Re: [PATCH resend for-next 0/5] RTRS enable write path fast memory regitration

[Jason Gunthorpe <jgg@nvidia.com>]

On Mon, Jun 21, 2021 at 07:53:35AM +0200, Jack Wang wrote:
> Hi Jason, hi Doug, hi Jens
> 
> Please consider to include following changes to the next merge window.
> 
> This enables fast memory registration for write IO patch, so rtrs can
> support bigger IO than 116k without splitting. With this in place, both
> read/write request are more symmetric, and we can also reduce the memory
> usage.
> 
> The patchset is orgnized as:
> - patch1 preparation.
> - patch2 implement fast memory registration for write patch.
> - patch3 reduce memory usage.
> - patch4 raise MAX_SGEMENTs
> - patch5 rnbd-clt to query and use the max_sgements setting.
> 
> As the main change is in RTRS, so it's easier to go through RDMA tree, hence
> send this patchset to linux-rdma.
> 
> This is a rebased on the top latest rdma/wip/jgg-for-next commit
> 7e78dd816e45 ("RDMA/hns: Clear extended doorbell info before using")
> 
> v1: https://lore.kernel.org/linux-rdma/20210608113536.42965-1-jinpu.wang@ionos.com/T/#t
> 
> Thanks!
> 
> Jack Wang (5):
>   RDMA/rtrs: Introduce head/tail wr
>   RDMA/rtrs-clt: Write path fast memory registration
>   RDMA/rtrs_clt: Alloc less memory with write path fast memory
>     registration
>   RDMA/rtrs-clt: Raise MAX_SEGMENTS
>   rnbd/rtrs-clt: Query and use max_segments from rtrs-clt.

Applied to for-next, thanks

Jason