From patchwork Fri Mar 17 15:15:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Waiman Long X-Patchwork-Id: 13179199 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3A0BC74A5B for ; Fri, 17 Mar 2023 15:16:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231735AbjCQPQi (ORCPT ); Fri, 17 Mar 2023 11:16:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44170 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230232AbjCQPQf (ORCPT ); Fri, 17 Mar 2023 11:16:35 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4C0FA6FFCE for ; Fri, 17 Mar 2023 08:15:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1679066135; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yyPOMwQLISxSVk5Hax7mBc5lUymcLlOh64gwiaoZAvQ=; b=RhCycSMZxz/FIotAeZK1ieNaAMnoyfyVzSSJtKsaa6q5PvSJaENzlrqfaEePZC/QtoHRWO pYpdcAvsITSNidw5l9waM2rBsjNDTwY0MYMKSPBbO+37sqsExjxnA2rCEu6EE+0Z4GVg16 Y3REEM6YvtgER94hDol24LHxMtxN9Ow= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-512-dZAI30q9PRKOvWTgzcfh4g-1; Fri, 17 Mar 2023 11:15:30 -0400 X-MC-Unique: dZAI30q9PRKOvWTgzcfh4g-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0602810146E3; Fri, 17 Mar 2023 15:15:30 +0000 (UTC) Received: from llong.com (unknown [10.22.10.238]) by smtp.corp.redhat.com (Postfix) with ESMTP id 83C49492B00; Fri, 17 Mar 2023 15:15:29 +0000 (UTC) From: Waiman Long To: Tejun Heo , Zefan Li , Johannes Weiner , Shuah Khan Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Will Deacon , Peter Zijlstra , =?utf-8?q?Michal_Koutn=C3=BD?= , Juri Lelli , Waiman Long Subject: [PATCH v2 1/4] cgroup/cpuset: Fix partition root's cpuset.cpus update bug Date: Fri, 17 Mar 2023 11:15:05 -0400 Message-Id: <20230317151508.1225282-2-longman@redhat.com> In-Reply-To: <20230317151508.1225282-1-longman@redhat.com> References: <20230317151508.1225282-1-longman@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org It was found that commit 7a2127e66a00 ("cpuset: Call set_cpus_allowed_ptr() with appropriate mask for task") introduced a bug that corrupted "cpuset.cpus" of a partition root when it was updated. It is because the tmp->new_cpus field of the passed tmp parameter of update_parent_subparts_cpumask() should not be used at all as it contains important cpumask data that should not be overwritten. Fix it by using tmp->addmask instead. Also update update_cpumask() to make sure that trialcs->cpu_allowed will not be corrupted until it is no longer needed. Fixes: 7a2127e66a00 ("cpuset: Call set_cpus_allowed_ptr() with appropriate mask for task") Signed-off-by: Waiman Long --- kernel/cgroup/cpuset.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 636f1c682ac0..f310915d1257 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1513,7 +1513,7 @@ static int update_parent_subparts_cpumask(struct cpuset *cs, int cmd, spin_unlock_irq(&callback_lock); if (adding || deleting) - update_tasks_cpumask(parent, tmp->new_cpus); + update_tasks_cpumask(parent, tmp->addmask); /* * Set or clear CS_SCHED_LOAD_BALANCE when partcmd_update, if necessary. @@ -1770,10 +1770,13 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs, /* * Use the cpumasks in trialcs for tmpmasks when they are pointers * to allocated cpumasks. + * + * Note that update_parent_subparts_cpumask() uses only addmask & + * delmask, but not new_cpus. */ tmp.addmask = trialcs->subparts_cpus; tmp.delmask = trialcs->effective_cpus; - tmp.new_cpus = trialcs->cpus_allowed; + tmp.new_cpus = NULL; #endif retval = validate_change(cs, trialcs); @@ -1838,6 +1841,11 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs, } spin_unlock_irq(&callback_lock); +#ifdef CONFIG_CPUMASK_OFFSTACK + /* Now trialcs->cpus_allowed is available */ + tmp.new_cpus = trialcs->cpus_allowed; +#endif + /* effective_cpus will be updated here */ update_cpumasks_hier(cs, &tmp, false); From patchwork Fri Mar 17 15:15:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Waiman Long X-Patchwork-Id: 13179203 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE2FAC74A5B for ; Fri, 17 Mar 2023 15:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230177AbjCQPRb (ORCPT ); Fri, 17 Mar 2023 11:17:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44100 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231367AbjCQPRS (ORCPT ); Fri, 17 Mar 2023 11:17:18 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AAE036A1D1 for ; Fri, 17 Mar 2023 08:15:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1679066135; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=amVdrpHTvDqA9NrS62Whbl25Xahg4lsNNZAsfD0/8D0=; b=BUDU3m7DKG88JRA1whDcemj0RFaT+VLMYzrEI37zwHDo/5aqxmFcxYsAIX5DmR+HaA4e7p vpcpg5vU00LbjiLLNwWIHVyhxf0+pAPnSod/h5KvZWijC391TIGCvc/pmER4uoOaQqAnIv ZHqHv8CAIjHBrWVsMFWBcxau0h4bw9Q= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-20-dusQyZqEPyawIzgUhzWxMA-1; Fri, 17 Mar 2023 11:15:31 -0400 X-MC-Unique: dusQyZqEPyawIzgUhzWxMA-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 864BC3801EC6; Fri, 17 Mar 2023 15:15:30 +0000 (UTC) Received: from llong.com (unknown [10.22.10.238]) by smtp.corp.redhat.com (Postfix) with ESMTP id 12253492B00; Fri, 17 Mar 2023 15:15:30 +0000 (UTC) From: Waiman Long To: Tejun Heo , Zefan Li , Johannes Weiner , Shuah Khan Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Will Deacon , Peter Zijlstra , =?utf-8?q?Michal_Koutn=C3=BD?= , Juri Lelli , Waiman Long Subject: [PATCH v2 2/4] cgroup/cpuset: Skip task update if hotplug doesn't affect current cpuset Date: Fri, 17 Mar 2023 11:15:06 -0400 Message-Id: <20230317151508.1225282-3-longman@redhat.com> In-Reply-To: <20230317151508.1225282-1-longman@redhat.com> References: <20230317151508.1225282-1-longman@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org If a hotplug event doesn't affect the current cpuset, there is no point to call hotplug_update_tasks() or hotplug_update_tasks_legacy(). So just skip it. Signed-off-by: Waiman Long Reviewed-by: Michal Koutný --- kernel/cgroup/cpuset.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index f310915d1257..5b8d763555b0 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -3516,6 +3516,8 @@ static void cpuset_hotplug_update_tasks(struct cpuset *cs, struct tmpmasks *tmp) update_tasks: cpus_updated = !cpumask_equal(&new_cpus, cs->effective_cpus); mems_updated = !nodes_equal(new_mems, cs->effective_mems); + if (!cpus_updated && !mems_updated) + goto unlock; /* Hotplug doesn't affect this cpuset */ if (mems_updated) check_insane_mems_config(&new_mems); @@ -3527,6 +3529,7 @@ static void cpuset_hotplug_update_tasks(struct cpuset *cs, struct tmpmasks *tmp) hotplug_update_tasks_legacy(cs, &new_cpus, &new_mems, cpus_updated, mems_updated); +unlock: percpu_up_write(&cpuset_rwsem); } From patchwork Fri Mar 17 15:15:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Waiman Long X-Patchwork-Id: 13179202 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32674C74A5B for ; Fri, 17 Mar 2023 15:16:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231697AbjCQPQw (ORCPT ); Fri, 17 Mar 2023 11:16:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231752AbjCQPQn (ORCPT ); Fri, 17 Mar 2023 11:16:43 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CCD2F6B5C6 for ; Fri, 17 Mar 2023 08:15:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1679066135; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xGXOF5DEcP6pwvx1eYY/0gGWQNDYbTOSJx5veuAvjus=; b=c1RRVw1pITr3l1jTRSK/jsvuWpTOtgk78Ei7Ggt0lzo9rvbZ+bHGoU94KcG+l8hIjP1/9M