From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757403Ab3LHGQN (ORCPT ); Sun, 8 Dec 2013 01:16:13 -0500 Received: from e28smtp01.in.ibm.com ([122.248.162.1]:41144 "EHLO e28smtp01.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753463Ab3LHGPX (ORCPT ); Sun, 8 Dec 2013 01:15:23 -0500 From: Wanpeng Li To: Andrew Morton , Ingo Molnar Cc: Rik van Riel , Mel Gorman , Peter Zijlstra , Naoya Horiguchi , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Wanpeng Li Subject: [PATCH v3 09/12] sched/numa: fix task scan rate adjustment Date: Sun, 8 Dec 2013 14:14:50 +0800 Message-Id: <1386483293-15354-9-git-send-email-liwanp@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1386483293-15354-1-git-send-email-liwanp@linux.vnet.ibm.com> References: <1386483293-15354-1-git-send-email-liwanp@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13120806-4790-0000-0000-00000BB29FC1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org commit 04bb2f947 (sched/numa: Adjust scan rate in task_numa_placement) calculate period_slot which should be used as base value of scan rate increase if remote access dominate. However, current codes forget to use it, this patch fix it. Signed-off-by: Wanpeng Li --- kernel/sched/fair.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7073c76..b077f1b3 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1358,7 +1358,7 @@ static void update_task_scan_period(struct task_struct *p, */ period_slot = DIV_ROUND_UP(diff, NUMA_PERIOD_SLOTS); ratio = DIV_ROUND_UP(private * NUMA_PERIOD_SLOTS, (private + shared)); - diff = (diff * ratio) / NUMA_PERIOD_SLOTS; + diff = (period_slot * ratio) / NUMA_PERIOD_SLOTS; } p->numa_scan_period = clamp(p->numa_scan_period + diff, -- 1.7.5.4