Eric Lee / smarc-ti-linux-kernel

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Commit baefa31db2f2b13a05d1b81bdf2d20d487f58b0a

Authored by Tom Herbert
Committed by David S. Miller
1 parent 2a95388353
Exists in master and in 20 other branches dlt-processor-sdk-linux-03.00.00.04, newt-ti-linux-3.12.y, processor-sdk-linux-01.00.00, processor-sdk-linux-02.00.01, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y, smarc-ti-linux-3.14.y, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.12.y, ti-linux-3.14.y, ti-linux-3.15.y, ti-lsk-linux-4.1.y

net-rps: Fix brokeness causing OOO packets 

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>

Showing 1 changed file with 3 additions and 1 deletions Side-by-side Diff

... ... @@ -2818,8 +2818,10 @@
2818 2818 if (unlikely(tcpu != next_cpu) &&
2819 2819 (tcpu == RPS_NO_CPU || !cpu_online(tcpu) ||
2820 2820 ((int)(per_cpu(softnet_data, tcpu).input_queue_head -
2821   - rflow->last_qtail)) >= 0))
  2821 + rflow->last_qtail)) >= 0)) {
  2822 + tcpu = next_cpu;
2822 2823 rflow = set_rps_cpu(dev, skb, rflow, next_cpu);
  2824 + }
2823 2825  
2824 2826 if (tcpu != RPS_NO_CPU && cpu_online(tcpu)) {
2825 2827 *rflowp = rflow;