Re: [rdma-next 01/33] Revert "IB/core: Add flow control to the portmapper netlink calls"

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On Wed, Aug 02, 2017 at 09:58:56AM -0600, Jason Gunthorpe wrote:
> On Wed, Aug 02, 2017 at 06:44:38AM +0300, Leon Romanovsky wrote:
> > On Tue, Aug 01, 2017 at 01:58:40PM -0600, Jason Gunthorpe wrote:
> > >
> > > I'm not sure why there is so much noise about this - yes, iwpmd is
> > > really weird, but it is a UAPI, we can't change it and we can't demand
> > > they change.
> >
> > If you claim that it is UAPI change, we MUST revert this patch, because
> > reverted patch CHANGED UAPI.
>
> That is not how I read it.. The UAPI was intended to be lossless and
> there was a kernel bug that made it more lossy than expected, that is
> what that original patch was addressing.

The catch 22 here is in the fact that there is no kernel bug. I assume
and according to Bart's questions (but better to ask him) he thinks the same,
that the bug is in protocol layer and/or user space part. There is no
visible kernel bug.

This is exactly what we are asking from Chien to provide the details.

Thanks

>
> Jason

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