• Arnaldo Carvalho de Melo's avatar
    [SK_BUFF]: Convert skb->tail to sk_buff_data_t · 27a884dc
    Arnaldo Carvalho de Melo authored
    So that it is also an offset from skb->head, reduces its size from 8 to 4 bytes
    on 64bit architectures, allowing us to combine the 4 bytes hole left by the
    layer headers conversion, reducing struct sk_buff size to 256 bytes, i.e. 4
    64byte cachelines, and since the sk_buff slab cache is SLAB_HWCACHE_ALIGN...
    Many calculations that previously required that skb->{transport,network,
    mac}_header be first converted to a pointer now can be done directly, being
    meaningful as offsets or pointers.
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>