netdev - Re: [net-next 09/15] i40e: use priv flags to control packet split

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Date:	Wed, 9 Dec 2015 01:33:52 +0200
From:	Or Gerlitz <gerlitz.or@...il.com>
To:	Jesse Brandeburg <jesse.brandeburg@...il.com>
Cc:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	David Miller <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>,
	"nhorman@...hat.com" <nhorman@...hat.com>,
	"sassmann@...hat.com" <sassmann@...hat.com>,
	"jogreene@...hat.com" <jogreene@...hat.com>
Subject: Re: [net-next 09/15] i40e: use priv flags to control packet split

On Wed, Dec 9, 2015 at 1:24 AM, Jesse Brandeburg
<jesse.brandeburg@...il.com> wrote:
> On Sat, Dec 5, 2015 at 1:25 PM, Or Gerlitz <gerlitz.or@...il.com> wrote:
>> HDS is a generic feature,and even if you think only Intel hardware is
>> the only hardware that supports that, you have multiple drivers..
>> right? why not go the right way of adding new netdev feature and
>> enable/disable it through the conventional ethtool feature on/off
>> directive?
>
> In this case, the return on the investment in the new feature is too
> low, IMO. If your hardware also supports this feature we can discuss
> adding this via ethtool, and I'd be glad to review any patches, and
> implement for Intel devices if necessary.

Wasn't sure to follow on the ROI comment, but anyway, we can renew
this discussion if/when Mellanox and/or more HWs to open that. BTW do
you iSCSI/NFS or alike benchmark of (say) 4KB payload to demo the gain
of the patch? where does your HW does the HDSplit in case of these or
other IP based storage protocols?

Or.

Or.
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