netdev - [PATCH net-next 2.6] myri10ge: DCA update (resubmit)

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Message-ID: <4CA23038.3030808@myri.com>
Date:	Tue, 28 Sep 2010 14:13:12 -0400
From:	Andrew Gallatin <gallatin@...i.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev <netdev@...r.kernel.org>, Loic Prylli <loic@...i.com>
Subject: [PATCH net-next 2.6] myri10ge: DCA update (resubmit)

This patch contains the following DCA improvements to myri10ge:

1) Finally move myri10ge to use dca3 API

2) Disable PCIe relaxed ordering when enabling DCA on
     myri10ge.  This provides a performance boost on Nehalem
     based Xeons

3) Make sure to properly initialize NIC's DCA state when it is enabled,
     rather than giving the NIC a bogus tag (0) and waiting for
     the first received packet to trigger an update.  Not using a
     real tag can cause hardware exceptions on some motherboards
     when a CPU socket is empty.

3) Always update the cached CPU when our interrupt affinity changes
     so as to avoid excessive calls to dca3_get_tag()

Signed-off-by: Andrew Gallatin <gallatin@...i.com>
Signed-off-by: Loic Prylli <loic@...i.com>



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