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[82.127.83.212]) by mx.google.com with ESMTPSA id q13sm12311485wie.8.2013.04.25.10.25.16 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 25 Apr 2013 10:25:17 -0700 (PDT) From: Vincent Guittot To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org, peterz@infradead.org, mingo@kernel.org, linux@arm.linux.org.uk, pjt@google.com, santosh.shilimkar@ti.com, Morten.Rasmussen@arm.com, chander.kashyap@linaro.org, cmetcalf@tilera.com, tony.luck@intel.com, alex.shi@intel.com, preeti@linux.vnet.ibm.com Cc: paulmck@linux.vnet.ibm.com, tglx@linutronix.de, len.brown@intel.com, arjan@linux.intel.com, amit.kucheria@linaro.org, corbet@lwn.net, l.majewski@samsung.com, Vincent Guittot Subject: [PATCH 14/14] sched: force migration on buddy CPU Date: Thu, 25 Apr 2013 19:23:30 +0200 Message-Id: <1366910611-20048-15-git-send-email-vincent.guittot@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1366910611-20048-1-git-send-email-vincent.guittot@linaro.org> References: <1366910611-20048-1-git-send-email-vincent.guittot@linaro.org> X-Gm-Message-State: ALoCoQl/694ld7FbFOfvmMg1y4YXTPmhU7haTClUVY5kXeztKQDdMrsOcPuhrWYMJQmy9PkNTH0z X-Original-Sender: vincent.guittot@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 2607:f8b0:400c:c02::229 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , If a CPU that doesn't participate to the packing effort, has at least one running task, it means that its group is imbalanced and the CPUs can pull this task. Signed-off-by: Vincent Guittot --- kernel/sched/fair.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 54c1541..f87aed2 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4729,6 +4729,9 @@ static inline void update_sg_lb_stats(struct lb_env *env, max_nr_running = nr_running; if (min_nr_running > nr_running) min_nr_running = nr_running; + + if (!is_my_buddy(i, i) && nr_running > 0) + sgs->group_imb = 1; } sgs->group_load += load;