Re: [RFC PATCH] misc: fgds: enable GPU-NVMe direct I/O via POSIX and io_uring

[Li Wang]

Hi Greg,
  Thanks for the review!

> 
> That's not really needed in a changelog text, it could be in the 0/X
> patch :)
> 
Sorry for the clutter. I will move most of them into the 0/X patch in v2.

> Anyway, you didn't cc: the io_uring list, why?
> 
`scripts/get_maintainer.pl` didn't output the io_uring mailing list, likely 
because this patch doesn't directly touch the io_uring codebase itself. It only 
enables remapping GPU memory buffers to CPU virtual addresses, which can then be 
consumed via standard io_uring APIs.

I've added io-uring@xxxxxxxxxxxxxxx to CC for this reply and will keep it in v2.

> 
> Nor why "fgds" is the name, that's going to be hard to remember, does it
> stand for something?
> 
"FGDS" stands for Fast GPUDirect Storage. GPUDirect Storage (GDS) is NVIDIA's 
technology enabling direct I/O between GPU memory and files on NVMe, 
widely used in LLM workloads to bypass CPU overhead.

If "FGDS" feels unintuitive, please let us know if you have a better alternative.

We will address the rest of the code comments in the v2 patch series soon.

Thanks,
Li Wang