[RFC net-next 0/6] page_pool: recycle buffers

Matteo Croce
2021-03-11T19:44:19Z

This series enables recycling of the buffers allocated with the page_pool API.
The first two patches are just prerequisite to save space in a struct and
avoid recycling pages allocated with other API.
Patch 2 was based on a previous idea from Jonathan Lemon.

The third one is the real recycling, 4 fixes the compilation of __skb_frag_unref
users, and 5,6 enable the recycling on two drivers.

In the last two patches I reported the improvement I have with the series.

The recycling as is can't be used with drivers like mlx5 which do page split,
but this is documented in a comment.
In the future, a refcount can be used so to support mlx5 with no changes.

Ilias Apalodimas (2):
page_pool: DMA handling and frame recycling via SKBs
net: change users of __skb_frag_unref() and add an extra argument

Jesper Dangaard Brouer (1):
xdp: reduce size of struct xdp_mem_info

Matteo Croce (3):
mm: add a signature in struct page
mvpp2: recycle buffers
mvneta: recycle buffers

.../chelsio/inline_crypto/ch_ktls/chcr_ktls.c | 2 +-
drivers/net/ethernet/marvell/mvneta.c | 4 +-
.../net/ethernet/marvell/mvpp2/mvpp2_main.c | 17 +++----
drivers/net/ethernet/marvell/sky2.c | 2 +-
drivers/net/ethernet/mellanox/mlx4/en_rx.c | 2 +-
include/linux/mm_types.h | 1 +
include/linux/skbuff.h | 33 +++++++++++--
include/net/page_pool.h | 15 ++++++
include/net/xdp.h | 5 +-
net/core/page_pool.c | 47 +++++++++++++++++++
net/core/skbuff.c | 20 +++++++-
net/core/xdp.c | 14 ++++--
net/tls/tls_device.c | 2 +-
13 files changed, 138 insertions(+), 26 deletions(-)

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2.29.2