Re: [PATCH] RDMA/mlx5: return the EFAULT per ibv_advise_mr(3)

Jason Gunthorpe
2021-08-03T16:25:16Z

On Sun, Aug 01, 2021 at 05:20:50PM +0800, Li Zhijian wrote:
> ibv_advise_mr(3) says:
> EFAULT In one of the following: o When the range requested is out of the MR bounds,
> or when parts of it are not part of the process address space. o One of the
> lkeys provided in the scatter gather list is invalid or with wrong write access
>
> Actually get_prefetchable_mr() will return NULL if it see above conditions

No, get_prefetchable_mr() returns NULL if the mkey is invalid

The above is talking about the address, which is checked inside
pagefault_mr() and does return EFAULT for all the cases I can see?

Jason