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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-06-16 08:52:13 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-16 22:55:39 +0400 |
| commit | 317fe0e6c5dc9448bcef41a2e31fecfd3dba7f55 (patch) | |
| tree | c2a042e1c8bb96b7fdeadf658309ead1b6e8dabc /net/ipv4/inetpeer.c | |
| parent | fdb93f8ac39aa5902f3d264edd50dffcabfdd13b (diff) | |
| download | linux-317fe0e6c5dc9448bcef41a2e31fecfd3dba7f55.tar.xz | |
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>
Diffstat (limited to 'net/ipv4/inetpeer.c')
| -rw-r--r-- | net/ipv4/inetpeer.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c index 349249fad2db..9ffa24b9a804 100644 --- a/net/ipv4/inetpeer.c +++ b/net/ipv4/inetpeer.c @@ -64,7 +64,7 @@ * usually under some other lock to prevent node disappearing * dtime: unused node list lock * v4daddr: unchangeable - * ip_id_count: idlock + * ip_id_count: atomic value (no lock needed) */ static struct kmem_cache *peer_cachep __read_mostly; @@ -129,7 +129,7 @@ void __init inet_initpeers(void) peer_cachep = kmem_cache_create("inet_peer_cache", sizeof(struct inet_peer), - 0, SLAB_PANIC, + 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL); /* All the timers, started at system startup tend |