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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 7510BC433E0 for ; Mon, 22 Feb 2021 11:15:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id EC69C64E77 for ; Mon, 22 Feb 2021 11:15:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EC69C64E77 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 643476B0075; Mon, 22 Feb 2021 06:15:15 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5F2C36B0078; Mon, 22 Feb 2021 06:15:15 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5097F8D0001; Mon, 22 Feb 2021 06:15:15 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0085.hostedemail.com [216.40.44.85]) by kanga.kvack.org (Postfix) with ESMTP id 38EFB6B0075 for ; Mon, 22 Feb 2021 06:15:15 -0500 (EST) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id EECDE181AF5C6 for ; Mon, 22 Feb 2021 11:15:14 +0000 (UTC) X-FDA: 77845647348.12.15CBB5D Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf22.hostedemail.com (Postfix) with ESMTP id B5F80C000C74 for ; Mon, 22 Feb 2021 11:15:11 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 35868ACCF; Mon, 22 Feb 2021 11:15:13 +0000 (UTC) Date: Mon, 22 Feb 2021 12:15:10 +0100 From: Oscar Salvador To: Andrew Morton Cc: David Hildenbrand , Michal Hocko , VlastimilBabkavbabka@suse.cz, pasha.tatashin@soleen.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Anshuman Khandual Subject: Re: [PATCH v2 0/7] Allocate memmap from hotadded memory (per device) Message-ID: <20210222111506.GA23651@linux> References: <20210209133854.17399-1-osalvador@suse.de> <20210217101851.GA28996@linux> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210217101851.GA28996@linux> User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: B5F80C000C74 X-Stat-Signature: 58556fx65rxoegs686jbfgk76w3mw9bj Received-SPF: none (suse.de>: No applicable sender policy available) receiver=imf22; identity=mailfrom; envelope-from=""; helo=mx2.suse.de; client-ip=195.135.220.15 X-HE-DKIM-Result: none/none X-HE-Tag: 1613992511-775417 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, Feb 17, 2021 at 11:18:59AM +0100, Oscar Salvador wrote: > On Tue, Feb 09, 2021 at 02:38:47PM +0100, Oscar Salvador wrote: > > Hi, > > > > here is v2. > > > > Changes from v1 -> v2 > > - Addressed feedback from David > > - Fence off the feature in case struct page size is not > > multiple of PMD size or pageblock alignment cannot be guaranted > > - Tested on x86_64 small and large memory_blocks > > - Tested on arm64 4KB and 64KB page sizes (for some reason I cannot boot > > my VM with 16KB page size). > > > > Arm64 with 4KB page size behaves like x86_64 after [1], which made section > > size smaller. > > With 64KB, the feature gets fenced off due to pageblock alignment. > > > > Changes from RFCv3 -> v1: > > - Addressed feedback from David > > - Re-order patches > > > > Changes from v2 -> v3 (RFC): > > - Re-order patches (Michal) > > - Fold "mm,memory_hotplug: Introduce MHP_MEMMAP_ON_MEMORY" in patch#1 > > - Add kernel boot option to enable this feature (Michal) > > > > Changes from v1 -> v2 (RFC): > > - Addressed feedback provided by David > > - Add a arch_support_memmap_on_memory to be called > > from mhp_supports_memmap_on_memory, as atm, > > only ARM, powerpc and x86_64 have altmat support. > > > > [1] https://lore.kernel.org/lkml/cover.1611206601.git.sudaraja@codeaurora.org/ > > Let me refloat this one :-) Kindly ping :-) -- Oscar Salvador SUSE L3