From nobody Mon Feb 9 15:50:31 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (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 A2B0723C501 for ; Wed, 21 May 2025 22:51:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747867865; cv=none; b=RlG7Y0mYS5IkKRRkAo6XfmGTy/fscOeqsTVWUyqW7ge0/oiAWOdxvPxOvhja+I4Hk2AeELZutQJMV/dSMnk9SuBVi1d7dGr1IM2P6+Dx6IJFoPwdzL23yNypV27G5Wju3px+xYm55t6dmMtmuosTMVjFfdJ9VDPbDTtt0s2TKqc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747867865; c=relaxed/simple; bh=SDaugYWsXAZOMN3McHsAwSd3XAzRSKSYbucAMxD81bc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oKGCS/b2qqmBQ9P4D1y3JM1izApcv1nLcWCT3n2qFf/dA6/E6n1DhjUFzSesVKNng5tiz2wXJFAhFNuhC3+7FcZdB6v1Vc9/0b3CtxXxjX15btcwbMJG6ejm17oG5LHZZAjtOJ+dbgbArXwF1Q7yRI0fJoQqtLTM0ALLihnrJ+c= 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=MmeLXv4F; arc=none smtp.client-ip=198.175.65.14 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="MmeLXv4F" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1747867864; x=1779403864; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SDaugYWsXAZOMN3McHsAwSd3XAzRSKSYbucAMxD81bc=; b=MmeLXv4FAfwyOFHasDWnom8h5NcitUaqW3qqPkN2DUT3UH/ISsCxWLWh zPXnpSy3/63ckLDr10cP4WJzkDoFBFlbxaJBuwViqtkPLlA1X+sZWLGhz WrI0x6Bs5BtUiXUQfF5m0altg1udYNZ5259A+SomdF0VlHxbMMJPVps9K l4nsAtfkTnTqLl+Uml7ZDGe2tsnrflVZJ/1sECdvbbUKBrG6G9SDbIzDY QvNCBQ61Ut/akgdtJ4Dtit1x1babwD58F/3uMwoFP/6qGKfLRErvAUFNg vkIqUSV96wpGE5E/AJhHsuz4d4V0eyn6PrP4ZiaiN3gd912s2sX8bxV96 Q==; X-CSE-ConnectionGUID: sJGPkRNXQKmmZnzzd0IevQ== X-CSE-MsgGUID: sH2m0Q94QGqIHxtMcYNkDg== X-IronPort-AV: E=McAfee;i="6700,10204,11440"; a="53677666" X-IronPort-AV: E=Sophos;i="6.15,304,1739865600"; d="scan'208";a="53677666" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 May 2025 15:50:57 -0700 X-CSE-ConnectionGUID: znuLcpe2RNCyNAucDITqAQ== X-CSE-MsgGUID: aIBn2m5pTSOHEQidYHnb8g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,304,1739865600"; d="scan'208";a="141352147" Received: from agluck-desk3.sc.intel.com ([172.25.103.51]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 May 2025 15:50:57 -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 v5 09/29] x86,fs/resctrl: Refactor domain_remove_cpu_mon() ready for new domain types Date: Wed, 21 May 2025 15:50:27 -0700 Message-ID: <20250521225049.132551-10-tony.luck@intel.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250521225049.132551-1-tony.luck@intel.com> References: <20250521225049.132551-1-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" Historically all monitoring events have been associated with the L3 resource. This will change when support for telemetry events is added. 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. 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 directories from mon_data. resctrl_offline_mon_domain() will still need 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 990a0c1af634..e4125161ffbd 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -643,17 +643,22 @@ 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(); l3_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 8aa9a7e68a59..828c743ec470 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -4041,6 +4041,9 @@ 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 done; + 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)) { @@ -4057,7 +4060,7 @@ void resctrl_offline_mon_domain(struct rdt_resource *= r, struct rdt_mon_domain *d } =20 domain_destroy_mon_state(d); - +done: mutex_unlock(&rdtgroup_mutex); } =20 --=20 2.49.0