• Eric Dumazet's avatar
    gro: __napi_gro_receive() optimizations · 40d0802b
    Eric Dumazet authored
    compare_ether_header() can have a special implementation on 64 bit
    arches if CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is defined.
    
    __napi_gro_receive() and vlan_gro_common() can avoid a conditional
    branch to perform device match.
    
    On x86_64, __napi_gro_receive() has now 38 instructions instead of 53
    
    As gcc-4.4.3 still choose to not inline it, add inline keyword to this
    performance critical function.
    Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
    CC: Herbert Xu <herbert@gondor.apana.org.au>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    40d0802b
dev.c 148 KB