Re: [dpdk-dev] [PATCH v2 1/3] i40e: enable extended tag

[Bruce Richardson <bruce.richardson@intel.com>]

On Mon, Feb 22, 2016 at 11:59:43AM +0800, Helin Zhang wrote:
> PCIe feature of 'Extended Tag' is important for 40G performance.
> It adds its enabling during each port initialization, to ensure
> the high performance.
> 
> Signed-off-by: Helin Zhang <helin.zhang@intel.com>
> ---
>  doc/guides/rel_notes/release_16_04.rst |  6 ++++
>  drivers/net/i40e/i40e_ethdev.c         | 65 ++++++++++++++++++++++++++++++++--
>  2 files changed, 68 insertions(+), 3 deletions(-)
> 
> v2:
>  - Changed the type of return value of i40e_enable_extended_tag() to 'void'.
> 
> diff --git a/doc/guides/rel_notes/release_16_04.rst b/doc/guides/rel_notes/release_16_04.rst
> index 5786f74..bed5779 100644
> --- a/doc/guides/rel_notes/release_16_04.rst
> +++ b/doc/guides/rel_notes/release_16_04.rst
> @@ -46,6 +46,12 @@ This section should contain new features added in this release. Sample format:
>  
>  * **Added vhost-user live migration support.**
>  
> +* **i40e: Enabled extended tag.**
> +
> +  It enabled extended tag by checking and writing corresponding PCI config
> +  space bytes, to boost the performance. In the meanwhile, it deprecated the
> +  legacy way via reading/writing sysfile supported by kernel module of igb_uio.
> +

Hi Helin,

does this really need to go into the release notes? Is it a user-visible change
that affects the user experience in any way?

/Bruce