• Daniel Borkmann's avatar
    packet: reorder a member in packet_ring_buffer · 0578edc5
    Daniel Borkmann authored
    There's a 4 byte hole in packet_ring_buffer structure before
    prb_bdqc, that can be filled with 'pending' member, thus we can
    reduce the overall structure size from 224 bytes to 216 bytes.
    This also has the side-effect, that in struct packet_sock 2*4 byte
    holes after the embedded packet_ring_buffer members are removed,
    and overall, packet_sock can be reduced by 1 cacheline:
    Before: size: 1344, cachelines: 21, members: 24
    After:  size: 1280, cachelines: 20, members: 24
    Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
internal.h 2.7 KB