From nobody Sun Oct 5 01:47:27 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (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 B9EB82E1741 for ; Mon, 11 Aug 2025 18:17:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754936257; cv=none; b=ATRmkT/ItDNQYLdhDHhkP9u0/6PNdWp34Cb9yjvVZ35Oa/Bj2iGCec/1HCuG9tAMn6GBdjgjJW9PcjGGToifWeEDqv1xfc1RdndrNvqKAjXO2UWaazAdRY5CqCUNlkJ+2EYmitnWNIm6+BIiimnVIyBs+79suep6KJz3YNe+E00= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754936257; c=relaxed/simple; bh=a3IoQ4GLCGMOmHG8RwRmViQVRz47yCvJdkrtlgqqV3Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rU5bcIzIe+wnRGlkdWn37T/N+HSTKTmfLf0d3qWqlz+NTuNU0pv8WsguV9T64fOx3ajSB3KzVmYECVUAhI/JuGcw1aHcfSLX3YaFZyNv7ofA68FRI5EtT0dYrw6CSy5CdVQg6KuII3xwzqS6w4TT7uS8FKfm3GWCylpjjQGNRPg= 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=I1qtIsTn; arc=none smtp.client-ip=198.175.65.13 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="I1qtIsTn" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1754936256; x=1786472256; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=a3IoQ4GLCGMOmHG8RwRmViQVRz47yCvJdkrtlgqqV3Y=; b=I1qtIsTnmRQ9MehXRm52ShNqsRQ93DUGaJBVDpIqNO4RL6elJd1LwIW0 ezkemXYTyvXSmNbA7ZxPOTFpLf9P+JNsJ7toyQVssVofYCrljekMwv8CA 6d3hKTe1g0z2ZcbZOij+9T5j9Hd3n7zwKgrKWAi6cJwdMqYptV/K8qNO/ GTnyDoBXfJM6Dbn8ZkHUjsZ0IbW2zMMKdyGW/Q0lpns/PPY+y1yywQWEb o7o2/2U/jS4ka/CkndAYrPxOT91j6GWsbyDDu0yRfTBegd5ijkLYnA+vG P1wSIp/FUfollTsGx5Got5qc3/IbWF2f/gNk0NCTkh0xe84qJxy7uKlM5 Q==; X-CSE-ConnectionGUID: KmB6Ojk8T1uHD+ljlt+80g== X-CSE-MsgGUID: vYG4xxCtRhmgSUXQHbQudg== X-IronPort-AV: E=McAfee;i="6800,10657,11518"; a="68277371" X-IronPort-AV: E=Sophos;i="6.17,278,1747724400"; d="scan'208";a="68277371" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Aug 2025 11:17:26 -0700 X-CSE-ConnectionGUID: cKmOIHcTRaiza2KEJwTpxA== X-CSE-MsgGUID: 2UofFD33R6OOrswfaDe9DQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.17,278,1747724400"; d="scan'208";a="196825631" Received: from puneetse-mobl.amr.corp.intel.com (HELO agluck-desk3.home.arpa) ([10.124.221.229]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Aug 2025 11:17:23 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Maciej Wieczor-Retman , Peter Newman , James Morse , Babu Moger , Drew Fustini , Dave Martin , Anil Keshavamurthy , Chen Yu Cc: x86@kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v8 07/32] x86,fs/resctrl: Refactor domain_remove_cpu_mon() ready for new domain types Date: Mon, 11 Aug 2025 11:16:41 -0700 Message-ID: <20250811181709.6241-8-tony.luck@intel.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250811181709.6241-1-tony.luck@intel.com> References: <20250811181709.6241-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" All monitoring events are associated with the L3 resource. The RDT_RESOURCE_L3 resource carries a lot of state in the domain structures which needs to be dealt with when a domain is taken offline by removing the last CPU in the domain. New telemetry events will be associated with a new package scoped resource with new domain structures. Refactor domain_remove_cpu_mon() so all the L3 processing is separated from general actions of clearing the CPU bit in the mask and removing sub-directories from the mon_data directory. resctrl_offline_mon_domain() continues to remove domain specific directories and files from the "mon_data" directories, but can skip the L3 resource specific cleanup when called for other resource types. Signed-off-by: Tony Luck --- arch/x86/kernel/cpu/resctrl/core.c | 17 +++++++++++------ fs/resctrl/rdtgroup.c | 5 ++++- 2 files changed, 15 insertions(+), 7 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 66270c230b4e..448c2bf9837d 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -649,17 +649,22 @@ static void domain_remove_cpu_mon(int cpu, struct rdt= _resource *r) if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, r->rid)) return; =20 - d =3D container_of(hdr, struct rdt_mon_domain, hdr); - hw_dom =3D resctrl_to_arch_mon_dom(d); + cpumask_clear_cpu(cpu, &hdr->cpu_mask); + if (!cpumask_empty(&hdr->cpu_mask)) + return; =20 - cpumask_clear_cpu(cpu, &d->hdr.cpu_mask); - if (cpumask_empty(&d->hdr.cpu_mask)) { + switch (r->rid) { + case RDT_RESOURCE_L3: + d =3D container_of(hdr, struct rdt_mon_domain, hdr); + hw_dom =3D resctrl_to_arch_mon_dom(d); resctrl_offline_mon_domain(r, d); list_del_rcu(&d->hdr.list); synchronize_rcu(); mon_domain_free(hw_dom); - - return; + break; + default: + pr_warn_once("Unknown resource rid=3D%d\n", r->rid); + break; } } =20 diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index 77336d5e4915..05438e15e2ca 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -4047,6 +4047,9 @@ void resctrl_offline_mon_domain(struct rdt_resource *= r, struct rdt_mon_domain *d if (resctrl_mounted && resctrl_arch_mon_capable()) rmdir_mondata_subdir_allrdtgrp(r, d); =20 + if (r->rid !=3D RDT_RESOURCE_L3) + goto out_unlock; + if (resctrl_is_mbm_enabled()) cancel_delayed_work(&d->mbm_over); if (resctrl_is_mon_event_enabled(QOS_L3_OCCUP_EVENT_ID) && has_busy_rmid(= d)) { @@ -4063,7 +4066,7 @@ void resctrl_offline_mon_domain(struct rdt_resource *= r, struct rdt_mon_domain *d } =20 domain_destroy_mon_state(d); - +out_unlock: mutex_unlock(&rdtgroup_mutex); } =20 --=20 2.50.1