Re: [PATCH] net: fix kmemcheck annotations

From: David Miller <davem@davemloft.net>
Date: 2009-10-29 10:17:24

From: Eric Dumazet <redacted>
Date: Thu, 29 Oct 2009 11:10:37 +0100

@@ -367,7 +367,6 @@ struct sk_buff {
 #endif
 
 	int			iif;
-	__u16			queue_mapping;
 #ifdef CONFIG_NET_SCHED
 	__u16			tc_index;	/* traffic control index */
 #ifdef CONFIG_NET_CLS_ACT
@@ -376,6 +375,7 @@ struct sk_buff {
 #endif
 
 	kmemcheck_bitfield_begin(flags2);
+	__u16			queue_mapping:16;
 #ifdef CONFIG_IPV6_NDISC_NODETYPE
 	__u8			ndisc_nodetype:2;
 #endif

We may be trading size for performance here, I wonder if
it's wise to move queue_mapping like that and what
locality change we get as a result.