From: Maciej Sosnowski <maciej.sosnowski@intel.com>
Date: Thu, 26 Feb 2009 10:05:17 +0000 (+0100)
Subject: I/OAT: set tcp_dma_copybreak to 256k for I/OAT ver.3
X-Git-Tag: v2.6.29-rc8~61^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5de22343b2303b278ab562e5d166ffe306566d30;p=pandora-kernel.git

I/OAT: set tcp_dma_copybreak to 256k for I/OAT ver.3

Upcoming server platforms from Intel based on the Nehalem performance
have significantly improved CPU based copy performance.
However, the DMA engine can still be effective at higher I/O sizes
for TCP traffic and at this time copybreak
should be set to 256k for TCP traffic only.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

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