Introduce multi-buffer support for xdp running in generic mode not always
linearizing the skb in netif_receive_generic_xdp routine.
Introduce generic percpu page_pools allocator.
Changes since v7:
- fix sparse warnings
Changes since v6:
- remove patch 4/5 'net: page_pool: make stats available just for global pools'
- rename netif_skb_segment_for_xdp() in
skb_cow_data_for_xdp()/skb_pp_cow_data()
- rename net_page_pool_alloc() in net_page_pool_create()
- rename page_pool percpu pointer in system_page_pool
- set percpu page_pool memory size
Changes since v5:
- move percpu page_pool pointer out of softnet_data in a dedicated variable
- make page_pool stats available just for global pools
- rely on netif_skb_segment_for_xdp utility routine in veth driver
Changes since v4:
- fix compilation error if page_pools are not enabled
Changes since v3:
- introduce page_pool in softnet_data structure
- rely on page_pools for xdp_generic code
Changes since v2:
- rely on napi_alloc_frag() and napi_build_skb() to build the new skb
Changes since v1:
- explicitly keep the skb segmented in netif_skb_check_for_generic_xdp() and
do not rely on pskb_expand_head()
Lorenzo Bianconi (4):
net: add generic percpu page_pool allocator
xdp: rely on skb pointer reference in do_xdp_generic and
netif_receive_generic_xdp
xdp: add multi-buff support for xdp running in generic mode
veth: rely on skb_cow_data_for_xdp utility routine
drivers/net/tun.c | 4 +-
drivers/net/veth.c | 79 ++------------------
include/linux/netdevice.h | 2 +-
include/linux/skbuff.h | 2 +
include/net/page_pool/types.h | 3 +
net/core/dev.c | 131 +++++++++++++++++++++++++++-------
net/core/page_pool.c | 23 ++++--
net/core/skbuff.c | 96 ++++++++++++++++++++++++-
8 files changed, 231 insertions(+), 109 deletions(-)
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2.43.0
