[PATCH net-next -v5 0/4] some optimization for page pool

Yunsheng Lin
2021-10-09T09:39:14Z

Patch 1: disable dma mapping support for 32-bit arch with 64-bit
DMA.
Patch 2 - 4: pp page frag tracking support

The small packet drop test show no notiable performance degradation
when page pool is disabled.

V5: Keep the put_page()/get_page() semantics.

V4:
1. Change error code to EOPNOTSUPP in patch 1.
2. Drop patch 2.
3. Use pp_frag_count to indicate if a pp page can be tracked,
to avoid breaking the mlx5 driver.

V3:
1. add patch 1/4/6/7.
2. use pp_magic to identify pp page uniquely too.
3. avoid unnecessary compound_head() calling.

V2: add patch 2, adjust the commit log accroding to the discussion
in V1, and fix a compiler error reported by kernel test robot.

Yunsheng Lin (4):
page_pool: disable dma mapping support for 32-bit arch with 64-bit DMA
page_pool: change BIAS_MAX to support incrementing
mm: introduce __get_page() and __put_page()
skbuff: keep track of pp page when pp_frag_count is used

include/linux/mm.h | 21 ++++++++++++++-------
include/linux/mm_types.h | 13 +------------
include/linux/skbuff.h | 30 ++++++++++++++++++++----------
include/net/page_pool.h | 36 ++++++++++++++++++++++++------------
mm/swap.c | 6 +++---
net/core/page_pool.c | 29 +++++++++--------------------
net/core/skbuff.c | 10 ++++++++--
7 files changed, 79 insertions(+), 66 deletions(-)

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2.33.0