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[88.189.71.117]) by mx.google.com with ESMTPSA id u5sm11636547wiz.9.2014.10.31.01.48.14 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 31 Oct 2014 01:48:15 -0700 (PDT) From: Vincent Guittot To: peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, preeti@linux.vnet.ibm.com, Morten.Rasmussen@arm.com, kamalesh@linux.vnet.ibm.com, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org Cc: riel@redhat.com, efault@gmx.de, nicolas.pitre@linaro.org, linaro-kernel@lists.linaro.org, Vincent Guittot Subject: [PATCH v8 08/10] sched: add SD_PREFER_SIBLING for SMT level Date: Fri, 31 Oct 2014 09:47:30 +0100 Message-Id: <1414745252-4895-9-git-send-email-vincent.guittot@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1414745252-4895-1-git-send-email-vincent.guittot@linaro.org> References: <1414745252-4895-1-git-send-email-vincent.guittot@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: vincent.guittot@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.215.51 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Add the SD_PREFER_SIBLING flag for SMT level in order to ensure that the scheduler will put at least 1 task per core. Signed-off-by: Vincent Guittot Reviewed-by: Preeti U. Murthy --- kernel/sched/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 37fb92c..731f2ad 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6165,6 +6165,7 @@ 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% */