From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH 1/3] i40e: enable extended tag
Date: Fri, 22 Jan 2016 11:26:31 +0100
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References: <1450665486-8335-1-git-send-email-helin.zhang@intel.com>
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To: Helin Zhang <helin.zhang@intel.com>
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2015-12-21 10:38, Helin Zhang:
> PCIe feature of 'Extended Tag' is important for 40G performance.
> It adds its enabling during each port initialization, to ensure
> the high performance.

If it's so important, why the values are not documented?
Please start to fill a file doc/guides/nics/i40e.rst to explain
how the device works.
Thanks