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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 6BD45C432C0 for ; Wed, 27 Nov 2019 19:37:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3199020863 for ; Wed, 27 Nov 2019 19:37:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="Wf5h3r66" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3199020863 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lca.pw Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A6AFD6B04E1; Wed, 27 Nov 2019 14:37:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A1C056B04E4; Wed, 27 Nov 2019 14:37:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 90ACD6B04E5; Wed, 27 Nov 2019 14:37:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0234.hostedemail.com [216.40.44.234]) by kanga.kvack.org (Postfix) with ESMTP id 7BCD66B04E1 for ; Wed, 27 Nov 2019 14:37:12 -0500 (EST) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 121A14DD5 for ; Wed, 27 Nov 2019 19:37:12 +0000 (UTC) X-FDA: 76203065904.25.army65_3ec9f95a70722 X-HE-Tag: army65_3ec9f95a70722 X-Filterd-Recvd-Size: 3394 Received: from mail-qt1-f193.google.com (mail-qt1-f193.google.com [209.85.160.193]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Wed, 27 Nov 2019 19:37:11 +0000 (UTC) Received: by mail-qt1-f193.google.com with SMTP id q8so23876203qtr.10 for ; Wed, 27 Nov 2019 11:37:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=o0zrvyMBRXYkoG1uZ9FuMgX8jM9nuRXtxw/a+cZ+hwQ=; b=Wf5h3r664CU1Lu3IcZIgTny0LBq5BgU54bDVwuXTpS6CtF6pRmgYKM1qnNOLXUFMQF PUtiDgN9cDJCE3oUHDQ3PGaWtynOJ3qMrzYUe5kBNWikeiA2bFzyigp7JIy0mdWUKjyG 0lj7KO3Cq1+nbnzUv2MVJEziVx+NHYU6PUuDNezHJOrm/vd3H2o7yB4QGrmphxfqeAVf 7Mzn3Hr6apHI/WFXcRgI5tuNPOa12080jjJpkV3Gyk+DkHHRZO2wsu+6gHBX4wqRVATk EDg7GhKoy6Sn1u1o83eaPzvM0X2O8ohJ93CEWJjw9t55DoVYUL4fFHHLdkRoAtC3De9Z Uayg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=o0zrvyMBRXYkoG1uZ9FuMgX8jM9nuRXtxw/a+cZ+hwQ=; b=YGa/ySS/QCW68k/cZ4NHVcOKJjVJ/2w1UwEK1mQSqZ530P54dy4s+PzFCLaggbU6Cm dpTO97ix8enXkaG5o9ImcduHh640hWvNr7+ESP0CaVC5T+1bNPakNUvN3x3ydTSsaYuj d9medLDXmOkZUD+SRr5B7POYJ6V48f9kuKYKqRcbrKRb8DLeW0UMfe3TILwZOSYPDhoC qmSz1JE5SihSgX2b98nN69tccXZYL8tYb0RGJod2SiEJvTZo8aHtpR/2x3hKTCGzQ0mP 169BNyo2p7VJBXjPyw81P9f5h8zm/CELCiweK25sMiKDlCU3DKdCMOGWO/b6OhE4NMFr oXZg== X-Gm-Message-State: APjAAAUpOjRKOd0r/t/Qa1pzZGc/KtmnhrKHPE8BnywBzMIrwQ2fnp27 EZoVPdoxRRcD63ul+JI+uAELQ6O95ZCwSQ== X-Google-Smtp-Source: APXvYqxGlPV+4tr2yZvZ8TnVOLOXHwvOWaWGqj044iJNZi51DnFtdbCi51oPe/3NvHuinWxS/WbuXQ== X-Received: by 2002:ac8:2a1d:: with SMTP id k29mr43170806qtk.336.1574883430580; Wed, 27 Nov 2019 11:37:10 -0800 (PST) Received: from [192.168.1.183] (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id g7sm7291726qkl.20.2019.11.27.11.37.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 27 Nov 2019 11:37:09 -0800 (PST) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH v1] mm/memory_hotplug: don't check the nid in find_(smallest|biggest)_section_pfn Date: Wed, 27 Nov 2019 14:37:09 -0500 Message-Id: References: <1F8C5EE3-4F07-4B23-9612-25FA265557C5@redhat.com> Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Michal Hocko , Oscar Salvador In-Reply-To: <1F8C5EE3-4F07-4B23-9612-25FA265557C5@redhat.com> To: David Hildenbrand X-Mailer: iPhone Mail (17A878) X-Bogosity: Ham, tests=bogofilter, spamicity=0.181782, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > On Nov 27, 2019, at 2:06 PM, David Hildenbrand wrote: >=20 > The zone pointer is unique for every node. (in contrast to the zone index)= . I am not sure if it is worth optimizing there. The existing nid check looks q= uite straight-forward and cheap.=