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=-0.8 required=3.0 tests=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 4F44FC54FCB for ; Thu, 23 Apr 2020 15:28:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CCF72071E for ; Thu, 23 Apr 2020 15:28:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729174AbgDWP24 (ORCPT ); Thu, 23 Apr 2020 11:28:56 -0400 Received: from mout.kundenserver.de ([212.227.126.135]:43171 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729014AbgDWP24 (ORCPT ); Thu, 23 Apr 2020 11:28:56 -0400 Received: from [192.168.178.29] ([46.223.232.170]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MmUYD-1ijCLP2xNp-00iVJm for ; Thu, 23 Apr 2020 17:28:54 +0200 From: Erik Rull Subject: Huge difference in reserved memory - how to find? To: linux-kernel@vger.kernel.org Message-ID: Date: Thu, 23 Apr 2020 17:28:54 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0 SeaMonkey/2.53.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:rzGcRtocErqHMEBlt9++JRuiXFDRZ+aRw7O4NAKnkFmJ3bYKXEB cJyFUxlGIXz27u1vDTxHAmrBUA61DvYV978SIG20X8yrHxC6ACHBKA5qOsY9IEwXpCGctwI sy+UGMr9TomUQBlv6yG1CjqdHcNUA8pIIrfSzLquJ0arg8RH8gGAYre9eFM93rU0jX9/pte euTUjaMTaMWD4GNDKzXgg== X-UI-Out-Filterresults: notjunk:1;V03:K0:j52MhtoBE+w=:e6oeCUiluIh1kvketDBBtV lHDRyYLZK10b3/y+MUI43tx9FjN2V0PTnqqIJGuycARkDw1AtFZ7HaXTwnDSHKtXcRSTUJbes DbS1BvH+/b8fPPV5NhnXArmFTC3uPhTqyR8I2QQAepl3zEUaAN9vN/l+JyxJOj4YMP/pYGSHl G7df3XLjc9XzZY0Cm+U2FUyF1nfShuG4bqDupgp7NgRV40/CCM6R31JdaziKEyDiX8HXDTED9 ksIm64QZvqTCUDbqfQNl5zNPLG6IC08dapdkNXR41qxRTS/EC+oQAxgepBJTycxphUIbDFPvZ /PGEizweFzkIARydMo2gBTp+TAOZKz/kroeTauvjgsZvD0apXXExEd8FwX5kNidM3reoZZDbJ WdYRoXlfzrTCoFntV55bfu9iFx3XRbwd092c4HOQdNBy0sSO5S1tt/XoeplVsVRcJ+zUXQCC7 XvhoTGAa4np1wrkbwW5Ay7cx54rDFpycxuTsv4fzu0F6H4F6YJ+aokSZhPg+XVQNlGMI0HpPg 3I/uHId4EQtG6ReYXpriZ3oarzfHsH9tt7cPEWfk+GDu9IAuPI2iz2esKULzz4EE1BtyAbD5H eM+AmD8MtNT8Ic/uxMIIn9FQMnGaD1E5ezX+ZmLI7SsHvQUyHYs9LvUwuLtoGSygh7+UaM+8e 5un7krCAGcQy91kAGasylWmob/WxhGBBQyAg/t/fKlocElmtB0yZsUZVU1ydT9Jd0sS8NU1Ev 81ldDK02wxlehA851Nbi0hcgvq1dhMnqBVfrWNEN6x99uY45MyO6HU4nOhApC8lqchRbu6jR3 yxuEsR+VJF5XmeEMy97X0f6jGmAFovgCPu5unu6iw/W52waiKG+PDA+IZtco3W4pkfvtf6p Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear all, I'm trying to move from 3.4.67 to 4.19 on a rather old Intel CPU and run into some memory trouble I do not understand: The point that confuses me is the difference in the following line: 3.4.67: [ 0.000000] Memory: 235736k/261056k available (4695k kernel code, 24872k reserved, 2889k data, 564k init, 0k highmem) 4.19.82-rt30: [ 0.534687] Memory: 165244K/260668K available (9050K kernel code, 821K rwdata, 2500K rodata, 808K init, 440K bss, 95424K reserved, 0K cma-reserved, 0K highmem) Why is so much memory reserved in the 4.19? I would like to understand why and how I could reduce that. I need some more space on the system to let my application run. Thanks a lot! Best regards, Erik