From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752499AbeDJC7a (ORCPT ); Mon, 9 Apr 2018 22:59:30 -0400 Received: from out30-132.freemail.mail.aliyun.com ([115.124.30.132]:51862 "EHLO out30-132.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752472AbeDJC72 (ORCPT ); Mon, 9 Apr 2018 22:59:28 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R931e4;CH=green;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01429;MF=zoucao@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0T-wYORb_1523329153; From: zoucao@linux.alibaba.com To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com Cc: x86@kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V2] x86/boot/e820: add new chareater - to free BIOS memory in memmap bootargs Date: Tue, 10 Apr 2018 10:59:11 +0800 Message-Id: <20180410025912.49830-1-zoucao@linux.alibaba.com> X-Mailer: git-send-email 2.14.1.40.g8e62ba1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org this is useing memmap=0x4101000-0x6aeff000 to free BIOS reserved memory "6aeff000-6effffff : reserved": ...... 00100000-6aefefff : System RAM 01000000-0165537a : Kernel code 0165537b-01a8873f : Kernel data 01c31000-01f4efff : Kernel bss 28000000-320fffff : Crash kernel 6aeff000-6effffff : reserved --> it is e820 reserved memory 6f000000-78240fff : System RAM ...... add bootargs memmap=0x4101000-0x6aeff000, to free memory region: 6aeff000-6effffff then 6aeff000-6effffff will be merged into 00100000-78240fff. new iomem: cat /proc/iomem: ...... 00100000-78240fff : System RAM 01000000-0165537a : Kernel code 0165537b-01a8873f : Kernel data 01c31000-01f4efff : Kernel bss ...... V1>V2: fixed the wrong chareaters zoucao (1): x86/boot/e820: add new chareater "-" to free BIOS memory in memmap bootargs 7u/Documentation/kernel-parameters.txt | 6 ++++++ 7u/arch/x86/kernel/e820.c | 3 +++ 2 files changed, 9 insertions(+)