net: reduce net_rx_action() latency to 2 HZ

We should use time_after_eq() to get maximum latency of two ticks,
instead of three.

Bug added in commit 24f8b2385 (net: increase receive packet quantum)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit d1f41b67ff7735193bc8b418b98ac99a448833e2)
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/net/core/dev.c b/net/core/dev.c
index f4a6e1439963886421e39db4d62e16848249e171..d77556322046b2bd1119d3f96e1502e40c23c467 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2848,7 +2848,7 @@ static void net_rx_action(struct softirq_action *h)
                 * Allow this to run for 2 jiffies since which will allow
                 * an average latency of 1.5/HZ.
                 */
-               if (unlikely(budget <= 0 || time_after(jiffies, time_limit)))
+               if (unlikely(budget <= 0 || time_after_eq(jiffies, time_limit)))
                        goto softnet_break;
 
                local_irq_enable();