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authorEric Dumazet <edumazet@google.com>2018-06-13 20:11:56 +0300
committerPablo Neira Ayuso <pablo@netfilter.org>2018-06-18 15:13:25 +0300
commit9ce7bc036ae4cfe3393232c86e9e1fea2153c237 (patch)
treeb969b6fb786c98e6341d00573ff56b484e935e69 /include/net
parentba062ebb2cd561d404e0fba8ee4b3f5ebce7cbfc (diff)
downloadlinux-9ce7bc036ae4cfe3393232c86e9e1fea2153c237.tar.xz
netfilter: ipv6: nf_defrag: reduce struct net memory waste
It is a waste of memory to use a full "struct netns_sysctl_ipv6" while only one pointer is really used, considering netns_sysctl_ipv6 keeps growing. Also, since "struct netns_frags" has cache line alignment, it is better to move the frags_hdr pointer outside, otherwise we spend a full cache line for this pointer. This saves 192 bytes of memory per netns. Fixes: c038a767cd69 ("ipv6: add a new namespace for nf_conntrack_reasm") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/net_namespace.h1
-rw-r--r--include/net/netns/ipv6.h1
2 files changed, 1 insertions, 1 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 47e35cce3b64..a71264d75d7f 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -128,6 +128,7 @@ struct net {
#endif
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
struct netns_nf_frag nf_frag;
+ struct ctl_table_header *nf_frag_frags_hdr;
#endif
struct sock *nfnl;
struct sock *nfnl_stash;
diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index c978a31b0f84..762ac9931b62 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -109,7 +109,6 @@ struct netns_ipv6 {
#if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
struct netns_nf_frag {
- struct netns_sysctl_ipv6 sysctl;
struct netns_frags frags;
};
#endif