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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,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 05539C12002 for ; Wed, 14 Jul 2021 21:48:35 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 91C866136E for ; Wed, 14 Jul 2021 21:48:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 91C866136E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id B57F86B009C; Wed, 14 Jul 2021 17:48:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B2EC96B009D; Wed, 14 Jul 2021 17:48:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A1DDF6B009E; Wed, 14 Jul 2021 17:48:34 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0112.hostedemail.com [216.40.44.112]) by kanga.kvack.org (Postfix) with ESMTP id 792B76B009C for ; Wed, 14 Jul 2021 17:48:34 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 4303C18124500 for ; Wed, 14 Jul 2021 21:48:33 +0000 (UTC) X-FDA: 78362532906.13.91BDF84 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf11.hostedemail.com (Postfix) with ESMTP id D4434F0000B6 for ; Wed, 14 Jul 2021 21:48:32 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 5DCCE6128B; Wed, 14 Jul 2021 21:48:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1626299311; bh=sm6E/cbteIMU7Qx63UQrMGOgDgJUOWcBWsYvE7fWGnE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=LcfdOszA4jr3910Y2aYZb+/wqExxuo8m4IfDbZeRsgsuuSO0V5U2tJEzhmuVuSH3n 4YY11zKSmpdTlfu6K4XTlHnO4/gU5hFcVqnAFv8sQGeEisNUeJKGJBv1H+q+S4gc7q hnVnGR3Dt+OlShBPewICHWBbLoUKSqQ0IPlhkstY= Date: Wed, 14 Jul 2021 14:48:30 -0700 From: Andrew Morton To: Joao Martins Cc: linux-mm@kvack.org, Dan Williams , Vishal Verma , Dave Jiang , Naoya Horiguchi , Matthew Wilcox , Jason Gunthorpe , John Hubbard , Jane Chu , Muchun Song , Mike Kravetz , Jonathan Corbet , nvdimm@lists.linux.dev, linux-doc@vger.kernel.org Subject: Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps Message-Id: <20210714144830.29f9584878b04903079ef7eb@linux-foundation.org> In-Reply-To: <20210714193542.21857-1-joao.m.martins@oracle.com> References: <20210714193542.21857-1-joao.m.martins@oracle.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=LcfdOszA; spf=pass (imf11.hostedemail.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-Rspamd-Server: rspam02 X-Stat-Signature: jgtmqwz6xg65szpwniq8mesdz5ch1skx X-Rspamd-Queue-Id: D4434F0000B6 X-HE-Tag: 1626299312-938506 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 Wed, 14 Jul 2021 20:35:28 +0100 Joao Martins wrote: > This series, attempts at minimizing 'struct page' overhead by > pursuing a similar approach as Muchun Song series "Free some vmemmap > pages of hugetlb page"[0] but applied to devmap/ZONE_DEVICE which is now > in mmotm. > > [0] https://lore.kernel.org/linux-mm/20210308102807.59745-1-songmuchun@bytedance.com/ [0] is now in mainline. This patch series looks like it'll clash significantly with the folio work and it is pretty thinly reviewed, so I think I'll take a pass for now. Matthew, thoughts?