Re: [PATCH net-next v3 3/4] selftests/net: ncdevmem: add -b option to set rx-buf-size on bind

[Stanislav Fomichev]

On 06/12, Bobby Eshleman wrote:
> From: Bobby Eshleman <bobbyeshleman@xxxxxxxx>
> 
> Add -b <bytes> to request a non-default niov size via
> NETDEV_A_DMABUF_RX_BUF_SIZE. When the value exceeds PAGE_SIZE,
> udmabuf_alloc() switches to an MFD_HUGETLB-backed memfd so each 2 MB
> hugepage produces one naturally-aligned sg entry.
> 
> Reject values > 2 MB up front: MFD_HUGETLB + udmabuf can only guarantee
> 2 MB per sg entry (one hugepage), so a larger rx_buf_size would fail the
> per-sg length/alignment check.
> 
> Add CONFIG_HUGETLBFS=y to drivers/net/hw/config so the new path is
> reachable in the CI kernels built for these tests.
> 
> Signed-off-by: Bobby Eshleman <bobbyeshleman@xxxxxxxx>

Acked-by: Stanislav Fomichev <sdf@xxxxxxxxxxx>