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authorTom Herbert <therbert@google.com>2011-01-31 16:23:42 -0800
committerDavid S. Miller <davem@davemloft.net>2011-01-31 16:23:42 -0800
commit8587523640441a9ff2564ebc6efeb39497ad6709 (patch)
treec42ae4809263f9db59ee0721eb03e1b9b18fb0b1 /net
parentcc09b5f6466528867b280f6eb4077311aa099588 (diff)
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>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 93e44dbf679..4c907895876 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -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;