On Sun, Sep 11, 2016 at 03:34:21PM +0200, Christoph Hellwig wrote:
> On Sat, Sep 10, 2016 at 11:01:51AM -0600, Jason Gunthorpe wrote:
> > Sadly, it isn't a step backwards, it is status quo - at least as far
> > as the uapi is concerned.
>
> Sort of, see below:
>
> > struct mlx5_create_cq {
> > struct ibv_create_cq ibv_cmd;
> > __u64 buf_addr;
> > __u64 db_addr;
> > __u32 cqe_size;
> > };
> >
> > struct iwch_create_cq {
> > struct ibv_create_cq ibv_cmd;
> > uint64_t user_rptr_addr;
> > };
> >
> > Love to hear ideas on a way forward that doesn't involve rewriting
> > everything :(
>
> We stil always have the common structure first. And at least for
> cgroups supports that's what matters.
>
> Re the actual structures - we'll really need to make sure we
>
> a) expose proper userspace abi headers in the kernel for all code
> in the RDMA subsystem
> b) actually use that in the userspace components
>
> I've posted some initial work toward a) a while ago, and once we
> agree on adopting your common repo I'd really like to start through
> with that work. I think it's a pre-requisite for any major new
> userspace ABI work.
I started to work on it over weekend and it is worth do not do same work twice.
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