Re: [dpdk-dev] [PATCH v3 0/2] IOPL related fixes

[Thomas Monjalon <thomas@monjalon.net>]

23/11/2018 21:07, Kevin Traynor:
> On 11/23/2018 04:25 PM, Maxime Coquelin wrote:
> > 
> > 
> > On 11/23/18 4:53 PM, Ilya Maximets wrote:
> >> On 23.11.2018 18:41, Maxime Coquelin wrote:
> >>> Hi,
> >>>
> >>> On 11/23/18 4:39 PM, Ilya Maximets wrote:
> >>>> Patches primary targeted to fix OVS unit test failures with
> >>>> DPDK 18.11 due to following error:
> >>>>       'IOPL call failed - cannot use virtio PMD'.
> >>>
> >>> You mention v18.11, do you mean this is a regression?
> >>
> >> Kind of. But not really a bug. It's just a message that shows up
> >> every time you starting the app as a non-root user.
> >>
> >> The message itself was introduced long time ago, but it wasn't
> >> printed for unclear reasons. It's probably some change in logging
> >> subsystem uncovered it.
> >>
> >> I just checked and found that message appears starting from v18.02.
> >> But OVS stuck with 17.11 LTS where this message exists, but not
> >> printed for some reason. That's why this wasn't an issue previously.
> > 
> > Thanks for the clarification.
> > In that case, we may want it in v18.11 LTS, but I think it can wait or
> > v18.11.1.
> 
> It would be better if it can be in 18.11. Upstream OVS will point at a
> release tarball, and at present an 18.11.1 release is not due until
> mid-January. If it's too late for 18.11, alternatively we could do an
> earlier 18.11.1 release.

I won't take any risk at this stage.
The memory of the headaches we had in the past with iopl is too much strong.
The real change of this patch is to register the PMD even without successful iopl.
I would like to be sure it won't cause any regression.