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net-rps: Fix brokeness causing OOO packets

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[ Upstream commit baefa31db2 ]

In commit c445477d74 which adds aRFS to the kernel, the CPU
selected for RFS is not set correctly when CPU is changing.
This is causing OOO packets and probably other issues.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Tom Herbert
2012-11-16 09:04:15 +00:00
committed by Ben Hutchings
parent ff5d468a3f
commit 4affc3ac58
1 changed files with 3 additions and 1 deletions
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4
net/core/dev.c
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@ -2829,8 +2829,10 @@ static int get_rps_cpu(struct net_device *dev, struct sk_buff *skb,
if (unlikely(tcpu != next_cpu) &&
(tcpu == RPS_NO_CPU || !cpu_online(tcpu) ||
((int)(per_cpu(softnet_data, tcpu).input_queue_head -
rflow->last_qtail)) >= 0))
rflow->last_qtail)) >= 0)) {
tcpu = next_cpu;
rflow = set_rps_cpu(dev, skb, rflow, next_cpu);
}
if (tcpu != RPS_NO_CPU && cpu_online(tcpu)) {
*rflowp = rflow;