netdev - Re: [PATCH 1/3] ixgbe: fix dca issue with relaxed ordering turned on

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Message-Id: <20090119.165516.165485763.davem@davemloft.net>
Date:	Mon, 19 Jan 2009 16:55:16 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, jeff@...zik.org,
	donald.c.skidmore@...el.com, peter.p.waskiewicz.jr@...el.com
Subject: Re: [PATCH 1/3] ixgbe: fix dca issue with relaxed ordering turned
 on

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Mon, 19 Jan 2009 16:11:05 -0800

> The is an issue where setting Relaxed Ordering (RO) bit
> (in a PCI-E write transaction) on 82598 causing the chipset
> to drop DCA hints.  This patch forces RO not to be set for
> descriptors as well as payload.  This will only be in effect
> while DCA is enabled and no performance difference was
> noticed in testing.
> 
> Signed-off-by: Don Skidmore <donald.c.skidmore@...el.com>
> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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