From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F253C433E0 for ; Tue, 16 Jun 2020 12:23:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B04E20FC3 for ; Tue, 16 Jun 2020 12:23:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728795AbgFPMXr (ORCPT ); Tue, 16 Jun 2020 08:23:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42714 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728909AbgFPMWF (ORCPT ); Tue, 16 Jun 2020 08:22:05 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1EA3AC08C5C5; Tue, 16 Jun 2020 05:22:04 -0700 (PDT) Received: from [5.158.153.53] (helo=tip-bot2.lab.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1jlAbJ-0004iW-8a; Tue, 16 Jun 2020 14:22:01 +0200 Received: from [127.0.1.1] (localhost [IPv6:::1]) by tip-bot2.lab.linutronix.de (Postfix) with ESMTP id 13F5C1C06FE; Tue, 16 Jun 2020 14:21:54 +0200 (CEST) Date: Tue, 16 Jun 2020 12:21:53 -0000 From: "tip-bot2 for Marcelo Tosatti" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] kthread: Switch to cpu_possible_mask Cc: Frederic Weisbecker , Marcelo Tosatti , "Peter Zijlstra (Intel)" , x86 , LKML In-Reply-To: <20200527142909.23372-2-frederic@kernel.org> References: <20200527142909.23372-2-frederic@kernel.org> MIME-Version: 1.0 Message-ID: <159231011385.16989.15305912016989181408.tip-bot2@tip-bot2> X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the sched/core branch of tip: Commit-ID: 043eb8e1051143a24811e6f35c276e35ae8247b6 Gitweb: https://git.kernel.org/tip/043eb8e1051143a24811e6f35c276e35ae8247b6 Author: Marcelo Tosatti AuthorDate: Wed, 27 May 2020 16:29:08 +02:00 Committer: Peter Zijlstra CommitterDate: Mon, 15 Jun 2020 14:10:03 +02:00 kthread: Switch to cpu_possible_mask Next patch will switch unbound kernel threads mask to housekeeping_cpumask(), a subset of cpu_possible_mask. So in order to ease bisection, lets first switch kthreads default affinity from cpu_all_mask to cpu_possible_mask. It looks safe to do so as cpu_possible_mask seem to be initialized at setup_arch() time, way before kthreadd is created. Suggested-by: Frederic Weisbecker Signed-off-by: Frederic Weisbecker Signed-off-by: Marcelo Tosatti Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20200527142909.23372-2-frederic@kernel.org --- kernel/kthread.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/kthread.c b/kernel/kthread.c index 8e3d2d7..b86d37c 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -383,7 +383,7 @@ struct task_struct *__kthread_create_on_node(int (*threadfn)(void *data), * The kernel thread should not inherit these properties. */ sched_setscheduler_nocheck(task, SCHED_NORMAL, ¶m); - set_cpus_allowed_ptr(task, cpu_all_mask); + set_cpus_allowed_ptr(task, cpu_possible_mask); } kfree(create); return task; @@ -608,7 +608,7 @@ int kthreadd(void *unused) /* Setup a clean context for our children to inherit. */ set_task_comm(tsk, "kthreadd"); ignore_signals(tsk); - set_cpus_allowed_ptr(tsk, cpu_all_mask); + set_cpus_allowed_ptr(tsk, cpu_possible_mask); set_mems_allowed(node_states[N_MEMORY]); current->flags |= PF_NOFREEZE;