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=-11.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 80A11C433DF for ; Mon, 1 Jun 2020 09:52:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5BAFE2074B for ; Mon, 1 Jun 2020 09:52:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726265AbgFAJwc (ORCPT ); Mon, 1 Jun 2020 05:52:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726075AbgFAJwY (ORCPT ); Mon, 1 Jun 2020 05:52:24 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9E00FC08C5C9; Mon, 1 Jun 2020 02:52:24 -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 1jfh7F-0003fW-7h; Mon, 01 Jun 2020 11:52:21 +0200 Received: from [127.0.1.1] (localhost [IPv6:::1]) by tip-bot2.lab.linutronix.de (Postfix) with ESMTP id D3C821C0244; Mon, 1 Jun 2020 11:52:20 +0200 (CEST) Date: Mon, 01 Jun 2020 09:52:20 -0000 From: "tip-bot2 for Peter Zijlstra" Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] smp: Move irq_work_run() out of flush_smp_call_function_queue() Cc: "Peter Zijlstra (Intel)" , Ingo Molnar , x86 , LKML In-Reply-To: <20200526161907.895109676@infradead.org> References: <20200526161907.895109676@infradead.org> MIME-Version: 1.0 Message-ID: <159100514066.17951.11705563695792334781.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: afaa653c564da38c0b34c4baba31e88c46a8764c Gitweb: https://git.kernel.org/tip/afaa653c564da38c0b34c4baba31e88c46a8764c Author: Peter Zijlstra AuthorDate: Tue, 26 May 2020 18:11:00 +02:00 Committer: Ingo Molnar CommitterDate: Thu, 28 May 2020 10:54:15 +02:00 smp: Move irq_work_run() out of flush_smp_call_function_queue() This ensures flush_smp_call_function_queue() is strictly about call_single_queue. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20200526161907.895109676@infradead.org --- kernel/smp.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/kernel/smp.c b/kernel/smp.c index db2f738..f720e38 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -84,6 +84,7 @@ int smpcfd_dying_cpu(unsigned int cpu) * still pending. */ flush_smp_call_function_queue(false); + irq_work_run(); return 0; } @@ -191,6 +192,14 @@ static int generic_exec_single(int cpu, call_single_data_t *csd, void generic_smp_call_function_single_interrupt(void) { flush_smp_call_function_queue(true); + + /* + * Handle irq works queued remotely by irq_work_queue_on(). + * Smp functions above are typically synchronous so they + * better run first since some other CPUs may be busy waiting + * for them. + */ + irq_work_run(); } /** @@ -267,14 +276,6 @@ static void flush_smp_call_function_queue(bool warn_cpu_offline) csd_unlock(csd); func(info); } - - /* - * Handle irq works queued remotely by irq_work_queue_on(). - * Smp functions above are typically synchronous so they - * better run first since some other CPUs may be busy waiting - * for them. - */ - irq_work_run(); } /*