Received: by 2002:a05:6a10:17d3:0:0:0:0 with SMTP id hz19csp119006pxb; Wed, 14 Apr 2021 10:47:22 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzHv4+xYoA9H4+j6CviIRhVnDIsc2Z7OwYptzHooQuzLMMfZDoR7eKQOIEu0OXohIB/44Su X-Received: by 2002:a05:6a00:d41:b029:241:6449:e96 with SMTP id n1-20020a056a000d41b029024164490e96mr34813055pfv.75.1618422442657; Wed, 14 Apr 2021 10:47:22 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1618422442; cv=none; d=google.com; s=arc-20160816; b=KBbqkvCIt4gZZ4+ju5axhqbBDUfzAJYkImzpVebgI35MJJPy19+ibSh/X/wUT685SE RN9h4h2t3Yse/cjwymAfiiPl16ip8cJg9YLpee7mPSrAbti98AxTERjAQfRS9csOC8bA Kj4TgmQLVTgg1EDXco40fckFhg+tubDkVJs+ehb8e0q08QXYKI+hNZV9eRqpdi5pj83j cPwW2QtY4AiJHquULbdvLmtoVwlzPJ8CbG69T90dZlu1HR24li/EGTtUKw1akRpq6zdl XPOjzrxXzZf8K01WGGEkBcdBZrEOQ7kh7JDT7vv8b2w9T33haC2VRt3DMlpGEv3Z6yjn Zt9w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:ironport-sdr :ironport-sdr; bh=2qjqrkFVl4lPKwuIpyJms+1V29eisEOFTqST/KkUW/Q=; b=tkCjBTWYYAVwXJKIYspOdaKDfjrpaHrgWUNz+Fk/rx7/RuTm05kxrUY5aL14iGNoko /HjBkJHLjPlmokUkqQpmH56JHPVtuM8HkT4Z0qI0C8UYACWWiHhzDhF4O7dQZD8H/yTT 6wONOSxeo5AerdaohAr/EW9FQt2Kf0cGL/BqnzP1TydVZ9Gt4QcLj/YnFBF9OHLto0VX /ZvQ84V0h/K9CO3skCWKjxo4/Bn6MV0wcbTthwBRurwEdLmPGkszKfMpo1PjHntwiuR4 +KqSmTuTtUqDob5FG+841NeuaYAQ6sDlm886LtNctP9oExteLPeLuXT40Lx5boDGUbEW EMGA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id v6si265309pjr.166.2021.04.14.10.47.04; Wed, 14 Apr 2021 10:47:22 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351078AbhDNP5O (ORCPT + 99 others); Wed, 14 Apr 2021 11:57:14 -0400 Received: from mga11.intel.com ([192.55.52.93]:5216 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232662AbhDNP5N (ORCPT ); Wed, 14 Apr 2021 11:57:13 -0400 IronPort-SDR: WDd4lPt1AuUiPreH8j9oQz4plKBc1BpV+sYlUBm//YikBAKUVeap2Iu1aDf/udGQeWPdQ9yCyi 40flsVQcscRw== X-IronPort-AV: E=McAfee;i="6200,9189,9954"; a="191484140" X-IronPort-AV: E=Sophos;i="5.82,222,1613462400"; d="scan'208";a="191484140" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2021 08:56:49 -0700 IronPort-SDR: 5Y/X998Ljj2Jxjpfsq/hVDjcfZCU8JZsvF2rGTzQLUNE5VeNnxg7dntcgoHjF/Yw47zakGLESf lI5RfYJka5kg== X-IronPort-AV: E=Sophos;i="5.82,222,1613462400"; d="scan'208";a="443861179" Received: from tassilo.jf.intel.com ([10.54.74.11]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2021 08:56:48 -0700 Date: Wed, 14 Apr 2021 08:56:47 -0700 From: Andi Kleen To: Rik van Riel Cc: "Huang, Ying" , Yu Zhao , Dave Chinner , Jens Axboe , SeongJae Park , Linux-MM , Andrew Morton , Benjamin Manes , Dave Hansen , Hillf Danton , Johannes Weiner , Jonathan Corbet , Joonsoo Kim , Matthew Wilcox , Mel Gorman , Miaohe Lin , Michael Larabel , Michal Hocko , Michel Lespinasse , Roman Gushchin , Rong Chen , SeongJae Park , Tim Chen , Vlastimil Babka , Yang Shi , Zi Yan , linux-kernel , lkp@lists.01.org, Kernel Page Reclaim v2 Subject: Re: [PATCH v2 00/16] Multigenerational LRU Framework Message-ID: <20210414155647.GV3762101@tassilo.jf.intel.com> References: <20210413075155.32652-1-sjpark@amazon.de> <3ddd4f8a-8e51-662b-df11-a63a0e75b2bc@kernel.dk> <20210413231436.GF63242@dread.disaster.area> <87tuo9qtmd.fsf@yhuang6-desk1.ccr.corp.intel.com> <87lf9lqnit.fsf@yhuang6-desk1.ccr.corp.intel.com> <93308ea276cfe7997c29ce7132516e830e8fec40.camel@surriel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <93308ea276cfe7997c29ce7132516e830e8fec40.camel@surriel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Now imagine we have an 8 node system, and memory > pressure in the DMA32 zone of node 0. The question is how much do we still care about DMA32. If there are problems they can probably just turn on the IOMMU for these IO mappings. -Andi