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authorDavid S. Miller <davem@davemloft.net>2017-09-05 20:03:35 -0700
committerDavid S. Miller <davem@davemloft.net>2017-09-05 20:03:35 -0700
commit18fb0b46d555dc42f52f69428dcd52f133877078 (patch)
tree7696741f50fb1a373aee3601074e30f6e366e425 /include/net
parent39cebdb77d55a193492a42170bf1c3d11e41e740 (diff)
parent6d9c153a0b84392406bc77600aa7d3ea365de041 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'include/net')
-rw-r--r--include/net/inet_frag.h35
-rw-r--r--include/net/route.h7
2 files changed, 13 insertions, 29 deletions
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index 6fdcd2427776..fc59e0775e00 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -1,14 +1,9 @@
#ifndef __NET_FRAG_H__
#define __NET_FRAG_H__
-#include <linux/percpu_counter.h>
-
struct netns_frags {
- /* The percpu_counter "mem" need to be cacheline aligned.
- * mem.count must not share cacheline with other writers
- */
- struct percpu_counter mem ____cacheline_aligned_in_smp;
-
+ /* Keep atomic mem on separate cachelines in structs that include it */
+ atomic_t mem ____cacheline_aligned_in_smp;
/* sysctls */
int timeout;
int high_thresh;
@@ -108,15 +103,10 @@ struct inet_frags {
int inet_frags_init(struct inet_frags *);
void inet_frags_fini(struct inet_frags *);
-static inline int inet_frags_init_net(struct netns_frags *nf)
-{
- return percpu_counter_init(&nf->mem, 0, GFP_KERNEL);
-}
-static inline void inet_frags_uninit_net(struct netns_frags *nf)
+static inline void inet_frags_init_net(struct netns_frags *nf)
{
- percpu_counter_destroy(&nf->mem);
+ atomic_set(&nf->mem, 0);
}
-
void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);
void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
@@ -140,31 +130,24 @@ static inline bool inet_frag_evicting(struct inet_frag_queue *q)
/* Memory Tracking Functions. */
-/* The default percpu_counter batch size is not big enough to scale to
- * fragmentation mem acct sizes.
- * The mem size of a 64K fragment is approx:
- * (44 fragments * 2944 truesize) + frag_queue struct(200) = 129736 bytes
- */
-static unsigned int frag_percpu_counter_batch = 130000;
-
static inline int frag_mem_limit(struct netns_frags *nf)
{
- return percpu_counter_read(&nf->mem);
+ return atomic_read(&nf->mem);
}
static inline void sub_frag_mem_limit(struct netns_frags *nf, int i)
{
- percpu_counter_add_batch(&nf->mem, -i, frag_percpu_counter_batch);
+ atomic_sub(i, &nf->mem);
}
static inline void add_frag_mem_limit(struct netns_frags *nf, int i)
{
- percpu_counter_add_batch(&nf->mem, i, frag_percpu_counter_batch);
+ atomic_add(i, &nf->mem);
}
-static inline unsigned int sum_frag_mem_limit(struct netns_frags *nf)
+static inline int sum_frag_mem_limit(struct netns_frags *nf)
{
- return percpu_counter_sum_positive(&nf->mem);
+ return atomic_read(&nf->mem);
}
/* RFC 3168 support :
diff --git a/include/net/route.h b/include/net/route.h
index cb0a76d9dde1..1b09a9368c68 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -189,10 +189,11 @@ static inline int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src,
rcu_read_lock();
err = ip_route_input_noref(skb, dst, src, tos, devin);
- if (!err)
+ if (!err) {
skb_dst_force_safe(skb);
- if (!skb_dst(skb))
- err = -EINVAL;
+ if (!skb_dst(skb))
+ err = -EINVAL;
+ }
rcu_read_unlock();
return err;