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net sched: use xps information for qdisc NUMA affinity

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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>
This commit is contained in:
Eric Dumazet
2010-11-29 08:14:37 +00:00
committed by David S. Miller
parent 0793f83f0e
commit f2cd2d3e9b
4 changed files with 36 additions and 5 deletions
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5
net/core/dev.c
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@ -5125,9 +5125,10 @@ static int netif_alloc_netdev_queues(struct net_device *dev)
}
dev->_tx = tx;
for (i = 0; i < count; i++)
for (i = 0; i < count; i++) {
netdev_queue_numa_node_write(&tx[i], -1);
tx[i].dev = dev;
}
return 0;
}