Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754461AbaBEUFT (ORCPT ); Wed, 5 Feb 2014 15:05:19 -0500 Received: from mail1.windriver.com ([147.11.146.13]:48062 "EHLO mail1.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754343AbaBEUFF (ORCPT ); Wed, 5 Feb 2014 15:05:05 -0500 From: Paul Gortmaker To: , CC: Eric Dumazet , Eric Dumazet , "David S. Miller" , Paul Gortmaker Subject: [v2.6.34-stable 057/213] net: reduce net_rx_action() latency to 2 HZ Date: Wed, 5 Feb 2014 15:00:12 -0500 Message-ID: <1391630568-49251-58-git-send-email-paul.gortmaker@windriver.com> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1391630568-49251-1-git-send-email-paul.gortmaker@windriver.com> References: <1391630568-49251-1-git-send-email-paul.gortmaker@windriver.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eric Dumazet ------------------- This is a commit scheduled for the next v2.6.34 longterm release. http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git If you see a problem with using this for longterm, please comment. ------------------- 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 Signed-off-by: David S. Miller Signed-off-by: Paul Gortmaker --- 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 2aaf2e610f92..253b409fe3ab 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(); -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/