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    Subject[PATCH net-next v4 0/3] some optimization for page pool
    Date
    Patch 1: disable dma mapping support for 32-bit arch with 64-bit
    DMA.
    Patch 2 & 3: pp page frag tracking support

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

    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 (3):
    page_pool: disable dma mapping support for 32-bit arch with 64-bit DMA
    page_pool: change BIAS_MAX to support incrementing
    skbuff: keep track of pp page when pp_frag_count is used

    include/linux/mm_types.h | 13 +------------
    include/linux/skbuff.h | 30 ++++++++++++++++++++----------
    include/net/page_pool.h | 36 ++++++++++++++++++++++++------------
    net/core/page_pool.c | 29 +++++++++--------------------
    net/core/skbuff.c | 10 ++++++++--
    5 files changed, 62 insertions(+), 56 deletions(-)

    --
    2.33.0

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