VyHwL6idgAvk4rKkvq/ZZPmeEhOHe6VJYFPWc/rnvQG9tqJTfEv/0DtaRqW65MMWMEaB1n y7h+xx8UOmsY02tg8Fctl17S25apBM0= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-269-KPwhbz6AN9y_PYfmsIre9w-1; Fri, 17 Mar 2023 11:15:31 -0400 X-MC-Unique: KPwhbz6AN9y_PYfmsIre9w-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 12C7E3C10246; Fri, 17 Mar 2023 15:15:31 +0000 (UTC) Received: from llong.com (unknown [10.22.10.238]) by smtp.corp.redhat.com (Postfix) with ESMTP id 924D6492B00; Fri, 17 Mar 2023 15:15:30 +0000 (UTC) From: Waiman Long To: Tejun Heo , Zefan Li , Johannes Weiner , Shuah Khan Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Will Deacon , Peter Zijlstra , =?utf-8?q?Michal_Koutn=C3=BD?= , Juri Lelli , Waiman Long Subject: [PATCH v2 3/4] cgroup/cpuset: Include offline CPUs when tasks' cpumasks in top_cpuset are updated Date: Fri, 17 Mar 2023 11:15:07 -0400 Message-Id: <20230317151508.1225282-4-longman@redhat.com> In-Reply-To: <20230317151508.1225282-1-longman@redhat.com> References: <20230317151508.1225282-1-longman@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Similar to commit 3fb906e7fabb ("group/cpuset: Don't filter offline CPUs in cpuset_cpus_allowed() for top cpuset tasks"), the whole set of possible CPUs including offline ones should be used for setting cpumasks for tasks in the top cpuset when a cpuset partition is modified as the hotplug code won't update cpumasks for tasks in the top cpuset when CPUs become online or offline. Signed-off-by: Waiman Long --- kernel/cgroup/cpuset.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 5b8d763555b0..db8793a2082f 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1209,7 +1209,9 @@ void rebuild_sched_domains(void) * * Iterate through each task of @cs updating its cpus_allowed to the * effective cpuset's. As this function is called with cpuset_rwsem held, - * cpuset membership stays stable. + * cpuset membership stays stable. For top_cpuset, task_cpu_possible_mask() + * is used instead of effective_cpus to make sure all offline CPUs are also + * included as hotplug code won't update cpumasks for tasks in top_cpuset. */ static void update_tasks_cpumask(struct cpuset *cs, struct cpumask *new_cpus) { @@ -1219,15 +1221,18 @@ static void update_tasks_cpumask(struct cpuset *cs, struct cpumask *new_cpus) css_task_iter_start(&cs->css, 0, &it); while ((task = css_task_iter_next(&it))) { - /* - * Percpu kthreads in top_cpuset are ignored - */ - if (top_cs && (task->flags & PF_KTHREAD) && - kthread_is_per_cpu(task)) - continue; + const struct cpumask *possible_mask = task_cpu_possible_mask(task); - cpumask_and(new_cpus, cs->effective_cpus, - task_cpu_possible_mask(task)); + if (top_cs) { + /* + * Percpu kthreads in top_cpuset are ignored + */ + if ((task->flags & PF_KTHREAD) && kthread_is_per_cpu(task)) + continue; + cpumask_andnot(new_cpus, possible_mask, cs->subparts_cpus); + } else { + cpumask_and(new_cpus, possible_mask, cs->effective_cpus); + } set_cpus_allowed_ptr(task, new_cpus); } css_task_iter_end(&it); From patchwork Fri Mar 17 15:15:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Waiman Long X-Patchwork-Id: 13179200 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3EECDC6FD1D for ; Fri, 17 Mar 2023 15:16:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231789AbjCQPQv (ORCPT ); Fri, 17 Mar 2023 11:16:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229863AbjCQPQl (ORCPT ); Fri, 17 Mar 2023 11:16:41 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3074831BD0 for ; Fri, 17 Mar 2023 08:15:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1679066135; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XQ/fbLiMTxYvcy4Xv+isuWXHLsrugKjziame8MLcKpQ=; b=EE30zdnXa4imFeCY54+AIDEPKPIha2s7E5PtIY15p+72PIByifqRo3MABdXSU24TnYaUQn