netdev - Re: New commands to configure IOV features

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Date:	Mon, 9 Jul 2012 19:39:15 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Greg Rose <gregory.v.rose@...el.com>
CC:	Yuval Mintz <yuvalmin@...adcom.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: New commands to configure IOV features

On Tue, 2012-06-26 at 10:19 -0700, Greg Rose wrote:
> On Tue, 26 Jun 2012 15:21:55 +0300
> Yuval Mintz <yuvalmin@...adcom.com> wrote:
> 
> > On 05/07/2012 06:16 PM, Greg Rose wrote:
> > 
> > > On Mon, 7 May 2012 14:17:54 +0300
> > > Yuval Mintz <yuvalmin@...adcom.com> wrote:
> > > 
> > >> I've tried to figure out if there was a standard interface
> > >> (ethtool/iproute) through which a user could configure the number
> > >> of vfs in his system.
> > >>
> > >> I've seen the RFC suggested in
> > >> http://markmail.org/thread/qblfcv7zbxsxp7q6, and
> > >> http://markmail.org/thread/fw54dcppmxuxoe6n, but failed to see any
> > >> later references to it (commits or further discussion on this
> > >> topic).
> > >>
> > >> How exactly are things standing with these RFCs? Were they
> > >> abandoned?
> > > 
> > > The only way to configure the number of VFs continues to be through
> > > the max_vfs module parameter.  I've got a patch to do it through
> > > ethtool sitting on the back burner but due to other requirements of
> > > my day job I've not been able to work on it since last fall.
> > > 
> > > - Greg
> > 
> > 
> > Hi Ben,
> > 
> > If I want to pick the RFCs and add support for configuring the number
> > of VFs - do you think ethtool's the right place for such added
> > support?
> > 
> > I'm asking since as far as I can see, ethtool (today) doesn't contain
> > any features related to virtual functions.
> 
> I think a PCI utility tool would be better, SR-IOV is not limited to
> network devices.  That's one of the reasons I dropped the RFC.  I
> haven't gotten back to the idea since then due to my day job keeping me
> pretty busy.

For what it's worth, I agree with this.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
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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