diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-11-29 08:14:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-01 12:47:42 -0800 |
| commit | f2cd2d3e9b3ef960612e362f0ad129d735452df2 (patch) | |
| tree | bef1868cfc7dc66de7b2430a4b47b12bced05ec1 /include/linux/netdevice.h | |
| parent | 0793f83f0ec2142d06abe53570417c8d95e0310a (diff) | |
net sched: use xps information for qdisc NUMA affinity
Allocate qdisc memory according to NUMA properties of cpus included in
xps map.
To be effective, qdisc should be (re)setup after changes
of /sys/class/net/eth<n>/queues/tx-<n>/xps_cpus
I added a numa_node field in struct netdev_queue, containing NUMA node
if all cpus included in xps_cpus share same node, else -1.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 4b0c7f3aa32..a9ac5dc26e3 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -508,7 +508,9 @@ struct netdev_queue { #ifdef CONFIG_RPS struct kobject kobj; #endif - +#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) + int numa_node; +#endif /* * write mostly part */ @@ -523,6 +525,22 @@ struct netdev_queue { u64 tx_dropped; } ____cacheline_aligned_in_smp; +static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) +{ +#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) + return q->numa_node; +#else + return -1; +#endif +} + +static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) +{ +#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) + q->numa_node = node; +#endif +} + #ifdef CONFIG_RPS /* * This structure holds an RPS map which can be of variable length. The |