Re: [PATCH v4 0/6] zcrx huge pages support Vol 1

[David Wei <dw@davidwei.uk>]

On 2025-07-02 07:29, Pavel Begunkov wrote:
> Use sgtable as the common format b/w dmabuf and user pages, deduplicate
> dma address propagation handling, and use it to omptimise dma mappings.
> It also prepares it for larger size for NIC pages.
> 
> v4: further restrict kmap fallback length, v3 isn't be generic
>      enough to cover future uses.
> 
> v3: truncate kmap'ed length by both pages
> 
> v2: Don't coalesce into folios, just use sg_alloc_table_from_pages()
>      for now. Coalescing will return back later.
> 
>      Improve some fallback copy code. Patch 1, and Patch 6 adding a
>      helper to work with larger pages, which also allows to get rid
>      of skb_frag_foreach_page.
> 
>      Return copy fallback helpers back to pages instead of folios,
>      the latter wouldn't be correct in all cases.
> 
> Pavel Begunkov (6):
>    io_uring/zcrx: always pass page to io_zcrx_copy_chunk
>    io_uring/zcrx: return error from io_zcrx_map_area_*
>    io_uring/zcrx: introduce io_populate_area_dma
>    io_uring/zcrx: allocate sgtable for umem areas
>    io_uring/zcrx: assert area type in io_zcrx_iov_page
>    io_uring/zcrx: prepare fallback for larger pages
> 
>   io_uring/zcrx.c | 241 +++++++++++++++++++++++++-----------------------
>   io_uring/zcrx.h |   1 +
>   2 files changed, 128 insertions(+), 114 deletions(-)
> 

What did you use to test this patch series or will that come with vol 2?