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=-3.8 required=3.0 tests=BAYES_00, 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 B751EC433ED for ; Wed, 14 Apr 2021 15:56:55 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2E0B2610C8 for ; Wed, 14 Apr 2021 15:56:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2E0B2610C8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id AC3A96B0036; Wed, 14 Apr 2021 11:56:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A73CD6B006C; Wed, 14 Apr 2021 11:56:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8C5C06B0070; Wed, 14 Apr 2021 11:56:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0065.hostedemail.com [216.40.44.65]) by kanga.kvack.org (Postfix) with ESMTP id 706326B0036 for ; Wed, 14 Apr 2021 11:56:54 -0400 (EDT) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 2B52418043DC2 for ; Wed, 14 Apr 2021 15:56:54 +0000 (UTC) X-FDA: 78031425948.01.20EEE51 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by imf23.hostedemail.com (Postfix) with ESMTP id E072EA000395 for ; Wed, 14 Apr 2021 15:56:51 +0000 (UTC) IronPort-SDR: aZzVIabsTZXc448d1J+BlqUAVIzJh0bncf7j+PrS6bPTrq6Zp+rEKBABXHJXTjPfQDxlZsR7KA xTzFBzOSPGCQ== X-IronPort-AV: E=McAfee;i="6200,9189,9954"; a="258633876" X-IronPort-AV: E=Sophos;i="5.82,222,1613462400"; d="scan'208";a="258633876" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2021 08:56:50 -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> X-Rspamd-Queue-Id: E072EA000395 X-Stat-Signature: mc7w9iges5orkq8s6zdkssbwmugq1uf4 X-Rspamd-Server: rspam02 Received-SPF: none (linux.intel.com>: No applicable sender policy available) receiver=imf23; identity=mailfrom; envelope-from=""; helo=mga07.intel.com; client-ip=134.134.136.100 X-HE-DKIM-Result: none/none X-HE-Tag: 1618415811-991827 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: > 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