GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-25 16:11:45 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

netns: introduce the net_hash_mix "salt" for hashes

Browse source 
There are many possible ways to add this "salt", thus I made this
patch to be the last in the series to change it if required.

Currently I propose to use the struct net pointer itself as this 
salt, but since this pointer is most often cache-line aligned, shift 
this right to eliminate the bits, that are most often zeroed.

After this, simply add this mix to prepared hashfn-s.

For CONFIG_NET_NS=n case this salt is 0 and no changes in hashfn
appear.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2008-06-16 17:14:11 -07:00 • committed by David S. Miller
parent 33de014c63
commit 0b4419162a
5 changed files with 30 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/net/inet6_hashtables.h
View file

@ -24,6 +24,7 @@
#include <net/inet_sock.h>
#include <net/ipv6.h>
#include <net/netns/hash.h>
struct inet_hashinfo;
@ -36,7 +37,7 @@ static inline unsigned int inet6_ehashfn(struct net *net,
return jhash_3words((__force u32)laddr->s6_addr32[3],
(__force u32)faddr->s6_addr32[3],
ports, inet_ehash_secret);
ports, inet_ehash_secret + net_hash_mix(net));
}
static inline int inet6_sk_ehashfn(const struct sock *sk)