From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D59FC433EF for ; Sun, 3 Apr 2022 17:59:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359730AbiDCSB2 (ORCPT ); Sun, 3 Apr 2022 14:01:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239569AbiDCSB1 (ORCPT ); Sun, 3 Apr 2022 14:01:27 -0400 Received: from out1.migadu.com (out1.migadu.com [91.121.223.63]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33D1C12751 for ; Sun, 3 Apr 2022 10:59:31 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1649008769; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ALNqJsH4yAiUEiLVkeA1F4OJa4cTSsJo9XYSut55pQA=; b=duWJ8QWhoNvoCTWhJ+bCDxbe4yEKfPnWYXBOuAZMQ0hBB0l6xciMihzjZ3EPfpeSAUM3Tq 7OffKyANWnkBMKSuq+8d72/brbjHnmWkvz8CcAS/T7t9hfkSudioLFxJt+uXz3dN72X8Y3 rKLtXMm7en2iHj9hFdC7vqj4/gOZi6s= From: Tao Zhou To: linux-kernel@vger.kernel.org, tao.zhou@linux.dev Subject: [PATCH] sched/fair: Revise comment about lb decision matrix Date: Mon, 4 Apr 2022 01:59:46 +0800 Message-Id: <20220403175946.7323-1-tao.zhou@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If busiest group type is group_misfit_task, the local group type must be group_has_spare according to below code in update_sd_pick_busiest(): if (sgs->group_type == group_misfit_task && (!capacity_greater(capacity_of(env->dst_cpu), sg->sgc->max_capacity) || sds->local_stat.group_type != group_has_spare)) return false; group type imbalanced and overloaded and fully_busy are filtered in here. misfit and asym are filtered before in update_sg_lb_stats(). So, change the decision matrix to: busiest \ local has_spare fully_busy misfit asym imbalanced overloaded has_spare nr_idle balanced N/A N/A balanced balanced fully_busy nr_idle nr_idle N/A N/A balanced balanced misfit_task force N/A N/A N/A *N/A* *N/A* asym_packing force force N/A N/A force force imbalanced force force N/A N/A force force overloaded force force N/A N/A force avg_load --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 5146163bfabb..5765d96202c7 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -9441,7 +9441,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s * busiest \ local has_spare fully_busy misfit asym imbalanced overloaded * has_spare nr_idle balanced N/A N/A balanced balanced * fully_busy nr_idle nr_idle N/A N/A balanced balanced - * misfit_task force N/A N/A N/A force force + * misfit_task force N/A N/A N/A N/A N/A * asym_packing force force N/A N/A force force * imbalanced force force N/A N/A force force * overloaded force force N/A N/A force avg_load -- 2.35.1