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Date: Sat, 13 Apr 2013 20:04:42 -0400 From: Willem de Bruijn <willemb@...gle.com> To: David Miller <davem@...emloft.net> Cc: Daniel Borkmann <dborkman@...hat.com>, Paul Chavent <paul.chavent@...ra.fr>, Richard Cochran <richardcochran@...il.com>, Eric Dumazet <edumazet@...gle.com>, daniel.borkmann@....ee.ethz.ch, xemul@...allels.com, ebiederm@...ssion.com, netdev@...r.kernel.org Subject: Re: [PATCH] net-packet: tx timestamping on tpacket ring On Sat, Apr 13, 2013 at 6:47 PM, David Miller <davem@...emloft.net> wrote: > From: Daniel Borkmann <dborkman@...hat.com> > 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. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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