2017-01-24 13:35, Ferruh Yigit:

On 1/24/2017 7:34 AM, Jianfeng Tan wrote:

quoted

We announced ABI changes to remove iomem and ioport mapping in
igb_uio. But it has potential backward compatibility issue: cannot
run old version DPDK on modified igb_uio.

The purpose of this changes was to fix a bug: when DPDK app crashes,
those devices by igb_uio are not stopped either DPDK PMD driver or
igb_uio driver. We need to figure out new way to fix this bug.

Hi Jianfeng,

I believe it would be good to fix this potential defect.

Is "remove iomem and ioport" a must for that fix? If so, I suggest
re-think about it.

If I see correctly, dpdk1.8 and older uses igb_uio iomem files. So
backward compatibility is the possible issue for dpdk1.8 and older.
Since v1.8 two years old, I would prefer fixing defect instead of
keeping that backward compatibility.

Jianfeng, Thomas,

What do you think postponing this deprecation notice to next release,
instead of removing it, and discuss more?


And overall, if "remove iomem and ioport" is not a must for this fix, no
problem to remove deprecation notice.

I have no strong opinion here.
Jianfeng, do you agree with Ferruh?