From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754638Ab3LRKgG (ORCPT ); Wed, 18 Dec 2013 05:36:06 -0500 Received: from terminus.zytor.com ([198.137.202.10]:44792 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754312Ab3LRKeC (ORCPT ); Wed, 18 Dec 2013 05:34:02 -0500 Date: Wed, 18 Dec 2013 02:33:17 -0800 From: tip-bot for Wanpeng Li Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, liwanp@linux.vnet.ibm.com, peterz@infradead.org, n-horiguchi@ah.jp.nec.com, riel@redhat.com, akpm@linux-foundation.org, mgorman@suse.de, tglx@linutronix.de, rientjes@google.com Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, liwanp@linux.vnet.ibm.com, peterz@infradead.org, n-horiguchi@ah.jp.nec.com, riel@redhat.com, akpm@linux-foundation.org, mgorman@suse.de, tglx@linutronix.de, rientjes@google.com In-Reply-To: <1386833006-6600-4-git-send-email-liwanp@linux.vnet.ibm.com> References: <1386833006-6600-4-git-send-email-liwanp@linux.vnet.ibm.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] sched/numa: Fix period_slot recalculation Git-Commit-ID: e777b63bbd589248eb151a3191ee92331a701385 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.1 (terminus.zytor.com [127.0.0.1]); Wed, 18 Dec 2013 02:33:23 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: e777b63bbd589248eb151a3191ee92331a701385 Gitweb: http://git.kernel.org/tip/e777b63bbd589248eb151a3191ee92331a701385 Author: Wanpeng Li AuthorDate: Thu, 12 Dec 2013 15:23:26 +0800 Committer: Ingo Molnar CommitDate: Tue, 17 Dec 2013 15:24:41 +0100 sched/numa: Fix 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 Reviewed-by: Naoya Horiguchi Acked-by: Mel Gorman Acked-by: David Rientjes Signed-off-by: Peter Zijlstra Cc: Andrew Morton Cc: Rik van Riel Link: http://lkml.kernel.org/r/1386833006-6600-4-git-send-email-liwanp@linux.vnet.ibm.com Signed-off-by: Ingo Molnar --- kernel/sched/fair.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 37892d7..4316af2 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1342,7 +1342,6 @@ 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; }