=0 pages and multi-page areas in a single
scatterlist entry.

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