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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,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 E32F6C63777 for ; Thu, 3 Dec 2020 12:52:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9D6CF21D91 for ; Thu, 3 Dec 2020 12:52:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D6CF21D91 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=molgen.mpg.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id B3A8A6B0068; Thu, 3 Dec 2020 07:52:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id AEA4C6B0070; Thu, 3 Dec 2020 07:52:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A01AA6B0071; Thu, 3 Dec 2020 07:52:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0126.hostedemail.com [216.40.44.126]) by kanga.kvack.org (Postfix) with ESMTP id 886C46B0068 for ; Thu, 3 Dec 2020 07:52:46 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 5187D181AEF39 for ; Thu, 3 Dec 2020 12:52:46 +0000 (UTC) X-FDA: 77551960332.18.glass35_4d096a4273bb Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin18.hostedemail.com (Postfix) with ESMTP id 3A3D4100ED0DE for ; Thu, 3 Dec 2020 12:52:46 +0000 (UTC) X-HE-Tag: glass35_4d096a4273bb X-Filterd-Recvd-Size: 1823 Received: from mx1.molgen.mpg.de (mx3.molgen.mpg.de [141.14.17.11]) by imf43.hostedemail.com (Postfix) with ESMTP for ; Thu, 3 Dec 2020 12:52:45 +0000 (UTC) Received: from [141.14.220.45] (g45.guest.molgen.mpg.de [141.14.220.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 6A6E520646215; Thu, 3 Dec 2020 13:52:43 +0100 (CET) Subject: Re: Deferred Memory Init: How to bring rest of memory online after limiting it with `mem=XG`? To: David Hildenbrand Cc: linux-mm@kvack.org, Arjan van de Ven , Feng Tang References: <808e493f-18a2-fe82-46b3-e44fe87e989c@redhat.com> From: Paul Menzel Message-ID: <8a395c1a-764b-9d82-0a12-b1a9254f8d53@molgen.mpg.de> Date: Thu, 3 Dec 2020 13:52:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <808e493f-18a2-fe82-46b3-e44fe87e989c@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000007, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Dear David, Thank you for the quick response. Am 03.12.20 um 13:25 schrieb David Hildenbrand: > On 03.12.20 11:51, Paul Menzel wrote: >> I am trying to reduce the startup time of Debian=E2=80=99s Linux 5.9.9= on a >> Intel Kaby Lake system with 32 GB of memory (TUXEDO Book BU1406 (Clevo >> N240BU)). [=E2=80=A6] > We do have deferred meminit in the kernel during boot that can > initialize memory in parallel. Is that used automatically, or do I need to activate it somehow? Kind regards, Paul