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Date:	Sat, 13 Apr 2013 20:04:42 -0400
From:	Willem de Bruijn <>
To:	David Miller <>
Cc:	Daniel Borkmann <>,
	Paul Chavent <>,
	Richard Cochran <>,
	Eric Dumazet <>,,,,
Subject: Re: [PATCH] net-packet: tx timestamping on tpacket ring

On Sat, Apr 13, 2013 at 6:47 PM, David Miller <> wrote:
> From: Daniel Borkmann <>
> Date: Sun, 14 Apr 2013 00:18:48 +0200
>>> +            flush_dcache_page(pgv_to_page(&h1->tp_sec));
>>> +            flush_dcache_page(pgv_to_page(&h1->tp_usec));
>> Hmm, not sure, but could we also flush the dcache only once?
> Indeed, I truly hope that headers never straddle pages.

I should have checked the alignment restrictions on frames. Frames
must be a multiple of 16 B as well as larger than the header (obviously),
so this can indeed never happen.
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