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Message-ID: <20240227150200.2814664-2-edumazet@google.com>
Date: Tue, 27 Feb 2024 15:01:46 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: David Ahern <dsahern@...nel.org>, Jiri Pirko <jiri@...dia.com>, netdev@...r.kernel.org,
eric.dumazet@...il.com, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH v2 net-next 01/15] ipv6: add ipv6_devconf_read_txrx cacheline_group
IPv6 TX and RX fast path use the following fields:
- disable_ipv6
- hop_limit
- mtu6
- forwarding
- disable_policy
- proxy_ndp
Place them in a group to increase data locality.
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
include/linux/ipv6.h | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index ef3aa060a289ea4eecf4d6e8c1dc614101f37c3f..383a0ea2ab9131e685822e5df506582802642e84 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -3,6 +3,7 @@
#define _IPV6_H
#include <uapi/linux/ipv6.h>
+#include <linux/cache.h>
#define ipv6_optlen(p) (((p)->hdrlen+1) << 3)
#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
@@ -10,9 +11,16 @@
* This structure contains configuration options per IPv6 link.
*/
struct ipv6_devconf {
- __s32 forwarding;
+ /* RX & TX fastpath fields. */
+ __cacheline_group_begin(ipv6_devconf_read_txrx);
+ __s32 disable_ipv6;
__s32 hop_limit;
__s32 mtu6;
+ __s32 forwarding;
+ __s32 disable_policy;
+ __s32 proxy_ndp;
+ __cacheline_group_end(ipv6_devconf_read_txrx);
+
__s32 accept_ra;
__s32 accept_redirects;
__s32 autoconf;
@@ -45,7 +53,6 @@ struct ipv6_devconf {
__s32 accept_ra_rt_info_max_plen;
#endif
#endif
- __s32 proxy_ndp;
__s32 accept_source_route;
__s32 accept_ra_from_local;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
@@ -55,7 +62,6 @@ struct ipv6_devconf {
#ifdef CONFIG_IPV6_MROUTE
atomic_t mc_forwarding;
#endif
- __s32 disable_ipv6;
__s32 drop_unicast_in_l2_multicast;
__s32 accept_dad;
__s32 force_tllao;
@@ -76,7 +82,6 @@ struct ipv6_devconf {
#endif
__u32 enhanced_dad;
__u32 addr_gen_mode;
- __s32 disable_policy;
__s32 ndisc_tclass;
__s32 rpl_seg_enabled;
__u32 ioam6_id;
--
2.44.0.rc1.240.g4c46232300-goog
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