[Intel-wired-lan] [next PATCH S37 11/15] i40e: Fix RSS to not be limited by the number of CPUs

Bowers, AndrewX andrewx.bowers at intel.com
Tue May 17 19:10:38 UTC 2016

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Bimmy Pujari
> Sent: Monday, May 16, 2016 10:27 AM
> To: intel-wired-lan at lists.osuosl.org
> Subject: [Intel-wired-lan] [next PATCH S37 11/15] i40e: Fix RSS to not be
> limited by the number of CPUs
> From: Catherine Sullivan <catherine.sullivan at intel.com>
> Limiting qcount to pf->num_lan_msix, effectively limits the RSS queues to
> only use the number of CPUs, and ignore all other queues. We don't want to
> do this. If the user has changed the RSS settings to use more queues then
> CPUS, we want to trust they know what they are doing and let them. More
> importantly, if we tell them that is what we did, we want to actually do it and
> allow traffic into all of the queues we have allocated. This does not change
> the default setting to initially allocate only the number of CPUS of queue
> pairs.
> Signed-off-by: Catherine Sullivan <catherine.sullivan at intel.com>
> Change-ID: Ie941a96e806e4bcd016addb4e17affb46770ada5
> ---
> Testing Hints: Make sure that RSS can hit all queues up to the maximum for
> XL710,X710,X722, including a NPAR nic.
>  drivers/net/ethernet/intel/i40e/i40e_main.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com
RSS not limited by number of CPUs

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