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authorEric Dumazet <eric.dumazet@gmail.com>2010-06-16 08:52:13 +0400
committerDavid S. Miller <davem@davemloft.net>2010-06-16 22:55:39 +0400
commit317fe0e6c5dc9448bcef41a2e31fecfd3dba7f55 (patch)
treec2a042e1c8bb96b7fdeadf658309ead1b6e8dabc /net/ipv4/inetpeer.c
parentfdb93f8ac39aa5902f3d264edd50dffcabfdd13b (diff)
downloadlinux-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.c4
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