On 1/18/2017 1:36 AM, Ferruh Yigit wrote:

On 1/17/2017 5:00 PM, Wu, Jingjing wrote:

quoted

quoted

-----Original Message-----
From: Yigit, Ferruh
Sent: Tuesday, January 17, 2017 4:31 AM
To: Guo, Jia <redacted>; Zhang, Helin <redacted>; Wu,
Jingjing [off-list ref]
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2] doc: add known uio_pci_generic issue
for i40e

On 2/12/2016 4:39 PM, Jeff Guo wrote:

quoted

From: "Guo, Jia" <redacted>

When bind with uio_pci_generic in X710/XL710/XXV710, the result is
failed. uio_pci_generic is not supported by X710/XL710/XXV710.

Hi Jeff,

There is a Linux commit causing the issue, right. Commit done because of the
reasons mentioned in "Description". Do you think does it make sense to note
that Linux commit, and Linux kernel version that has been introduced?

Hi, Ferruh
At beginning, we found this issue in latest kernel version, such as kernel 4.7.9 on fedora24.
But later, we observed that this issue also exist on REL7.3.

It won't work custom kernels, but upstream kernel version. If you think
that will be confusion, that is OK.

What do you think just adding Linux kernel commit information, can it be
useful?

yes, the root cause of the issue is the HW' errata, but not the linux 
kernel commit,  because even without the linux kernel commit and 
uio_pci_generic can even be bind and use,  but still will cause other 
interrupt status issue. fix this interrupt status issue that is the 
purpose of the linux kernel commit.
so i think add linux kernel commit information in dpdk can be somehow to 
useful for track issue, but if let the kernel issue be manage by kernel 
org must be better.
ferruh and jingjing, Do you all agree with me. beg on your feedback.

quoted

So, it may be a little difficult to us to figure out exactly which kernel version
doesn't support. And the root cause is the HW's errata which makes uio_pci_generic
cannot be used on XL710 series NICs.

Thanks
Jingjing