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=-14.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 4898DC388F9 for ; Wed, 11 Nov 2020 08:24:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3F13206E3 for ; Wed, 11 Nov 2020 08:24:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="WzpcM8uu"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Kr9odGZ5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725920AbgKKIYN (ORCPT ); Wed, 11 Nov 2020 03:24:13 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:36242 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726318AbgKKIXY (ORCPT ); Wed, 11 Nov 2020 03:23:24 -0500 Date: Wed, 11 Nov 2020 08:23:22 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1605083003; h=from:from:sender:sender:reply-to: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=wFhnxBQxV2YYlDmoo+KkM2aehgRnBwF0654L/61Bpmc=; b=WzpcM8uuMu1Zh3G0E3fy+mQGVfql6/bg+LwP97zwaCt1XqP0eoOLZcrr5MI6Pp8OFun5Fd 4zqATz+USgSWndfsvTQcb+sCptjndOCgaTzF3Be3SFItP3/JplWRMzroD9jVYpPFfCwRnk 5x0oRlrjBeTs5rmklcrFopB9tSnutLfZCQkGrZKls4vbKqrUFmA9FRxsX29+t5KEqXWZJl 6KUkI0V/hPTpl8/YZVoAZenL4CXffOPaplLOroCuctpeAnMqhmhRiJyUhFnjsRxU4uDWAz hZ0410MlvaHMVFxb4oPhThs9HXfKTSC0P86qD6MX/2cOv172Qquhw/7W1g5C8A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1605083003; h=from:from:sender:sender:reply-to: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=wFhnxBQxV2YYlDmoo+KkM2aehgRnBwF0654L/61Bpmc=; b=Kr9odGZ5wpoMijMXrYk1G1aEOLSLNRNUAfPofkAo45vdPkfT6vnwTtvie9hOFeySEOYcAX MXuA0ntcxINwjdDQ== From: "tip-bot2 for Peter Zijlstra" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] workqueue: Manually break affinity on hotplug Cc: "Peter Zijlstra (Intel)" , Valentin Schneider , Tejun Heo , Daniel Bristot de Oliveira , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20201023102346.464718669@infradead.org> References: <20201023102346.464718669@infradead.org> MIME-Version: 1.0 Message-ID: <160508300227.11244.8988819805269225901.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit 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: 06249738a41a70f2201a148866899f84cbebc45e Gitweb: https://git.kernel.org/tip/06249738a41a70f2201a148866899f84cbebc45e Author: Peter Zijlstra AuthorDate: Fri, 25 Sep 2020 15:45:11 +02:00 Committer: Peter Zijlstra CommitterDate: Tue, 10 Nov 2020 18:38:58 +01:00 workqueue: Manually break affinity on hotplug Don't rely on the scheduler to force break affinity for us -- it will stop doing that for per-cpu-kthreads. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Valentin Schneider Acked-by: Tejun Heo Reviewed-by: Daniel Bristot de Oliveira Link: https://lkml.kernel.org/r/20201023102346.464718669@infradead.org --- kernel/workqueue.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 437935e..c71da2a 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -4908,6 +4908,10 @@ static void unbind_workers(int cpu) pool->flags |= POOL_DISASSOCIATED; raw_spin_unlock_irq(&pool->lock); + + for_each_pool_worker(worker, pool) + WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, cpu_active_mask) < 0); + mutex_unlock(&wq_pool_attach_mutex); /*