Re: [PATCH v2 19/20] IB/rdmavt, IB/qib, IB/hfi1: Make percpu refcount optional for user MRs

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On Wed, Apr 05, 2017 at 08:09:16PM +0000, Marciniszyn, Mike wrote:
>  > Is there a another way we should be looking at for setting things like this?
> >
> > Use vendor channel interface to configure your driver.
> >
>
> What is that? configfs or something else?

An immediate answer without digging into your code is Matan's KABI work.
https://github.com/matanb10/linux/tree/abi-devel-latest

However, I have an question, how do you ensure that user memory has no
users without refcounts? Will it be possible to dereg the memory despite
the fact that there are users?

Thanks

>
> Mike

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