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authorEric Dumazet <eric.dumazet@gmail.com>2010-11-29 08:14:37 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-01 12:47:42 -0800
commitf2cd2d3e9b3ef960612e362f0ad129d735452df2 (patch)
treebef1868cfc7dc66de7b2430a4b47b12bced05ec1 /net/core/net-sysfs.c
parent0793f83f0ec2142d06abe53570417c8d95e0310a (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 'net/core/net-sysfs.c')
-rw-r--r--net/core/net-sysfs.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index f85cee3d869e..85e8b5326dd6 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -913,6 +913,7 @@ static ssize_t store_xps_map(struct netdev_queue *queue,
struct xps_map *map, *new_map;
struct xps_dev_maps *dev_maps, *new_dev_maps;
int nonempty = 0;
+ int numa_node = -2;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
@@ -953,7 +954,14 @@ static ssize_t store_xps_map(struct netdev_queue *queue,
pos = map_len = alloc_len = 0;
need_set = cpu_isset(cpu, *mask) && cpu_online(cpu);
-
+#ifdef CONFIG_NUMA
+ if (need_set) {
+ if (numa_node == -2)
+ numa_node = cpu_to_node(cpu);
+ else if (numa_node != cpu_to_node(cpu))
+ numa_node = -1;
+ }
+#endif
if (need_set && pos >= map_len) {
/* Need to add queue to this CPU's map */
if (map_len >= alloc_len) {
@@ -1001,6 +1009,8 @@ static ssize_t store_xps_map(struct netdev_queue *queue,
if (dev_maps)
call_rcu(&dev_maps->rcu, xps_dev_maps_release);
+ netdev_queue_numa_node_write(queue, (numa_node >= 0) ? numa_node : -1);
+
mutex_unlock(&xps_map_mutex);
free_cpumask_var(mask);