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net: better pcpu data alignment 

Tunnels can force an alignment of their percpu data to reduce number of
cache lines used in fast path, or read in .ndo_get_stats()

percpu_alloc() is a very fine grained allocator, so any small hole will
be used anyway.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-11-04 23:19:28 +00:00 committed by David S. Miller
parent 2bc8ca40f9
commit 8ce120f118
5 changed files with 5 additions and 5 deletions
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2
drivers/net/veth.c
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@ -27,8 +27,8 @@
struct veth_net_stats { struct veth_net_stats {
u64 rx_packets; u64 rx_packets;
u64 tx_packets;
u64 rx_bytes; u64 rx_bytes;
u64 tx_packets;
u64 tx_bytes; u64 tx_bytes;
u64 rx_dropped; u64 rx_dropped;
struct u64_stats_sync syncp; struct u64_stats_sync syncp;

2
net/ipv4/ip_gre.c
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@ -171,7 +171,7 @@ struct pcpu_tstats {
unsigned long rx_bytes; unsigned long rx_bytes;
unsigned long tx_packets; unsigned long tx_packets;
unsigned long tx_bytes; unsigned long tx_bytes;
}; } __attribute__((aligned(4*sizeof(unsigned long))));
static struct net_device_stats *ipgre_get_stats(struct net_device *dev) static struct net_device_stats *ipgre_get_stats(struct net_device *dev)
{ {

2
net/ipv4/ipip.c
View File

@ -148,7 +148,7 @@ struct pcpu_tstats {
unsigned long rx_bytes; unsigned long rx_bytes;
unsigned long tx_packets; unsigned long tx_packets;
unsigned long tx_bytes; unsigned long tx_bytes;
}; } __attribute__((aligned(4*sizeof(unsigned long))));
static struct net_device_stats *ipip_get_stats(struct net_device *dev) static struct net_device_stats *ipip_get_stats(struct net_device *dev)
{ {

2
net/ipv6/ip6_tunnel.c
View File

@ -93,7 +93,7 @@ struct pcpu_tstats {
unsigned long rx_bytes; unsigned long rx_bytes;
unsigned long tx_packets; unsigned long tx_packets;
unsigned long tx_bytes; unsigned long tx_bytes;
}; } __attribute__((aligned(4*sizeof(unsigned long))));
static struct net_device_stats *ip6_get_stats(struct net_device *dev) static struct net_device_stats *ip6_get_stats(struct net_device *dev)
{ {

2
net/ipv6/sit.c
View File

@ -91,7 +91,7 @@ struct pcpu_tstats {
unsigned long rx_bytes; unsigned long rx_bytes;
unsigned long tx_packets; unsigned long tx_packets;
unsigned long tx_bytes; unsigned long tx_bytes;
}; } __attribute__((aligned(4*sizeof(unsigned long))));
static struct net_device_stats *ipip6_get_stats(struct net_device *dev) static struct net_device_stats *ipip6_get_stats(struct net_device *dev)
{ {