net: move napi_hash[] into read mostly section
We do not often add/delete a napi context.
Moving napi_hash[] into read mostly section avoids potential false sharing.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index ff58a8b..02dfbd9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -184,7 +184,7 @@
static DEFINE_SPINLOCK(napi_hash_lock);
static unsigned int napi_gen_id = NR_CPUS;
-static DEFINE_HASHTABLE(napi_hash, 8);
+static DEFINE_READ_MOSTLY_HASHTABLE(napi_hash, 8);
static seqcount_t devnet_rename_seq;