diff options
| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2013-01-29 03:45:12 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-29 22:36:24 +0400 |
| commit | d433673e5f9180e05a770c4b2ab18c08ad51cc21 (patch) | |
| tree | 7d71bb8483724418e6a4f48cc4099a8722c704c8 /include | |
| parent | 6e34a8b37aca63f109bf990d46131ee07206f5f1 (diff) | |
| download | linux-d433673e5f9180e05a770c4b2ab18c08ad51cc21.tar.xz | |
net: frag helper functions for mem limit tracking
This change is primarily a preparation to ease the extension of memory
limit tracking.
The change does reduce the number atomic operation, during freeing of
a frag queue. This does introduce a some performance improvement, as
these atomic operations are at the core of the performance problems
seen on NUMA systems.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/inet_frag.h | 27 | ||||
| -rw-r--r-- | include/net/ipv6.h | 2 |
2 files changed, 28 insertions, 1 deletions
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h index 8e4c42523f59..f2fabc2a79de 100644 --- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -79,4 +79,31 @@ static inline void inet_frag_put(struct inet_frag_queue *q, struct inet_frags *f inet_frag_destroy(q, f, NULL); } +/* Memory Tracking Functions. */ + +static inline int frag_mem_limit(struct netns_frags *nf) +{ + return atomic_read(&nf->mem); +} + +static inline void sub_frag_mem_limit(struct inet_frag_queue *q, int i) +{ + atomic_sub(i, &q->net->mem); +} + +static inline void add_frag_mem_limit(struct inet_frag_queue *q, int i) +{ + atomic_add(i, &q->net->mem); +} + +static inline void init_frag_mem_limit(struct netns_frags *nf) +{ + atomic_set(&nf->mem, 0); +} + +static inline int sum_frag_mem_limit(struct netns_frags *nf) +{ + return atomic_read(&nf->mem); +} + #endif diff --git a/include/net/ipv6.h b/include/net/ipv6.h index c1878f7049c8..dc30b60975ef 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -288,7 +288,7 @@ static inline int ip6_frag_nqueues(struct net *net) static inline int ip6_frag_mem(struct net *net) { - return atomic_read(&net->ipv6.frags.mem); + return sum_frag_mem_limit(&net->ipv6.frags); } #endif |