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=-2.5 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT 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 DF706C43381 for ; Mon, 25 Feb 2019 16:04:03 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A217620842 for ; Mon, 25 Feb 2019 16:04:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A217620842 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3A21A8E000F; Mon, 25 Feb 2019 11:04:03 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 327D48E000D; Mon, 25 Feb 2019 11:04:03 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1C9F08E000F; Mon, 25 Feb 2019 11:04:03 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-ed1-f71.google.com (mail-ed1-f71.google.com [209.85.208.71]) by kanga.kvack.org (Postfix) with ESMTP id B48AC8E000D for ; Mon, 25 Feb 2019 11:04:02 -0500 (EST) Received: by mail-ed1-f71.google.com with SMTP id m25so265491edd.6 for ; Mon, 25 Feb 2019 08:04:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:date:from:to :cc:subject:message-id:references:mime-version:content-disposition :in-reply-to:user-agent; bh=PNfhIfgwn33iwuw0DDDVaGD8aew2O6QdLi3sHg5XfjY=; b=eU1RZks+M6CDdG9o+1w+S+QlLadWqweUgGZtywVTT+9ATD9vnXbI1ypCUsJToXw9M4 dpeIXGMtgETVdoS87V/5jjJOOQK0ejcwr1CUy2kSgtamdFNY9NZDNhoakVW5EVSrf1xn +dfqoZ18/UlNH9g8mtXnJfy6BSJkjDPsF1AfsSAIqNyrus3wLTFn7N1vhYczLxQ0Uuwe GDUb1i4/o7O0t3HtxKrq4sBgjFjx4N8Cz5rqz/DcVUjOVL1dGhEZglk9ZVMavu+41Q0L wpEHpK/9m8/lGymYXMIYv1BHj6Ca05gYT2w7ec7knu/AvcX9Sc86L5jY091oaDZJTn5Y jvfw== X-Original-Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=mhocko@kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org X-Gm-Message-State: AHQUAuZ71wk2MGnHPRD72GAVJGVbAOl2uHmQDg7zZN/YiC8MJM3QEUdH Uhk/aZmoORJ5XpsSHzGkXF8VtDAjtVtm61rsaq8GJdPkyQoA+ovuj7UWloFvMlTtXOlwz9Xh3i3 LCYiErvQRCXPBwoMHVe36i/6OD0tivTD9TekLq2usypoz6aOAE/g3gF/aVBqhm+Q= X-Received: by 2002:a50:b786:: with SMTP id h6mr15156496ede.85.1551110642300; Mon, 25 Feb 2019 08:04:02 -0800 (PST) X-Google-Smtp-Source: AHgI3IbrQNwNB+dUETq2JTLE72K1TdNIAOY2it4IIFomYoxZL4x4aHWmCNtj0hvjD6D9ekx6/82T X-Received: by 2002:a50:b786:: with SMTP id h6mr15156442ede.85.1551110641446; Mon, 25 Feb 2019 08:04:01 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551110641; cv=none; d=google.com; s=arc-20160816; b=LREZzTCNwHzrP9K/PTGHsAtpO6wvI96dPG8N8MLROjggWDOUQEOZog0M/l6y9/QzvZ /TJvU2iQM6606OE1HoMTMToIvHaF4Y8iK8/m1//D4Moz8ab6fw19yLECgGah2m5nEmY2 mqMmGpXmi3+LLxiVlyf51niTmWpN4G1cUxkH8fOyRKQg00WDv/BA9I8V1mV1dEfo2/O2 UGPx1TPv8vxj7a68Hcl6XGjR4Os0Ngk0GusxVmwuJEhEjhL9B68XN4gxKQLM2NQz6BEV lbOLI+G+Lbeg/qz/co3WWoMbfeLhvzcrZVaG99mbpAg+ylR1DML6fJMvKaJEviXUXbaj K9ow== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date; bh=PNfhIfgwn33iwuw0DDDVaGD8aew2O6QdLi3sHg5XfjY=; b=dZ4/I7PA7OXpnS1KJmpHl8ht/3txlQjCfJdzGOWZzj/OMrNYnlbJugvY44+/JaTFmZ sNF1XkRSM+CsEebllhB2UsyO2BJfkXqNyeHiPmazSDYm0tZRte13YFbbCdCNIKBNvs1U /V4kl3FzDPPCD7k95VI8YpDL1NTXlX5c87S1Rx3GIzjYQ2lTAhUvkrt+RzGdOcopcSXj ECse7oipPAm8aMMyPBoGjCKemR7r7gtwS7dhcbIs2auMMK0M/d3qDHSZbnRp4foiORnZ 03wKMPswc9S2EpNGYhZmQ5s7OEPSCD8nStXWbulVZ5SWFqlmOxEtp4tGnz9WpXP6kLQ4 klSg== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=mhocko@kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id v32si1463482edc.184.2019.02.25.08.04.01 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 25 Feb 2019 08:04:01 -0800 (PST) Received-SPF: softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=mhocko@kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 99F59AFCB; Mon, 25 Feb 2019 16:04:00 +0000 (UTC) Date: Mon, 25 Feb 2019 17:03:58 +0100 From: Michal Hocko To: Pingfan Liu Cc: x86@kernel.org, linux-mm@kvack.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Dave Hansen , Vlastimil Babka , Mike Rapoport , Andrew Morton , Mel Gorman , Joonsoo Kim , Andy Lutomirski , Andi Kleen , Petr Tesarik , Stephen Rothwell , Jonathan Corbet , Nicholas Piggin , Daniel Vacek , linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/6] make memblock allocator utilize the node's fallback info Message-ID: <20190225160358.GW10588@dhcp22.suse.cz> References: <1551011649-30103-1-git-send-email-kernelfans@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1551011649-30103-1-git-send-email-kernelfans@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun 24-02-19 20:34:03, Pingfan Liu wrote: > There are NUMA machines with memory-less node. At present page allocator builds the > full fallback info by build_zonelists(). But memblock allocator does not utilize > this info. And for memory-less node, memblock allocator just falls back "node 0", > without utilizing the nearest node. Unfortunately, the percpu section is allocated > by memblock, which is accessed frequently after bootup. > > This series aims to improve the performance of per cpu section on memory-less node > by feeding node's fallback info to memblock allocator on x86, like we do for page > allocator. On other archs, it requires independent effort to setup node to cpumask > map ahead. Do you have any numbers to tell us how much does this improve the situation? -- Michal Hocko SUSE Labs