netdev - Re: [PATCH] Multiqueue macvtap driver

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Message-Id: <1280755743.2121.2.camel@achroite.uk.solarflarecom.com>
Date:	Mon, 02 Aug 2010 14:29:03 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Krishna Kumar2 <krkumar2@...ibm.com>
Cc:	David Miller <davem@...emloft.net>, arnd@...db.de, mst@...hat.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH] Multiqueue macvtap driver

On Mon, 2010-08-02 at 18:07 +0530, Krishna Kumar2 wrote:
> Thanks Ben & Dave. A question though - which of the following
> is preferable for the macvtap driver:
> 
> 1. Calculate flow and use that to find a queue; or
> 2. First check if skb_rx_queue_recorded is true and if so use
>     that; otherwise calculate the flow as in #1.
> 
> I guess #1 is better, since packets for a single flow will go to the
> same queue even if they arrive on different rxqs of a mq driver.
> But I want to make sure.
[...]

#2 is right.  Just as macvtap should provide a stable flow to RX-queue
mapping, so should the drivers it interfaces with.

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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