On 2018年03月10日 04:55, Jesper Dangaard Brouer wrote:
This patchset works towards supporting different XDP RX-ring memory
allocators. As this will be needed by the AF_XDP zero-copy mode.
The patchset uses mlx5 as the sample driver, which gets implemented
XDP_REDIRECT RX-mode, but not ndo_xdp_xmit (as this API is subject to
change thought the patchset).
A new struct xdp_frame is introduced (modeled after cpumap xdp_pkt).
And both ndo_xdp_xmit and the new xdp_return_frame end-up using this.
Support for a driver supplied allocator is implemented, and a
refurbished version of page_pool is the first return allocator type
introduced. This will be a integration point for AF_XDP zero-copy.
The mlx5 driver evolve into using the page_pool, and see a performance
increase (with ndo_xdp_xmit out ixgbe driver) from 6Mpps to 12Mpps.
The patchset stop at the 15 patches limit, but more API changes are
planned. Specifically extending ndo_xdp_xmit and xdp_return_frame
APIs to support bulking. As this will address some known limits.
V2: Updated according to Tariq's feedback
V3: Feedback from Jason Wang and Alex Duyck
Hi Jesper:
Looks like the series forget to register memory model for tun and
virtio-net.
Thanks
