skbuff: Move rxhash and vlan_tci to consolidate holes in sk_buff

This change helps to reduce the overall size of the sk_buff by moving
rxhash and vlan_tci so that the u16 values and u8 bitfields can be better
combined to create only one hole instead of multiple.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 50db9b0..2b7317f 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -438,6 +438,11 @@ struct sk_buff {
 #endif
 
        int                     skb_iif;
+
+       __u32                   rxhash;
+
+       __u16                   vlan_tci;
+
 #ifdef CONFIG_NET_SCHED
        __u16                   tc_index;       /* traffic control index */
 #ifdef CONFIG_NET_CLS_ACT
@@ -445,8 +450,6 @@ struct sk_buff {
 #endif
 #endif
 
-       __u32                   rxhash;
-
        __u16                   queue_mapping;
        kmemcheck_bitfield_begin(flags2);
 #ifdef CONFIG_IPV6_NDISC_NODETYPE
@@ -470,8 +473,6 @@ struct sk_buff {
                __u32           dropcount;
        };
 
-       __u16                   vlan_tci;
-
        sk_buff_data_t          transport_header;
        sk_buff_data_t          network_header;
        sk_buff_data_t          mac_header;