From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753919Ab3LJJUN (ORCPT ); Tue, 10 Dec 2013 04:20:13 -0500 Received: from e23smtp01.au.ibm.com ([202.81.31.143]:57017 "EHLO e23smtp01.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752615Ab3LJJT7 (ORCPT ); Tue, 10 Dec 2013 04:19:59 -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 v4 09/12] sched/numa: fix period_slot recalculation Date: Tue, 10 Dec 2013 17:19:32 +0800 Message-Id: <1386667175-19952-9-git-send-email-liwanp@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1386667175-19952-1-git-send-email-liwanp@linux.vnet.ibm.com> References: <1386667175-19952-1-git-send-email-liwanp@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13121009-1618-0000-0000-0000051C9732 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changelog: v3 -> v4: * remove period_slot recalculation The original code is as intended and was meant to scale the difference between the NUMA_PERIOD_THRESHOLD and local/remote ratio when adjusting the scan period. The period_slot recalculation can be dropped. Signed-off-by: Wanpeng Li --- kernel/sched/fair.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7073c76..90b9b88 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1356,7 +1356,6 @@ static void update_task_scan_period(struct task_struct *p, * scanning faster if shared accesses dominate as it may * simply bounce migrations uselessly */ - 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; } -- 1.7.7.6