netdev - Re: [RFC net-next 01/14] Add Default

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Message-ID: <1340127678.2486.18.camel@lb-tlvb-eilong.il.broadcom.com>
Date:	Tue, 19 Jun 2012 20:41:18 +0300
From:	"Eilon Greenstein" <eilong@...adcom.com>
To:	"Alexander Duyck" <alexander.h.duyck@...el.com>
cc:	"Yuval Mintz" <yuvalmin@...adcom.com>, netdev@...r.kernel.org,
	davem@...emloft.net
Subject: Re: [RFC net-next 01/14] Add Default

On Tue, 2012-06-19 at 09:37 -0700, Alexander Duyck wrote:
> On 06/19/2012 08:13 AM, Yuval Mintz wrote:
> > Signed-off-by: Yuval Mintz <yuvalmin@...adcom.com>
> > Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
> > ---
> >  include/linux/etherdevice.h |    5 ++++-
> >  1 files changed, 4 insertions(+), 1 deletions(-)
> >
> > diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
> > index 3d406e0..bb1ecaf 100644
> > --- a/include/linux/etherdevice.h
> > +++ b/include/linux/etherdevice.h
> > @@ -44,7 +44,10 @@ extern int eth_mac_addr(struct net_device *dev, void *p);
> >  extern int eth_change_mtu(struct net_device *dev, int new_mtu);
> >  extern int eth_validate_addr(struct net_device *dev);
> >  
> > -
> > +/* The maximal number of RSS queues a driver should have unless configured
> > + * so explicitly.
> > + */
> > +#define DEFAULT_MAX_NUM_RSS_QUEUES (8)
> >  
> >  extern struct net_device *alloc_etherdev_mqs(int sizeof_priv, unsigned int txqs,
> >  					    unsigned int rxqs);
> I'm not a big fan of just having this as a fixed define in the code.  It
> seems like it would make much more sense to have this in the Kconfig
> somewhere as a range value if you plan on making this changeable in the
> future.

My original suggestion was a kernel command line parameter, but Dave was
less than enthusiastic. If you will follow the original thread, you can
probably understand why I decided to adopt Dave's constant approach
without suggesting Kconfig:
http://marc.info/?l=linux-netdev&m=133992386010982&w=2

However, 8 is not a holy number - I'm open for suggestions.

Thanks,
Eilon


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