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net: move ptype_all into net_hotdata

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ptype_all is used in rx/tx fast paths.

Move it to net_hotdata for better cache locality.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240306160031.874438-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2024-03-06 16:00:17 +00:00 committed by Jakub Kicinski
parent f59b5416c3
commit 0b91fa4bfb
5 changed files with 13 additions and 13 deletions
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1
include/linux/netdevice.h
View File

@ -5306,7 +5306,6 @@ static inline const char *netdev_reg_state(const struct net_device *dev)
#define PTYPE_HASH_SIZE (16)
#define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
extern struct list_head ptype_all __read_mostly;
extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
extern struct net_device *blackhole_netdev;

1
include/net/hotdata.h
View File

@ -7,6 +7,7 @@
/* Read mostly data used in network fast paths. */
struct net_hotdata {
struct list_head offload_base;
struct list_head ptype_all;
int gro_normal_batch;
int netdev_budget;
int netdev_budget_usecs;

16
net/core/dev.c
View File

@ -161,7 +161,6 @@
static DEFINE_SPINLOCK(ptype_lock);
struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
struct list_head ptype_all __read_mostly; /* Taps */
static int netif_rx_internal(struct sk_buff *skb);
static int call_netdevice_notifiers_extack(unsigned long val,
@ -540,7 +539,7 @@ static inline void netdev_set_addr_lockdep_class(struct net_device *dev)
static inline struct list_head *ptype_head(const struct packet_type *pt)
{
if (pt->type == htons(ETH_P_ALL))
return pt->dev ? &pt->dev->ptype_all : &ptype_all;
return pt->dev ? &pt->dev->ptype_all : &net_hotdata.ptype_all;
else
return pt->dev ? &pt->dev->ptype_specific :
&ptype_base[ntohs(pt->type) & PTYPE_HASH_MASK];
@ -2226,7 +2225,8 @@ static inline bool skb_loop_sk(struct packet_type *ptype, struct sk_buff *skb)
*/
bool dev_nit_active(struct net_device *dev)
{
return !list_empty(&ptype_all) || !list_empty(&dev->ptype_all);
return !list_empty(&net_hotdata.ptype_all) ||
!list_empty(&dev->ptype_all);
}
EXPORT_SYMBOL_GPL(dev_nit_active);
@ -2237,10 +2237,9 @@ EXPORT_SYMBOL_GPL(dev_nit_active);
void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
{
struct packet_type *ptype;
struct list_head *ptype_list = &net_hotdata.ptype_all;
struct packet_type *ptype, *pt_prev = NULL;
struct sk_buff *skb2 = NULL;
struct packet_type *pt_prev = NULL;
struct list_head *ptype_list = &ptype_all;
rcu_read_lock();
again:
@ -2286,7 +2285,7 @@ again:
pt_prev = ptype;
}
if (ptype_list == &ptype_all) {
if (ptype_list == &net_hotdata.ptype_all) {
ptype_list = &dev->ptype_all;
goto again;
}
@ -5387,7 +5386,7 @@ another_round:
if (pfmemalloc)
goto skip_taps;
list_for_each_entry_rcu(ptype, &ptype_all, list) {
list_for_each_entry_rcu(ptype, &net_hotdata.ptype_all, list) {
if (pt_prev)
ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = ptype;
@ -11749,7 +11748,6 @@ static int __init net_dev_init(void)
if (netdev_kobject_init())
goto out;
INIT_LIST_HEAD(&ptype_all);
for (i = 0; i < PTYPE_HASH_SIZE; i++)
INIT_LIST_HEAD(&ptype_base[i]);

1
net/core/hotdata.c
View File

@ -7,6 +7,7 @@
struct net_hotdata net_hotdata __cacheline_aligned = {
.offload_base = LIST_HEAD_INIT(net_hotdata.offload_base),
.ptype_all = LIST_HEAD_INIT(net_hotdata.ptype_all),
.gro_normal_batch = 8,
.netdev_budget = 300,

7
net/core/net-procfs.c
View File

@ -3,6 +3,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/wext.h>
#include <net/hotdata.h>
#include "dev.h"
@ -183,7 +184,7 @@ static void *ptype_get_idx(struct seq_file *seq, loff_t pos)
}
}
list_for_each_entry_rcu(pt, &ptype_all, list) {
list_for_each_entry_rcu(pt, &net_hotdata.ptype_all, list) {
if (i == pos)
return pt;
++i;
@ -231,13 +232,13 @@ static void *ptype_seq_next(struct seq_file *seq, void *v, loff_t *pos)
}
}
nxt = ptype_all.next;
nxt = net_hotdata.ptype_all.next;
goto ptype_all;
}
if (pt->type == htons(ETH_P_ALL)) {
ptype_all:
if (nxt != &ptype_all)
if (nxt != &net_hotdata.ptype_all)
goto found;
hash = 0;
nxt = ptype_base[0].next;