Re: [dpdk-dev] [PATCH v2 3/3] net/af_xdp: enable support for unaligned umem chunks

[Ye Xiaolong <xiaolong.ye@intel.com>]

On 09/30, Ciara Loftus wrote:
>This patch enables the unaligned chunks feature for AF_XDP which allows
>chunks to be placed at arbitrary places in the umem, as opposed to them
>being required to be aligned to 2k. This allows for DPDK application
>mempools to be mapped directly into the umem and in turn enable zero copy
>transfer between umem and the PMD.
>
>This patch replaces the zero copy via external mbuf mechanism introduced
>in commit e9ff8bb71943 ("net/af_xdp: enable zero copy by external mbuf").
>The pmd_zero copy vdev argument is also removed as now the PMD will
>auto-detect presence of the unaligned chunks feature and enable it if so
>and otherwise fall back to copy mode if not detected.
>
>Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
>Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
>---
> doc/guides/nics/af_xdp.rst             |   2 +-
> doc/guides/rel_notes/release_19_11.rst |   4 +
> drivers/net/af_xdp/rte_eth_af_xdp.c    | 402 ++++++++++++++++++++-----
> 3 files changed, 325 insertions(+), 83 deletions(-)
>

Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>