[Intel-wired-lan] [PATCH v2 1/4] i40e: clean zero-copy XDP Tx ring on shutdown/reset

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at osuosl.org] On
> Behalf Of Björn Töpel
> Sent: Friday, September 7, 2018 1:19 AM
> To: ast at kernel.org; daniel at iogearbox.net; Kirsher, Jeffrey T
> <jeffrey.t.kirsher at intel.com>; intel-wired-lan at lists.osuosl.org;
> jakub.kicinski at netronome.com
> Cc: netdev at vger.kernel.org; Topel, Bjorn <bjorn.topel at intel.com>;
> magnus.karlsson at gmail.com; Karlsson, Magnus
> <magnus.karlsson at intel.com>
> Subject: [Intel-wired-lan] [PATCH v2 1/4] i40e: clean zero-copy XDP Tx ring on
> shutdown/reset
> 
> From: Björn Töpel <bjorn.topel at intel.com>
> 
> When the zero-copy enabled XDP Tx ring is torn down, due to configuration
> changes, outstandning frames on the hardware descriptor ring are queued
> on the completion ring.
> 
> The completion ring has a back-pressure mechanism that will guarantee that
> there is sufficient space on the ring.
> 
> Signed-off-by: Björn Töpel <bjorn.topel at intel.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_txrx.c   | 17 +++++++----
>  .../ethernet/intel/i40e/i40e_txrx_common.h    |  2 ++
>  drivers/net/ethernet/intel/i40e/i40e_xsk.c    | 30 +++++++++++++++++++
>  3 files changed, 43 insertions(+), 6 deletions(-)


Tested-by: Andrew Bowers <andrewx.bowers at intel.com>