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| author | Eric Dumazet <dada1@cosmosbay.com> | 2005-08-26 12:05:31 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-08-29 16:11:18 -0700 |
| commit | ba89966c1984513f4f2cc0a6c182266be44ddd03 (patch) | |
| tree | 6e5766fc5c287708c03e0a162531dfd4785b0703 /net/ipv4/udp.c | |
| parent | 29cb9f9c5502f6218cd3ea574efe46a5e55522d2 (diff) | |
| download | lwn-ba89966c1984513f4f2cc0a6c182266be44ddd03.tar.gz lwn-ba89966c1984513f4f2cc0a6c182266be44ddd03.zip | |
[NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointers
This patch puts mostly read only data in the right section
(read_mostly), to help sharing of these data between CPUS without
memory ping pongs.
On one of my production machine, tcp_statistics was sitting in a
heavily modified cache line, so *every* SNMP update had to force a
reload.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 3a5bbbe7dd85..e5beca7de86c 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -113,7 +113,7 @@ * Snmp MIB for the UDP layer */ -DEFINE_SNMP_STAT(struct udp_mib, udp_statistics); +DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly; struct hlist_head udp_hash[UDP_HTABLE_SIZE]; DEFINE_RWLOCK(udp_hash_lock); |