Place the read-mostly parts accessed by the datapath first.
In particular, we do access ->flags member (to see if HW offload
is enabled) for every single packet, but this is placed in the 5th
cacheline.
priority could stay where it is, but move it too to cover a hole.
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
---
include/net/netfilter/nf_flow_table.h | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
index fe1507c1db82..36351e441316 100644
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -72,12 +72,13 @@ enum nf_flowtable_flags {
};
struct nf_flowtable {
- struct list_head list;
- struct rhashtable rhashtable;
- int priority;
+ unsigned int flags; /* readonly in datapath */
+ int priority; /* control path (padding hole) */
+ struct rhashtable rhashtable; /* datapath, read-mostly members come first */
+
+ struct list_head list; /* slowpath parts */
const struct nf_flowtable_type *type;
struct delayed_work gc_work;
- unsigned int flags;
struct flow_block flow_block;
struct rw_semaphore flow_block_lock; /* Guards flow_block */
possible_net_t net;
--
2.41.0
