diff mbox series

[net,4/7] wireguard: peer: put frequently used members above cache lines

Message ID 20210222162549.3252778-5-Jason@zx2c4.com (mailing list archive)
State Accepted
Delegated to: Netdev Maintainers
Headers show
Series wireguard fixes for 5.12-rc1 | expand

Checks

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netdev/cover_letter success Link
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netdev/tree_selection success Clearly marked for net
netdev/subject_prefix success Link
netdev/cc_maintainers warning 2 maintainers not CCed: wireguard@lists.zx2c4.com kuba@kernel.org
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 17 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Jason A. Donenfeld Feb. 22, 2021, 4:25 p.m. UTC
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.

Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 drivers/net/wireguard/peer.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireguard/peer.h b/drivers/net/wireguard/peer.h
index 23af40922997..aaff8de6e34b 100644
--- 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,