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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-10-08 23:18:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-10-08 23:18:04 +0200 |
| commit | 3c689b7320ae6f20dba6a8b71806a6c6fd604ee8 (patch) | |
| tree | f9417dbd9f4aca952a1aba3e9a0f2a5a6e088dcd /include/net/ip.h | |
| parent | udp: Improve port randomization (diff) | |
| download | linux-3c689b7320ae6f20dba6a8b71806a6c6fd604ee8.tar.xz linux-3c689b7320ae6f20dba6a8b71806a6c6fd604ee8.zip | |
inet: cleanup of local_port_range
I noticed sysctl_local_port_range[] and its associated seqlock
sysctl_local_port_range_lock were on separate cache lines.
Moreover, sysctl_local_port_range[] was close to unrelated
variables, highly modified, leading to cache misses.
Moving these two variables in a structure can help data
locality and moving this structure to read_mostly section
helps sharing of this data among cpus.
Cleanup of extern declarations (moved in include file where
they belong), and use of inet_get_local_port_range()
accessor instead of direct access to ports values.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip.h')
| -rw-r--r-- | include/net/ip.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index d678ea3d474a..1cbccaf0de3f 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -178,6 +178,10 @@ extern unsigned long snmp_fold_field(void *mib[], int offt); extern int snmp_mib_init(void *ptr[2], size_t mibsize); extern void snmp_mib_free(void *ptr[2]); +extern struct local_ports { + seqlock_t lock; + int range[2]; +} sysctl_local_ports; extern void inet_get_local_port_range(int *low, int *high); extern int sysctl_ip_default_ttl; |