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    Subject[PATCH net-next 0/2] net: core: use listified Rx for GRO_NORMAL in napi_gro_receive()
    Date
    Hi Dave,

    This series was written as a continuation to commit 323ebb61e32b
    ("net: use listified RX for handling GRO_NORMAL skbs"), and also takes
    an advantage of listified Rx for GRO. This time, however, we're
    targeting at a way more common and used function, napi_gro_receive().

    There are about ~100 call sites of this function, including gro_cells
    and mac80211, so even wireless systems will benefit from it.
    The only driver that cares about the return value is
    ethernet/socionext/netsec, and only for updating statistics. I don't
    believe that this change can break its functionality, but anyway,
    we have plenty of time till next merge window to pay this change
    a proper attention.

    Besides having this functionality implemented for napi_gro_frags()
    users, the main reason is the solid performance boost that has been
    shown during tests on 1-core MIPS board (with not yet mainlined
    driver):

    * no batching (5.4-rc2): ~450/450 Mbit/s
    * with gro_normal_batch == 8: ~480/480 Mbit/s
    * with gro_normal_batch == 16: ~500/500 Mbit/s

    Applies on top of net-next.
    Thanks.

    Alexander Lobakin (2):
    net: core: use listified Rx for GRO_NORMAL in napi_gro_receive()
    net: core: increase the default size of GRO_NORMAL skb lists to flush

    net/core/dev.c | 51 +++++++++++++++++++++++++-------------------------
    1 file changed, 26 insertions(+), 25 deletions(-)

    --
    2.23.0

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