fib_rules: reorder struct fib_rules fields

Move refcnt, pref, suppress_ifgroup, suppress_prefixlen out of first
cache line, as they are not used in fast path.

Make sure ctarget & fr_net are in first cache line.

(Assuming 64 bit arches and 64 bytes cache lines)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 5 deletions

diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 9d0fcbaa9cbb..4b2b557fb0e8 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -10,23 +10,25 @@
 
 struct fib_rule {
         struct list_head        list;
-        atomic_t                refcnt;
         int                     iifindex;
         int                     oifindex;
         u32                     mark;
         u32                     mark_mask;
-        u32                     pref;
         u32                     flags;
         u32                     table;
-        int                     suppress_ifgroup;
-        int                     suppress_prefixlen;
         u8                      action;
+        /* 3 bytes hole, try to use */
         u32                     target;
         struct fib_rule __rcu   *ctarget;
+        struct net              *fr_net;
+
+        atomic_t                refcnt;
+        u32                     pref;
+        int                     suppress_ifgroup;
+        int                     suppress_prefixlen;
         char                    iifname[IFNAMSIZ];
         char                    oifname[IFNAMSIZ];
         struct rcu_head         rcu;
-        struct net *            fr_net;
 };
 
 struct fib_lookup_arg {