From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753212AbbC0Ln2 (ORCPT ); Fri, 27 Mar 2015 07:43:28 -0400 Received: from terminus.zytor.com ([198.137.202.10]:37151 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751850AbbC0LnZ (ORCPT ); Fri, 27 Mar 2015 07:43:25 -0400 Date: Fri, 27 Mar 2015 04:42:38 -0700 From: tip-bot for Vincent Guittot Message-ID: Cc: tglx@linutronix.de, preeti@linux.vnet.ibm.com, mingo@kernel.org, peterz@infradead.org, linux-kernel@vger.kernel.org, hpa@zytor.com, vincent.guittot@linaro.org Reply-To: mingo@kernel.org, preeti@linux.vnet.ibm.com, peterz@infradead.org, linux-kernel@vger.kernel.org, hpa@zytor.com, vincent.guittot@linaro.org, tglx@linutronix.de In-Reply-To: <1425052454-25797-11-git-send-email-vincent.guittot@linaro.org> References: <1425052454-25797-11-git-send-email-vincent.guittot@linaro.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] sched: Add SD_PREFER_SIBLING for SMT level Git-Commit-ID: caff37ef96eac7fe96a582d032f6958e834e9447 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 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: caff37ef96eac7fe96a582d032f6958e834e9447 Gitweb: http://git.kernel.org/tip/caff37ef96eac7fe96a582d032f6958e834e9447 Author: Vincent Guittot AuthorDate: Fri, 27 Feb 2015 16:54:13 +0100 Committer: Ingo Molnar CommitDate: Fri, 27 Mar 2015 09:36:05 +0100 sched: Add SD_PREFER_SIBLING for SMT level Add the SD_PREFER_SIBLING flag for SMT level in order to ensure that the scheduler will place at least one task per core. Signed-off-by: Vincent Guittot Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Preeti U. Murthy Cc: Morten.Rasmussen@arm.com Cc: dietmar.eggemann@arm.com Cc: efault@gmx.de Cc: kamalesh@linux.vnet.ibm.com Cc: linaro-kernel@lists.linaro.org Cc: nicolas.pitre@linaro.org Cc: riel@redhat.com Link: http://lkml.kernel.org/r/1425052454-25797-11-git-send-email-vincent.guittot@linaro.org Signed-off-by: Ingo Molnar --- kernel/sched/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 838fc9d..043e2a1 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6240,6 +6240,7 @@ sd_init(struct sched_domain_topology_level *tl, int cpu) */ if (sd->flags & SD_SHARE_CPUCAPACITY) { + sd->flags |= SD_PREFER_SIBLING; sd->imbalance_pct = 110; sd->smt_gain = 1178; /* ~15% */