• Eric Dumazet's avatar
    net: remove skb recycling · acb600de
    Eric Dumazet authored
    Over time, skb recycling infrastructure got litle interest and
    many bugs. Generic rx path skb allocation is now using page
    fragments for efficient GRO / TCP coalescing, and recyling
    a tx skb for rx path is not worth the pain.
    
    Last identified bug is that fat skbs can be recycled
    and it can endup using high order pages after few iterations.
    
    With help from Maxime Bizon, who pointed out that commit
    87151b86 (net: allow pskb_expand_head() to get maximum tailroom)
    introduced this regression for recycled skbs.
    
    Instead of fixing this bug, lets remove skb recycling.
    
    Drivers wanting really hot skbs should use build_skb() anyway,
    to allocate/populate sk_buff right before netif_receive_skb()
    Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
    Cc: Maxime Bizon <mbizon@freebox.fr>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    acb600de
gianfar.h 39.2 KB