Commit 85875236 authored Jan 31, 2011 by Tom Herbert Committed by David S. Miller Jan 31, 2011

net: Check rps_flow_table when RPS map length is 1



In get_rps_cpu, add check that the rps_flow_table for the device is
NULL when trying to take fast path when RPS map length is one.
Without this, RFS is effectively disabled if map length is one which
is not correct.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent cc09b5f6

net/core/dev.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -2563,7 +2563,8 @@ static int get_rps_cpu(struct net_device dev, struct sk_buff skb,

		map = rcu_dereference(rxqueue->rps_map);
		if (map) {
		if (map->len == 1) {
		if (map->len == 1 &&
		!rcu_dereference_raw(rxqueue->rps_flow_table)) {
		tcpu = map->cpus[0];
		if (cpu_online(tcpu))
		cpu = tcpu;

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