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 DF48BC433EF for ; Wed, 6 Jul 2022 10:22:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232483AbiGFKWF (ORCPT ); Wed, 6 Jul 2022 06:22:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231935AbiGFKVj (ORCPT ); Wed, 6 Jul 2022 06:21:39 -0400 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A55D2714D; Wed, 6 Jul 2022 03:21:15 -0700 (PDT) Received: by mail-pl1-x631.google.com with SMTP id m14so13286771plg.5; Wed, 06 Jul 2022 03:21:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=UzsK5A/Pd2DS/q+pu2TPIXsF74uXoZ2jR8FiWqOBTf0=; b=jPknnkWS+HyznwuLvLZ32EFNaMi2kYHUveXX06LBsxWi8WWk54fdGGslOYuaNSzAC1 +C/+81V/BTWAnyuW8zpzEOQ+3m5kTKePsPyILyW85ZxloaLy8smIa1RrjtcLHK+50AnN yH5/1g7GUFT38DXkivHkyB65dBQ5OBuhhzy8EUzkCEJTf3ZiONObArhVTtB/OcViMTCO X8KJZBJU4Y7DZ7cizzptUG1IJyL3aKSnpY0xM5e5mg68r1rnl3nGzJWE9g1ZeO/yvMHJ 7jvS9E7520rHkopiOmyafXJGnjCstN3kCYMy2ZH1/+Y8EfKqhyAZCsV/fFXXHCJrvG+e ygDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=UzsK5A/Pd2DS/q+pu2TPIXsF74uXoZ2jR8FiWqOBTf0=; b=w2Y6SpmJBMIP8pXWlIVkOuLu0pbSMIpNPyIM57uEV3EpEgf4KrkJWXTBPF1fkEzlzk 3fjU0rN2xN/hQyIl3nVIbu/4f35SanMyY5MH5PLpgvUCGC4IknXEB1H71B7jei9iEN1C Nh07tWJCVfBAaI0AJh8yJ1TOAfLiVvfItTSP35E/c+yX9ijfmK1nOkqw6FEhft2onbP5 GtujuryDzNnKM3yhd8BWxEg4gUPoavz2sVhbsdgpLp7Y2eJSPUx58xjPKQEuqg63244C g8JYmAt/zwanWcDzlhPT9lj/X8GSQ98Q/3N8u2u+YxNGjVipJvdTCvISXwz1VlbcWV33 dFOg== X-Gm-Message-State: AJIora9HhR2u8Q3E16508TwNPd967xYkTau5ZDOBObafM29Dcav9ET0f J7u/ZP2RySDr7b4/ze+q/PM= X-Google-Smtp-Source: AGRyM1u62ff8Zjp/L+wMPt2MQjdQjkuAxTYu9AnfGkSn1v7kxGjrvXqT5UyLr/SkNP7QrlRhVQcR8g== X-Received: by 2002:a17:90a:c7cc:b0:1ef:775e:8df1 with SMTP id gf12-20020a17090ac7cc00b001ef775e8df1mr26574178pjb.28.1657102874543; Wed, 06 Jul 2022 03:21:14 -0700 (PDT) Received: from ?IPV6:2404:f801:0:5:8000::75b? ([2404:f801:9000:1a:efea::75b]) by smtp.gmail.com with ESMTPSA id w21-20020a656955000000b0041282c423e6sm2085990pgq.71.2022.07.06.03.21.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 06 Jul 2022 03:21:13 -0700 (PDT) Message-ID: <71242da1-8a7a-53ca-06d6-7a1363141bd8@gmail.com> Date: Wed, 6 Jul 2022 18:21:02 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH 2/2] x86/ACPI: Set swiotlb area according to the number of lapic entry in MADT Content-Language: en-US To: Christoph Hellwig Cc: corbet@lwn.net, rafael@kernel.org, len.brown@intel.com, pavel@ucw.cz, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, m.szyprowski@samsung.com, robin.murphy@arm.com, paulmck@kernel.org, akpm@linux-foundation.org, keescook@chromium.org, songmuchun@bytedance.com, rdunlap@infradead.org, damien.lemoal@opensource.wdc.com, michael.h.kelley@microsoft.com, kys@microsoft.com, Tianyu Lan , iommu@lists.linux-foundation.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, vkuznets@redhat.com, wei.liu@kernel.org, parri.andrea@gmail.com, thomas.lendacky@amd.com, linux-hyperv@vger.kernel.org, kirill.shutemov@intel.com, andi.kleen@intel.com, Andi Kleen References: <20220627153150.106995-1-ltykernel@gmail.com> <20220627153150.106995-3-ltykernel@gmail.com> <10062b7d-f0a6-6724-4ccb-506da09a8533@gmail.com> From: Tianyu Lan In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/6/2022 5:02 PM, Christoph Hellwig wrote: > On Wed, Jul 06, 2022 at 04:57:33PM +0800, Tianyu Lan wrote: >> Swiotlb_init() is called in the mem_init() of different architects and >> memblock free pages are released to the buddy allocator just after >> calling swiotlb_init() via memblock_free_all(). > > Yes. > >> The mem_init() is called before smp_init(). > > But why would that matter? cpu_possible_map is set up from > setup_arch(), which is called before that. Sorry. I just still focus online cpu number and the number is got after smp_init(). Possible cpu number includes some offline cpus. I will have a try. Thanks for suggestion.