aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/backport-5.4/080-wireguard-0120-wireguard-peer-put-frequently-used-members-above-cac.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/generic/backport-5.4/080-wireguard-0120-wireguard-peer-put-frequently-used-members-above-cac.patch')
-rw-r--r--target/linux/generic/backport-5.4/080-wireguard-0120-wireguard-peer-put-frequently-used-members-above-cac.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0120-wireguard-peer-put-frequently-used-members-above-cac.patch b/target/linux/generic/backport-5.4/080-wireguard-0120-wireguard-peer-put-frequently-used-members-above-cac.patch
new file mode 100644
index 0000000000..69e76b96e3
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0120-wireguard-peer-put-frequently-used-members-above-cac.patch
@@ -0,0 +1,42 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: "Jason A. Donenfeld" <Jason@zx2c4.com>
+Date: Mon, 22 Feb 2021 17:25:46 +0100
+Subject: [PATCH] wireguard: peer: put frequently used members above cache
+ lines
+
+commit 5a0598695634a6bb4126818902dd9140cd9df8b6 upstream.
+
+The is_dead boolean is checked for every single packet, while the
+internal_id member is used basically only for pr_debug messages. So it
+makes sense to hoist up is_dead into some space formerly unused by a
+struct hole, while demoting internal_api to below the lowest struct
+cache line.
+
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ drivers/net/wireguard/peer.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/net/wireguard/peer.h
++++ b/drivers/net/wireguard/peer.h
+@@ -39,6 +39,7 @@ struct wg_peer {
+ struct crypt_queue tx_queue, rx_queue;
+ struct sk_buff_head staged_packet_queue;
+ int serial_work_cpu;
++ bool is_dead;
+ struct noise_keypairs keypairs;
+ struct endpoint endpoint;
+ struct dst_cache endpoint_cache;
+@@ -61,9 +62,8 @@ struct wg_peer {
+ struct rcu_head rcu;
+ struct list_head peer_list;
+ struct list_head allowedips_list;
+- u64 internal_id;
+ struct napi_struct napi;
+- bool is_dead;
++ u64 internal_id;
+ };
+
+ struct wg_peer *wg_peer_create(struct wg_device *wg,