From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) (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 D0A2332936E for ; Thu, 4 Dec 2025 20:54:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764881678; cv=none; b=ggV9a1vby/Nl81DW/x/Ii3UKewhVbFVUfC6i9WHYrsprb/HxZ7lAmtuMrBuaCNTOo8kn8KhDAN3jqz7yU7kCH3URUckCj2zUZfCi4Y1cdSs4q3p6E0hvNw3Dd2jFA86qdOaRPzXEpsPRAoCY89FCUs/tmIj4MiQ5G0vTa3fvtDI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764881678; c=relaxed/simple; bh=miRJzo1AWfZUKy+ImvgvbTXaJITzgINN7ynFnTS9zo4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CK4PYAC1AWhWRv7TCjuRt8HQaM7kSZQTjFtV4DwCqZOdKvPE+l+CWtLPPs3UaGjALfaDu4hEcf+fyMb0c8Grd8oAQKrVbc9108fMLkUevJHsF6GxDoSiWw28bflZS8DvnaK6cWmnX3JB2kdG0tMZqNe5MkKPZ6XDcoFNsHJs/vI= 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=YqOIhTKC; arc=none smtp.client-ip=192.198.163.13 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="YqOIhTKC" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1764881676; x=1796417676; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=miRJzo1AWfZUKy+ImvgvbTXaJITzgINN7ynFnTS9zo4=; b=YqOIhTKCoAA1cp8Zc11ha++LOAiGgMEldMRADA5YdoL1sFvSir7veNcP OubO+ffx8lF6ZQtXh2coUVKZri03UW62j0utqQLq+KaWm5hgVtt6bqqUp nYgpLutsPcjSOdBjwzYKaHkx+J+J1cPF4psgZ0webMH4OifDTtgs6VLKH nF9lRUUQ1nBsaY7QV/WHtQlWzmFpebsmZ+yJbYI5p/P6EbNzuOQXLFkTV UETizMDo3I2jjDnmAL+CRnZ+KE7yqP3mjoW/pSlLghAUIOrTCkMLQM9FC zWxT+9JreYukk2elmsfFA+VZpWK+ZnXwR2SBRIzfASwe4FmuqMXomNXmV Q==; X-CSE-ConnectionGUID: jHFpp5MiQW2bPCJCND7F5Q== X-CSE-MsgGUID: +any79L9RIGQ4Es83kN0pQ== X-IronPort-AV: E=McAfee;i="6800,10657,11632"; a="69511037" X-IronPort-AV: E=Sophos;i="6.20,250,1758610800"; d="scan'208";a="69511037" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Dec 2025 12:54:28 -0800 X-CSE-ConnectionGUID: vqmTcI+hTran4Ekk1jDC4g== X-CSE-MsgGUID: rSTNl2dmRVKzDFfmhUeO/A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,250,1758610800"; d="scan'208";a="225752839" Received: from mgerlach-mobl1.amr.corp.intel.com (HELO agluck-desk3.intel.com) ([10.124.220.165]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Dec 2025 12:54:27 -0800 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 v15 22/32] fs/resctrl: Refactor rmdir_mondata_subdir_allrdtgrp() Date: Thu, 4 Dec 2025 12:53:52 -0800 Message-ID: <20251204205404.12763-23-tony.luck@intel.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251204205404.12763-1-tony.luck@intel.com> References: <20251204205404.12763-1-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 Clearing a monitor group's mon_data directory is complicated because of the support for Sub-NUMA Cluster (SNC) mode. Refactor the SNC case into a helper function to make it easier to add support for a new telemetry resource. Suggested-by: Reinette Chatre Signed-off-by: Tony Luck Reviewed-by: Reinette Chatre --- fs/resctrl/rdtgroup.c | 42 +++++++++++++++++++++++++++++++----------- 1 file changed, 31 insertions(+), 11 deletions(-) diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index c0db5d8999ee..679247c43b1a 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -3228,28 +3228,24 @@ static void mon_rmdir_one_subdir(struct kernfs_node *pkn, char *name, char *subn } /* - * Remove all subdirectories of mon_data of ctrl_mon groups - * and monitor groups for the given domain. - * Remove files and directories containing "sum" of domain data - * when last domain being summed is removed. + * Remove files and directories for one SNC node. If it is the last node + * sharing an L3 cache, then remove the upper level directory containing + * the "sum" files too. */ -static void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r, - struct rdt_domain_hdr *hdr) +static void rmdir_mondata_subdir_allrdtgrp_snc(struct rdt_resource *r, + struct rdt_domain_hdr *hdr) { struct rdtgroup *prgrp, *crgrp; struct rdt_l3_mon_domain *d; char subname[32]; - bool snc_mode; char name[32]; if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) return; d = container_of(hdr, struct rdt_l3_mon_domain, hdr); - snc_mode = r->mon_scope == RESCTRL_L3_NODE; - sprintf(name, "mon_%s_%02d", r->name, snc_mode ? d->ci_id : hdr->id); - if (snc_mode) - sprintf(subname, "mon_sub_%s_%02d", r->name, hdr->id); + sprintf(name, "mon_%s_%02d", r->name, d->ci_id); + sprintf(subname, "mon_sub_%s_%02d", r->name, hdr->id); list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) { mon_rmdir_one_subdir(prgrp->mon.mon_data_kn, name, subname); @@ -3259,6 +3255,30 @@ static void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r, } } +/* + * Remove all subdirectories of mon_data of ctrl_mon groups + * and monitor groups for the given domain. + */ +static void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r, + struct rdt_domain_hdr *hdr) +{ + struct rdtgroup *prgrp, *crgrp; + char name[32]; + + if (r->rid == RDT_RESOURCE_L3 && r->mon_scope == RESCTRL_L3_NODE) { + rmdir_mondata_subdir_allrdtgrp_snc(r, hdr); + return; + } + + sprintf(name, "mon_%s_%02d", r->name, hdr->id); + list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) { + kernfs_remove_by_name(prgrp->mon.mon_data_kn, name); + + list_for_each_entry(crgrp, &prgrp->mon.crdtgrp_list, mon.crdtgrp_list) + kernfs_remove_by_name(crgrp->mon.mon_data_kn, name); + } +} + /* * Create a directory for a domain and populate it with monitor files. Create * summing monitors when @hdr is NULL. No need to initialize summing monitors. -- 2.51.1