doc: add known issue for i40e VF performance
authorQi Zhang <qi.z.zhang@intel.com>
Tue, 18 Jul 2017 09:52:14 +0000 (05:52 -0400)
committerFerruh Yigit <ferruh.yigit@intel.com>
Wed, 19 Jul 2017 08:59:39 +0000 (11:59 +0300)
commit365b1b4bc6ccbb59df0fa2d6708e2b30d7cea282
tree88c67e0a3c80986e808156a5667a2eb78a3a4588
parent30ad2bdb42e6d1da3eea4961b666064f9de3761c
doc: add known issue for i40e VF performance

VF performance is limited by the kernel PCI extended tag setting.
Update the document to explain the known issue and the workaround.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
doc/guides/nics/i40e.rst