diff options
| author | Eric Dumazet <edumazet@google.com> | 2018-06-13 10:11:56 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-24 13:12:26 +0200 |
| commit | a677cc36431f68c1208bfe288fa5f407c0114094 (patch) | |
| tree | 34d2943d4ab25a5a22f403c776e10afed91040c0 /include/net/net_namespace.h | |
| parent | 00fb7e1404725edced5d6f77b0333b94bdd3413e (diff) | |
| download | linux-stable-a677cc36431f68c1208bfe288fa5f407c0114094.tar.gz linux-stable-a677cc36431f68c1208bfe288fa5f407c0114094.tar.bz2 linux-stable-a677cc36431f68c1208bfe288fa5f407c0114094.zip | |
netfilter: ipv6: nf_defrag: reduce struct net memory waste
[ Upstream commit 9ce7bc036ae4cfe3393232c86e9e1fea2153c237 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net/net_namespace.h')
| -rw-r--r-- | include/net/net_namespace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 23102da24dd9..c05db6ff2515 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -116,6 +116,7 @@ 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; |