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[net-next,1/5] bridge: vlan: adjust rhashtable initial size and hash locks size

Message ID 1443637015-4153-2-git-send-email-razor@blackwall.org
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Nikolay Aleksandrov Sept. 30, 2015, 6:16 p.m. UTC 
From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

As Stephen pointed out the default initial size is more than we need, so
let's start small (4 elements, thus nelem_hint = 3). Also limit the hash
locks to the number of CPUs as we don't need any write-side scaling and
this looks like the minimum.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
---
 net/bridge/br_vlan.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index e227164bc3e1..283d012c3d89 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -19,6 +19,8 @@  static const struct rhashtable_params br_vlan_rht_params = {
 	.head_offset = offsetof(struct net_bridge_vlan, vnode),
 	.key_offset = offsetof(struct net_bridge_vlan, vid),
 	.key_len = sizeof(u16),
+	.nelem_hint = 3,
+	.locks_mul = 1,
 	.max_size = VLAN_N_VID,
 	.obj_cmpfn = br_vlan_cmp,
 	.automatic_shrinking = true,