netdev - Re: [PATCH net-next-2.6 3/5] net: RPS: Enable hardware acceleration of RFS

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Date:	Mon, 24 Jan 2011 15:01:49 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	bhutchings@...arflare.com
Cc:	netdev@...r.kernel.org, linux-net-drivers@...arflare.com,
	therbert@...gle.com
Subject: Re: [PATCH net-next-2.6 3/5] net: RPS: Enable hardware
 acceleration of RFS

From: Ben Hutchings <bhutchings@...arflare.com>
Date: Wed, 19 Jan 2011 21:03:53 +0000

> Allow drivers for multiqueue hardware with flow filter tables to
> accelerate RFS.  The driver must:
> 
> 1. Set net_device::rx_cpu_rmap to a cpu_rmap of the RX completion
> IRQs (in queue order).  This will provide a mapping from CPUs to the
> queues for which completions are handled nearest to them.
> 
> 2. Implement net_device_ops::ndo_rx_flow_steer.  This operation adds
> or replaces a filter steering the given flow to the given RX queue, if
> possible.
> 
> 3. Periodically remove filters for which rps_may_expire_flow() returns
> true.
> 
> Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>

Applied.
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