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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C974C77B70 for ; Mon, 17 Apr 2023 12:02:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229568AbjDQMCN (ORCPT ); Mon, 17 Apr 2023 08:02:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49202 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230092AbjDQMCK (ORCPT ); Mon, 17 Apr 2023 08:02:10 -0400 Received: from mx3.molgen.mpg.de (mx3.molgen.mpg.de [141.14.17.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA099BB; Mon, 17 Apr 2023 05:01:25 -0700 (PDT) Received: from [141.14.220.45] (g45.guest.molgen.mpg.de [141.14.220.45]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id C7E5061CC40F9; Mon, 17 Apr 2023 13:24:36 +0200 (CEST) Message-ID: Date: Mon, 17 Apr 2023 13:24:36 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Subject: Re: [patch 00/37] cpu/hotplug, x86: Reworked parallel CPU bringup Content-Language: en-US From: Paul Menzel To: Thomas Gleixner Cc: linux-kernel@vger.kernel.org, x86@kernel.org, David Woodhouse , Andrew Cooper , Brian Gerst , Arjan van de Veen , Paolo Bonzini , Paul McKenney , Tom Lendacky , Sean Christopherson , Oleksandr Natalenko , "Guilherme G. Piccoli" , Piotr Gorski , David Woodhouse , Usama Arif , =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= , Boris Ostrovsky , xen-devel@lists.xenproject.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , Guo Ren , linux-csky@vger.kernel.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, "James E. J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan References: <20230414225551.858160935@linutronix.de> <8247ce4d-15b7-03b2-0c9b-74f8cd6cad50@molgen.mpg.de> In-Reply-To: <8247ce4d-15b7-03b2-0c9b-74f8cd6cad50@molgen.mpg.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org [Correct David’s address] Am 17.04.23 um 13:19 schrieb Paul Menzel: > Dear Thomas, > > > Am 15.04.23 um 01:44 schrieb Thomas Gleixner: > >> This is a complete rework of the parallel bringup patch series (V17) >> >> >> https://lore.kernel.org/lkml/20230328195758.1049469-1-usama.arif@bytedance.com >> >> to address the issues which were discovered in review: > > […] > > Thank you very much for your rework. > > I tested this on the ASUS F2A85-M PRO, and get a delay of ten seconds. > > ``` > […] > [    0.258193] smpboot: CPU0: AMD A6-6400K APU with Radeon(tm) HD > Graphics (family: 0x15, model: 0x13, stepping: 0x1) > […] > [    0.259329] smp: Bringing up secondary CPUs ... > [    0.259527] x86: Booting SMP configuration: > [    0.259528] .... node  #0, CPUs:      #1 > [    0.261007] After schedule_preempt_disabled > [   10.260990] CPU1 failed to report alive state > [   10.261070] smp: Brought up 1 node, 1 CPU > [   10.261073] smpboot: Max logical packages: 2 > [   10.261074] smpboot: Total of 1 processors activated (7800.54 BogoMIPS) > [   10.261601] devtmpfs: initialized > [   10.261697] x86/mm: Memory block size: 128MB > ``` > > This delay has been there with v6.3-rc6-46-gde4664485abbc and some > custom (printk) patches on top and merging dwmw2/parallel-6.2-rc3-v16 > into it. I only tested this. I think dwmw2/parallel-6.2-v17 failed to > build for me, when trying to merge it into Linus’ master version at that > time. I didn’t come around to report it, and you posted your rework, so > I am replying here. > > I am going to try your branch directly in the next days, but just wanted > to report back already. > > > Kind regards, > > Paul