Re: [dpdk-dev] [PATCH 3/3] doc: remove ABI changes in igb_uio

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2017-01-24 13:35, Ferruh Yigit:
> On 1/24/2017 7:34 AM, Jianfeng Tan wrote:
> > 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?