From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E5984304BCC for ; Mon, 13 Oct 2025 22:34:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760394843; cv=none; b=Fa5Fm3aPAWIY1gz59BAD0wocRhqj6oRLFyW3b8hYzMpr+ujrQfuHL/yh4n/UWDG8FPd79zQrtB4LXdFR/0xACcEdlQiJ/VfDOJJqLmlYOSS0fXsUmKFmRzWM3ok714WVNLkEGlta2Qdlyr9UCsIeMAw0SdMvtzjdvl40Hm1QFDo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760394843; c=relaxed/simple; bh=/hGO1ZbmzYgehJkTwqb+3EV+zea9ICizU5V8kIZ5Fpc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gbprHq7MR/p438/Scdh24lqtvYUMME96ZvQDNr4C30MYVvIrKyJZdP/4POXZeMBezDbRI9S3UTbfMw9R9QM4D5wouDR9cO7ZREIJYBVqjBcElksq+WwEjSS/DuGARaxcWBlzJS47oTxzuXIivmGtmyXMyEPkTqzrM4+c3gJqIwo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Qpf+il87; arc=none smtp.client-ip=198.175.65.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Qpf+il87" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1760394842; x=1791930842; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=/hGO1ZbmzYgehJkTwqb+3EV+zea9ICizU5V8kIZ5Fpc=; b=Qpf+il87+EmnUBDCDXTCBQDsmYrKSQCXHQzpc2ZVOF9IsorwMTkiV26O 55/If6M/nsRJcetLsbqt7gO+MWsCh2a18PaPBr4XL1TSV09uBxE0ZdLjJ TVu2EOKU3UBWZwKdZ2vzdsZ0Fr31EE/nus0jxUfOgRDNX7oo9zJPusqN0 w4uvfJNosWn0DDrQTZa3k+o0WXJL08b911bioCuKpXNDxbV6/jsbSRPYI 64VHIoblWjHJZ612Ys4bcUozwb7/ZVzlxiYnliBQx/bjBvbrbfJhGNPYS 4MWY1OV/n1iGP/mAjiJJlwKf/ImQ91TQK4gWpzNlmLfmJqwudFRJXnrEz Q==; X-CSE-ConnectionGUID: i7KxDEbNTRGV0flwg3ciUw== X-CSE-MsgGUID: H9WAiaLSTMOSvQXrntZiNA== X-IronPort-AV: E=McAfee;i="6800,10657,11581"; a="85168782" X-IronPort-AV: E=Sophos;i="6.19,226,1754982000"; d="scan'208";a="85168782" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2025 15:34:00 -0700 X-CSE-ConnectionGUID: YtA4lovYRGyHMLdiQlBzRg== X-CSE-MsgGUID: X+fMTOT9RiSzvYJKiFXDlg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,226,1754982000"; d="scan'208";a="182145254" Received: from sramkris-mobl1.amr.corp.intel.com (HELO agluck-desk3.intel.com) ([10.124.222.79]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2025 15:33:59 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Maciej Wieczor-Retman , Peter Newman , James Morse , Babu Moger , Drew Fustini , Dave Martin , Chen Yu Cc: x86@kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v12 04/31] x86/resctrl: Clean up domain_remove_cpu_ctrl() Date: Mon, 13 Oct 2025 15:33:18 -0700 Message-ID: <20251013223348.103390-5-tony.luck@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013223348.103390-1-tony.luck@intel.com> References: <20251013223348.103390-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit For symmetry with domain_remove_cpu_mon() refactor domain_remove_cpu_ctrl() to take an early return when removing a CPU does not empty the domain. Signed-off-by: Tony Luck Reviewed-by: Reinette Chatre --- arch/x86/kernel/cpu/resctrl/core.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index c7bfaa391e9f..b28663757dcf 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -599,28 +599,27 @@ static void domain_remove_cpu_ctrl(int cpu, struct rdt_resource *r) return; } + cpumask_clear_cpu(cpu, &hdr->cpu_mask); + if (!cpumask_empty(&hdr->cpu_mask)) + return; + if (!domain_header_is_valid(hdr, RESCTRL_CTRL_DOMAIN, r->rid)) return; d = container_of(hdr, struct rdt_ctrl_domain, hdr); hw_dom = resctrl_to_arch_ctrl_dom(d); - cpumask_clear_cpu(cpu, &d->hdr.cpu_mask); - if (cpumask_empty(&d->hdr.cpu_mask)) { - resctrl_offline_ctrl_domain(r, d); - list_del_rcu(&d->hdr.list); - synchronize_rcu(); - - /* - * rdt_ctrl_domain "d" is going to be freed below, so clear - * its pointer from pseudo_lock_region struct. - */ - if (d->plr) - d->plr->d = NULL; - ctrl_domain_free(hw_dom); + resctrl_offline_ctrl_domain(r, d); + list_del_rcu(&hdr->list); + synchronize_rcu(); - return; - } + /* + * rdt_ctrl_domain "d" is going to be freed below, so clear + * its pointer from pseudo_lock_region struct. + */ + if (d->plr) + d->plr->d = NULL; + ctrl_domain_free(hw_dom); } static void domain_remove_cpu_mon(int cpu, struct rdt_resource *r) -- 2.51.0