diff options
| author | Florian Westphal <fw@strlen.de> | 2016-11-22 14:44:19 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-12-06 21:42:19 +0100 |
| commit | ae0ac0ed6fcf5af3be0f63eb935f483f44a402d2 (patch) | |
| tree | bdc9adb5d4744f958630b4e56defc818c905dbe3 /net/ipv4/netfilter/ip_tables.c | |
| parent | f28e15bacedd444608e25421c72eb2cf4527c9ca (diff) | |
| download | linux-ae0ac0ed6fcf5af3be0f63eb935f483f44a402d2.tar.gz | |
netfilter: x_tables: pack percpu counter allocations
instead of allocating each xt_counter individually, allocate 4k chunks
and then use these for counter allocation requests.
This should speed up rule evaluation by increasing data locality,
also speeds up ruleset loading because we reduce calls to the percpu
allocator.
As Eric points out we can't use PAGE_SIZE, page_allocator would fail on
arches with 64k page size.
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/ipv4/netfilter/ip_tables.c')
| -rw-r--r-- | net/ipv4/netfilter/ip_tables.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c index a48430d3420f24..308b456723f0d9 100644 --- a/net/ipv4/netfilter/ip_tables.c +++ b/net/ipv4/netfilter/ip_tables.c @@ -531,7 +531,8 @@ static int check_target(struct ipt_entry *e, struct net *net, const char *name) static int find_check_entry(struct ipt_entry *e, struct net *net, const char *name, - unsigned int size) + unsigned int size, + struct xt_percpu_counter_alloc_state *alloc_state) { struct xt_entry_target *t; struct xt_target *target; @@ -540,7 +541,7 @@ find_check_entry(struct ipt_entry *e, struct net *net, const char *name, struct xt_mtchk_param mtpar; struct xt_entry_match *ematch; - if (!xt_percpu_counter_alloc(&e->counters)) + if (!xt_percpu_counter_alloc(alloc_state, &e->counters)) return -ENOMEM; j = 0; @@ -676,6 +677,7 @@ static int translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0, const struct ipt_replace *repl) { + struct xt_percpu_counter_alloc_state alloc_state = { 0 }; struct ipt_entry *iter; unsigned int *offsets; unsigned int i; @@ -735,7 +737,8 @@ translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0, /* Finally, each sanity check must pass */ i = 0; xt_entry_foreach(iter, entry0, newinfo->size) { - ret = find_check_entry(iter, net, repl->name, repl->size); + ret = find_check_entry(iter, net, repl->name, repl->size, + &alloc_state); if (ret != 0) break; ++i; |