netdev - Re: [ethtool PATCH 4/4] v5 Add RX packet classification interface

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Message-ID: <4DC1A3A4.20900@chelsio.com>
Date:	Wed, 04 May 2011 12:06:12 -0700
From:	Dimitris Michailidis <dm@...lsio.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	Alexander Duyck <alexander.h.duyck@...el.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [ethtool PATCH 4/4] v5 Add RX packet classification interface

On 05/04/2011 11:05 AM, Ben Hutchings wrote:
> How about having ETHTOOL_GRXCLSRLCNT set a flag in the 'data' field to
> indicate that the driver can assign locations?  (We would have to
> specify that for compatibility with older kernels the application must
> initialise this filed to 0.)
> 
> rmgr_init() would then check for this flag.

I think this is a good suggestion if we want to support location selection by 
either the driver or ethtool.  I also think ethtool's assumption that it is the 
only allocator and can allocate race-free is fundamentally flawed (take two 
parallel ethtools).
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