TalxLnA3JDX/f0jtecWlpS4lyu2wDjuod1C/DsvuuDYH2wgTv1q2vH1ZQLhImxe6PFfHQa COR871feI6Bp+G77WCymWdt20CfL2UQ= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-345-60e1ciYHONuf3FhLRFxLKQ-1; Fri, 17 Mar 2023 11:15:32 -0400 X-MC-Unique: 60e1ciYHONuf3FhLRFxLKQ-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9816C29AA2DD; Fri, 17 Mar 2023 15:15:31 +0000 (UTC) Received: from llong.com (unknown [10.22.10.238]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20780492B00; Fri, 17 Mar 2023 15:15:31 +0000 (UTC) From: Waiman Long To: Tejun Heo , Zefan Li , Johannes Weiner , Shuah Khan Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Will Deacon , Peter Zijlstra , =?utf-8?q?Michal_Koutn=C3=BD?= , Juri Lelli , Waiman Long Subject: [PATCH v2 4/4] cgroup/cpuset: Minor updates to test_cpuset_prs.sh Date: Fri, 17 Mar 2023 11:15:08 -0400 Message-Id: <20230317151508.1225282-5-longman@redhat.com> In-Reply-To: <20230317151508.1225282-1-longman@redhat.com> References: <20230317151508.1225282-1-longman@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This patch makes the following minor updates to the cpuset partition testing script test_cpuset_prs.sh. - Remove online_cpus function call as it will be called anyway on exit in cleanup. - Make the enabling of sched/verbose debugfs flag conditional on the "-v" verbose option and set DELAY_FACTOR to 2 in this case as cpuset partition operations are likely to be slowed down by enabling that. Signed-off-by: Waiman Long --- .../selftests/cgroup/test_cpuset_prs.sh | 25 +++++++++++-------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/tools/testing/selftests/cgroup/test_cpuset_prs.sh b/tools/testing/selftests/cgroup/test_cpuset_prs.sh index 75c100de90ff..2b5215cc599f 100755 --- a/tools/testing/selftests/cgroup/test_cpuset_prs.sh +++ b/tools/testing/selftests/cgroup/test_cpuset_prs.sh @@ -15,13 +15,6 @@ skip_test() { [[ $(id -u) -eq 0 ]] || skip_test "Test must be run as root!" -# Set sched verbose flag, if available -if [[ -d /sys/kernel/debug/sched ]] -then - # Used to restore the original setting during cleanup - SCHED_DEBUG=$(cat /sys/kernel/debug/sched/verbose) - echo Y > /sys/kernel/debug/sched/verbose -fi # Get wait_inotify location WAIT_INOTIFY=$(cd $(dirname $0); pwd)/wait_inotify @@ -37,10 +30,14 @@ CPUS=$(lscpu | grep "^CPU(s):" | sed -e "s/.*:[[:space:]]*//") PROG=$1 VERBOSE= DELAY_FACTOR=1 +SCHED_DEBUG= while [[ "$1" = -* ]] do case "$1" in -v) VERBOSE=1 + # Enable sched/verbose can slow thing down + [[ $DELAY_FACTOR -eq 1 ]] && + DELAY_FACTOR=2 break ;; -d) DELAY_FACTOR=$2 @@ -54,6 +51,14 @@ do shift done +# Set sched verbose flag if available when "-v" option is specified +if [[ -n "$VERBOSE" && -d /sys/kernel/debug/sched ]] +then + # Used to restore the original setting during cleanup + SCHED_DEBUG=$(cat /sys/kernel/debug/sched/verbose) + echo Y > /sys/kernel/debug/sched/verbose +fi + cd $CGROUP2 echo +cpuset > cgroup.subtree_control [[ -d test ]] || mkdir test @@ -65,7 +70,8 @@ cleanup() rmdir A1/A2/A3 A1/A2 A1 B1 > /dev/null 2>&1 cd .. rmdir test > /dev/null 2>&1 - echo "$SCHED_DEBUG" > /sys/kernel/debug/sched/verbose + [[ -n "$SCHED_DEBUG" ]] && + echo "$SCHED_DEBUG" > /sys/kernel/debug/sched/verbose } # Pause in ms @@ -571,7 +577,6 @@ run_state_test() echo "Test $TEST[$I] failed result check!" eval echo \"\${$TEST[$I]}\" dump_states - online_cpus exit 1 } @@ -582,7 +587,6 @@ run_state_test() eval echo \"\${$TEST[$I]}\" echo dump_states - online_cpus exit 1 } } @@ -594,7 +598,6 @@ run_state_test() eval echo \"\${$TEST[$I]}\" echo dump_states - online_cpus exit 1 } }