tree c2a042e1c8bb96b7fdeadf658309ead1b6e8dabc
parent fdb93f8ac39aa5902f3d264edd50dffcabfdd13b
author Eric Dumazet <eric.dumazet@gmail.com> 1276663933 +0000
committer David S. Miller <davem@davemloft.net> 1276714539 -0700

inetpeer: restore small inet_peer structures

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: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>