From nobody Sat Feb 7 15:35:26 2026 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 6A597EB64DD for ; Wed, 12 Jul 2023 17:36:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232864AbjGLRgS (ORCPT ); Wed, 12 Jul 2023 13:36:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231602AbjGLRgQ (ORCPT ); Wed, 12 Jul 2023 13:36:16 -0400 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56E061BD for ; Wed, 12 Jul 2023 10:36:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1689183375; x=1720719375; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=L2w7h+1zojcVdKco4DovJ69ANkFD1mq7GmkWM2ppddQ=; b=eYwnbqnE39MEk5CxU5XFlxl7j7QO5UjH0UZaHzjV7OxxtXKZf2+EcPk8 gDFunCBjWX/j/YESFA/BAfD7UGwm2Z6ibt55Mw6frAX/FLKYj1DeGHq/a CXFddYIrd20tyilcKBd31vH+2eUEtf813iz8i4SZ8wKuTqF5w8qHM/6df ZyAg2QxC4hBeCWHFhbsV3Nnd1n7pu57J22gfLUKiZK3V/Sm5APEeBlkZX EPKRULvj6ngP580kP3bhU+MBiCaP3fgpg7fnCcmEWCE+GeHmSrxkWN83B ieMUs1YB335/IGj5I84Z4FAWhea0vPsme9BUTW8TukShXc1HNRct4PMxx w==; X-IronPort-AV: E=McAfee;i="6600,9927,10769"; a="451318710" X-IronPort-AV: E=Sophos;i="6.01,200,1684825200"; d="scan'208";a="451318710" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2023 10:36:08 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10769"; a="845734325" X-IronPort-AV: E=Sophos;i="6.01,200,1684825200"; d="scan'208";a="845734325" Received: from chenyu-dev.sh.intel.com ([10.239.62.164]) by orsmga004.jf.intel.com with ESMTP; 12 Jul 2023 10:36:05 -0700 From: Chen Yu To: Peter Zijlstra , Juri Lelli , Vincent Guittot , Ingo Molnar Cc: Ricardo Neri , Tim Chen , Yicong Yang , linux-kernel@vger.kernel.org, Chen Yu Subject: [PATCH] sched/topology: Align group flags when removing degenerate domain Date: Thu, 13 Jul 2023 09:31:33 +0800 Message-Id: <20230713013133.2314153-1-yu.c.chen@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The flags of the child of a given scheduling domain are used to initialize the flags of its scheduling groups. When the child of a scheduling domain is degenerated, the flags of its local scheduling group need to be updated to align with the flags of its new child domain. The flag SD_SHARE_CPUCAPACITY was aligned in Commit bf2dc42d6beb ("sched/topology: Propagate SMT flags when removing deg= enerate domain"). Further generalize this alignment so other flags can be used later, such as in cluster-based task wakeup. [1] Link: https://lore.kernel.org/lkml/20230530115527.GC156198@hirez.programmin= g.kicks-ass.net #1 Suggested-by: Ricardo Neri Reported-by: Yicong Yang Closes: https://lore.kernel.org/lkml/ce714341-af58-2522-69a8-321f02c82893@h= uawei.com/ Signed-off-by: Chen Yu Reviewed-by: Tim Chen Reviewed-by: Yicong Yang --- kernel/sched/topology.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index d3a3b2646ec4..ff02d7deec0c 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -722,8 +722,7 @@ cpu_attach_domain(struct sched_domain *sd, struct root_= domain *rd, int cpu) =20 if (parent->parent) { parent->parent->child =3D tmp; - if (tmp->flags & SD_SHARE_CPUCAPACITY) - parent->parent->groups->flags |=3D SD_SHARE_CPUCAPACITY; + parent->parent->groups->flags =3D tmp->flags; } =20 /* --=20 2.25.1