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Date:	Wed, 30 Jun 2010 14:34:24 -0700 (PDT)
From:	David Miller <>
Subject: Re: [net-next-2.6 PATCH v2] x86: Align skb w/ start of cacheline
 on newer core 2/Xeon Arch

From: "H. Peter Anvin" <>
Date: Wed, 30 Jun 2010 14:32:33 -0700

> On 06/30/2010 02:28 PM, David Miller wrote:
>> From: Jeff Kirsher <>
>> Date: Tue, 29 Jun 2010 21:38:00 -0700
>>> From: Alexander Duyck <>
>>> x86 architectures can handle unaligned accesses in hardware, and it has
>>> been shown that unaligned DMA accesses can be expensive on Nehalem
>>> architectures.  As such we should overwrite NET_IP_ALIGN to resolve
>>> this issue.
>>> Cc: Thomas Gleixner <>
>>> Cc: Ingo Molnar <>
>>> Cc: "H. Peter Anvin" <>
>>> Cc:
>>> Signed-off-by: Alexander Duyck <>
>>> Signed-off-by: Jeff Kirsher <>
>> Can I get an x86'er ACK on this?  I can merge it in via net-next-2.6
>> which is probably most convenient for people who want to see the
>> networking performance effects of this change.
> Acked-by: H. Peter Anvin <>

Applied, thanks everyone.
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