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    inetpeer: restore small inet_peer structures · 317fe0e6
    Eric Dumazet 提交于
    Addition of rcu_head to struct inet_peer added 16bytes on 64bit arches.
    
    Thats a bit unfortunate, since old size was exactly 64 bytes.
    
    This can be solved, using an union between this rcu_head an four fields,
    that are normally used only when a refcount is taken on inet_peer.
    rcu_head is used only when refcnt=-1, right before structure freeing.
    
    Add a inet_peer_refcheck() function to check this assertion for a while.
    
    We can bring back SLAB_HWCACHE_ALIGN qualifier in kmem cache creation.
    Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
    Signed-off-by: NDavid S. Miller <davem@davemloft.net>
    317fe0e6
inetpeer.c 15.2 KB