netdev - Re: [PATCH 1/2] bonding: fix incorrect transmit queue offset

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Date:	Wed, 23 Feb 2011 23:37:49 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	David Miller <davem@...emloft.net>
Cc:	kernel@...uxace.com, andy@...yhouse.net, netdev@...r.kernel.org,
	fubar@...ibm.com
Subject: Re: [PATCH 1/2] bonding: fix incorrect transmit queue offset

On Wed, 2011-02-23 at 15:13 -0800, David Miller wrote:
> From: Phil Oester <kernel@...uxace.com>
> Date: Wed, 23 Feb 2011 15:08:44 -0800
> 
> > On Wed, Feb 23, 2011 at 02:42:49PM -0500, Andy Gospodarek wrote:
> >> + * destination queue.  Using a helper function skips the a call to
> > 
> > s/the a/a/ or s/the a/the/
> > 
> >> +     while (txq >= dev->real_num_tx_queues) {
> >> +             /* let the user know if we do not have enough tx queues */
> >> +             if (net_ratelimit())
> >> +                     pr_warning("%s selects invalid tx queue %d.  Consider"
> >> +                                " setting module option tx_queues > %d.",
> >> +                                dev->name, txq, dev->real_num_tx_queues);
> >> +             txq -= dev->real_num_tx_queues;
> >> +     }
> > 
> > Think this would be better as a WARN_ONCE, as otherwise syslog will still
> > get flooded with this - even when ratelimited.  See get_rps_cpu in 
> > net/core/dev.c as an example.o
> 
> Agreed.

This shouldn't WARN at all.  It is perfectly valid (though non-optimal)
to have different numbers of queues on two different multiqueue devices.

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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