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authorTom Herbert <therbert@google.com>2012-11-16 09:04:15 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-26 11:34:36 -0800
commit3cc4eadd5674d1f00be32e5e4bdc74fbb3714185 (patch)
tree4c6ecc911d152ce6af7c91653f1df48c907d2e05 /net
parentc5d6a966762eb5bac5960235461fd6893aaa8498 (diff)
downloadlwn-3cc4eadd5674d1f00be32e5e4bdc74fbb3714185.tar.gz
lwn-3cc4eadd5674d1f00be32e5e4bdc74fbb3714185.zip
net-rps: Fix brokeness causing OOO packets
[ Upstream commit baefa31db2f2b13a05d1b81bdf2d20d487f58b0a ] In commit c445477d74ab3779 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 5b84eafb1a63..465f1f62766e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2706,8 +2706,10 @@ 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;