From nobody Mon Feb 9 11:05:01 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 26335202969 for ; Fri, 28 Feb 2025 20:00:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740772855; cv=none; b=pzer3Apz+GMqqkMh1wQbK113j7eb7m6wCtm+sFxqmgCy69B+FpfAuny4+Fur3e14+34D/7I+B2LxhBPAZNIcC4m2fNe9XIImG+qP3k93pSs5QbDok8bDKugWcVVaBih6V+Jj4CzvZw4djBUR2iiW1+iNp8Ki7ZvfiLN9aJKDirM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740772855; c=relaxed/simple; bh=Vgq+4LTKvTWv8HNaZjiwB29Tb0yCsLeMwjgrw0SCprc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ZiKuGzQ/mFU5JMCX5/5tSD2ef+Mg2wQEIMKNKDhWuYQYUh9IE+4T0wViEREwRR8epWw7OnzJ1TTzzRAJyYJjlOEGt/tf0PPGrHH5ulkJwA/ElvqLrN2S9nU/GdF1XZOIXhnKKZcif0C5dF6+lVfvVx00vvwclZ95KdGlVeWPe7w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 83105150C; Fri, 28 Feb 2025 12:01:08 -0800 (PST) Received: from merodach.members.linode.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1419A3F5A1; Fri, 28 Feb 2025 12:00:49 -0800 (PST) From: James Morse To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Reinette Chatre , Thomas Gleixner , Ingo Molnar , Borislav Petkov , H Peter Anvin , Babu Moger , James Morse , shameerali.kolothum.thodi@huawei.com, D Scott Phillips OS , carl@os.amperecomputing.com, lcherian@marvell.com, bobo.shaobowang@huawei.com, tan.shaopeng@fujitsu.com, baolin.wang@linux.alibaba.com, Jamie Iles , Xin Hao , peternewman@google.com, dfustini@baylibre.com, amitsinght@marvell.com, David Hildenbrand , Rex Nie , Dave Martin , Koba Ko , Shanker Donthineni , fenghuay@nvidia.com, Shaopeng Tan , Tony Luck Subject: [PATCH v7 15/49] x86/resctrl: Move monitor exit work to a resctrl exit call Date: Fri, 28 Feb 2025 19:58:39 +0000 Message-Id: <20250228195913.24895-16-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20250228195913.24895-1-james.morse@arm.com> References: <20250228195913.24895-1-james.morse@arm.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" rdt_put_mon_l3_config() is called via the architecture's resctrl_arch_exit() call, and appears to free the rmid_ptrs[] and closid_num_dirty_rmid[] arrays. In reality this code is marked __exit, and is removed by the linker as resctrl can't be built as a module. To separate the filesystem and architecture parts of resctrl, this free()ing work needs to be triggered by the filesystem, as these structures belong to the filesystem code. Rename rdt_put_mon_l3_config() resctrl_mon_resource_exit() and call it from resctrl_exit(). The kfree() is currently dependent on r->mon_capable. Signed-off-by: James Morse Tested-by: Carl Worth # arm64 Tested-by: Shaopeng Tan Reviewed-by: Shaopeng Tan Reviewed-by: Tony Luck Reviewed-by: Reinette Chatre Reviewed-by: Fenghua Yu --- Changes since v4: * Added __exit so it can be removed in the next patch. Changes since v3: * Moved r->mon_capable check under the lock. * Dropped references to resctrl_mon_resource_init() from the commit messag= e. * Fixed more resctrl typos, Changes since v2: * Dropped __exit as needed in the next patch. Change since v1: * [Commit message only] Typo fixes: s/restrl/resctrl/g s/resctl/resctrl/g * [Commit message only] Reword second paragraph to remove reference to the MPAM error interrupt, which provides background rationale for a later patch rather than for this patch, and so it is not really relevant here. --- arch/x86/kernel/cpu/resctrl/core.c | 5 ----- arch/x86/kernel/cpu/resctrl/internal.h | 2 +- arch/x86/kernel/cpu/resctrl/monitor.c | 12 +++++++++--- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 ++ 4 files changed, 12 insertions(+), 9 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 26ae43659c6c..d04d65754491 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -1076,14 +1076,9 @@ late_initcall(resctrl_arch_late_init); =20 static void __exit resctrl_arch_exit(void) { - struct rdt_resource *r =3D &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; - cpuhp_remove_state(rdt_online); =20 resctrl_exit(); - - if (r->mon_capable) - rdt_put_mon_l3_config(); } =20 __exitcall(resctrl_arch_exit); diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 5f3713fb2eaf..73005ca2dda1 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -586,7 +586,7 @@ void closid_free(int closid); int alloc_rmid(u32 closid); void free_rmid(u32 closid, u32 rmid); int rdt_get_mon_l3_config(struct rdt_resource *r); -void __exit rdt_put_mon_l3_config(void); +void __exit resctrl_mon_resource_exit(void); bool __init rdt_cpu_has(int flag); void mon_event_count(void *info); int rdtgroup_mondata_show(struct seq_file *m, void *arg); diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/re= sctrl/monitor.c index e8388d19a579..15e8c0190bfc 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -1040,10 +1040,13 @@ static int dom_data_init(struct rdt_resource *r) return err; } =20 -static void __exit dom_data_exit(void) +static void __exit dom_data_exit(struct rdt_resource *r) { mutex_lock(&rdtgroup_mutex); =20 + if (!r->mon_capable) + goto out_unlock; + if (IS_ENABLED(CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID)) { kfree(closid_num_dirty_rmid); closid_num_dirty_rmid =3D NULL; @@ -1052,6 +1055,7 @@ static void __exit dom_data_exit(void) kfree(rmid_ptrs); rmid_ptrs =3D NULL; =20 +out_unlock: mutex_unlock(&rdtgroup_mutex); } =20 @@ -1237,9 +1241,11 @@ int __init rdt_get_mon_l3_config(struct rdt_resource= *r) return 0; } =20 -void __exit rdt_put_mon_l3_config(void) +void __exit resctrl_mon_resource_exit(void) { - dom_data_exit(); + struct rdt_resource *r =3D resctrl_arch_get_resource(RDT_RESOURCE_L3); + + dom_data_exit(r); } =20 void __init intel_rdt_mbm_apply_quirk(void) diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index 9eb57ebb36c6..42c48e79364d 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -4296,4 +4296,6 @@ void __exit resctrl_exit(void) debugfs_remove_recursive(debugfs_resctrl); unregister_filesystem(&rdt_fs_type); sysfs_remove_mount_point(fs_kobj, "resctrl"); + + resctrl_mon_resource_exit(); } --=20 2.39.5