From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752884Ab3FDW76 (ORCPT ); Tue, 4 Jun 2013 18:59:58 -0400 Received: from 1wt.eu ([62.212.114.60]:35699 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753680Ab3FDWnS (ORCPT ); Tue, 4 Jun 2013 18:43:18 -0400 Message-Id: <20130604172136.313574799@1wt.eu> User-Agent: quilt/0.48-1 Date: Tue, 04 Jun 2013 19:23:55 +0200 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eric Dumazet , "David S. Miller" , Willy Tarreau Subject: [ 145/184] net: reduce net_rx_action() latency to 2 HZ In-Reply-To: <58df134a4b98edf5b0073e2e1e988fe6@local> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.32-longterm review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet 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 Signed-off-by: David S. Miller (cherry picked from commit d1f41b67ff7735193bc8b418b98ac99a448833e2) Signed-off-by: Willy Tarreau --- net/core/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/dev.c b/net/core/dev.c index f4a6e14..d775563 100644 --- 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(); -- 1.7.12.2.21.g234cd45.dirty