Thread (7 messages) 7 messages, 5 authors, 2010-07-01

Re: [net-next-2.6 PATCH v2] x86: Align skb w/ start of cacheline on newer core 2/Xeon Arch

From: "H. Peter Anvin" <hpa@zytor.com>
Date: 2010-06-30 21:32:54

On 06/30/2010 02:28 PM, David Miller wrote:
From: Jeff Kirsher <redacted>
Date: Tue, 29 Jun 2010 21:38:00 -0700
quoted
From: Alexander Duyck <redacted>

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 <redacted>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Signed-off-by: Alexander Duyck <redacted>
Signed-off-by: Jeff Kirsher <redacted>
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 <hpa@zytor.com>

	-hpa
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