| From 1e6fac40ce92bddccdd0ac30a92a0a11b20c73f8 Mon Sep 17 00:00:00 2001 |
| From: Eric Dumazet <edumazt@google.com> |
| Date: Tue, 5 Mar 2013 07:15:13 +0000 |
| Subject: [PATCH] net: reduce net_rx_action() latency to 2 HZ |
| |
| commit d1f41b67ff7735193bc8b418b98ac99a448833e2 upstream. |
| |
| 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> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/net/core/dev.c b/net/core/dev.c |
| index 2aaf2e6..253b409 100644 |
| --- a/net/core/dev.c |
| +++ b/net/core/dev.c |
| @@ -3045,7 +3045,7 @@ 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(); |
| -- |
| 1.8.1.2 |
| |
