From: Tom Herbert <therbert@google.com>
Date: Wed, 5 May 2010 14:02:27 +0000 (+0000)
Subject: e1000e: save skb counts in TX to avoid cache misses
X-Git-Tag: v2.6.35-rc1~473^2~279
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9ed318d546a29d7a591dbe648fd1a2efe3be1180;p=pandora-kernel.git

e1000e: save skb counts in TX to avoid cache misses

In e1000_tx_map, precompute number of segements and bytecounts which
are derived from fields in skb; these are stored in buffer_info.  When
cleaning tx in e1000_clean_tx_irq use the values in the associated
buffer_info for statistics counting, this eliminates cache misses
on skb fields.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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