Subject: [PATCH,resent] reduce sizeof(struct inet_peer) from 128 to 64 bytes on 64bits architectures

From: Eric Dumazet <[email-masked]>
Date: Thu, 17 Mar 2005 00:38:48 +0100

Resent with diff file not tab/space mangled :(

As peer_cachep uses kmem_cache_create("inet_peer_cache", ... SLAB_HWCACHE_ALIGN ...),
better try to use exactly 64 bytes instead of 72 for struct inet_peer.

This also means that this structure fits in one cache line on x86_64.

Thank you
Eric Dumazet

diff -Nru linux-2.6.11/include/net/inetpeer.h linux-2.6.11-ed/include/net/inetpeer.h
--- linux-2.6.11/include/net/inetpeer.h	2005-03-02 08:37:48.000000000 +0100
+++ linux-2.6.11-ed/include/net/inetpeer.h	2005-03-16 18:52:49.000000000 +0100
@@ -19,9 +19,9 @@
 {
 	struct inet_peer	*avl_left, *avl_right;
 	struct inet_peer	*unused_next, **unused_prevp;
-	atomic_t		refcnt;
 	unsigned long		dtime;		/* the time of last use of not
 						 * referenced entries */
+	atomic_t		refcnt;
 	__u32			v4daddr;	/* peer's address */
 	__u16			avl_height;
 	__u16			ip_id_count;	/* IP ID for the next packet */