Make XDP helpers compatible with unreadable memory. This is very similar to how we handle pfmemalloc frags today. Record the info in xdp_buf flags as frags get added and then update the skb once allocated. This series adds the unreadable memory metadata tracking to drivers using xdp_build_skb_from*() with no changes on the driver side - hence the only driver changes here are refactoring. Obviously, unreadable memory is incompatible with XDP today, but thanks to xdp_build_skb_from_buf() increasing number of drivers have a unified datapath, whether XDP is enabled or not. RFC: https://lore.kernel.org/20250812161528.835855-1-kuba@xxxxxxxxxx Jakub Kicinski (2): net: xdp: pass full flags to xdp_update_skb_shared_info() net: xdp: handle frags with unreadable memory include/net/xdp.h | 38 ++++++++++++------- drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 7 ++-- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 15 ++++---- drivers/net/ethernet/intel/ice/ice_txrx.c | 15 ++++---- drivers/net/ethernet/marvell/mvneta.c | 7 ++-- .../net/ethernet/mellanox/mlx5/core/en_rx.c | 23 ++++++----- drivers/net/virtio_net.c | 7 ++-- net/core/xdp.c | 21 +++++----- 8 files changed, 69 insertions(+), 64 deletions(-) -- 2.51.0
