RE: [PATCH rdma-core 3/5] pyverbs: Add dma-buf based MR support

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> -----Original Message-----
> From: Jason Gunthorpe <jgg@xxxxxxxx>
> Sent: Tuesday, November 24, 2020 7:36 AM
> To: Daniel Vetter <daniel@xxxxxxxx>
> Cc: Xiong, Jianxin <jianxin.xiong@xxxxxxxxx>; Leon Romanovsky <leon@xxxxxxxxxx>; linux-rdma@xxxxxxxxxxxxxxx; dri-
> devel@xxxxxxxxxxxxxxxxxxxxx; Doug Ledford <dledford@xxxxxxxxxx>; Vetter, Daniel <daniel.vetter@xxxxxxxxx>; Christian Koenig
> <christian.koenig@xxxxxxx>
> Subject: Re: [PATCH rdma-core 3/5] pyverbs: Add dma-buf based MR support
> 
> On Tue, Nov 24, 2020 at 04:16:58PM +0100, Daniel Vetter wrote:
> 
> > Compute is the worst, because opencl is widely considered a mistake
> > (maybe opencl 3 is better, but nvidia is stuck on 1.2). The actually
> > used stuff is cuda (nvidia-only), rocm (amd-only) and now with intel
> > also playing we have xe (intel-only).
> 
> > It's pretty glorious :-/
> 
> I enjoyed how the Intel version of CUDA is called "OneAPI" not "Third API" ;)
> 
> Hopefuly xe compute won't leave a lot of half finished abandoned kernel code like Xeon Phi did :(
> 
> > Also I think we discussed this already, but for actual p2p the intel
> > patches aren't in upstream yet. We have some internally, but with very
> > broken locking (in the process of getting fixed up, but it's taking time).
> 
> Someone needs to say this test works on a real system with an unpatched upstream driver.
> 
> I thought AMD had the needed parts merged?

Yes, I have tested these with AMD GPU.

> 
> Jason
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