From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f197.google.com (mail-pf0-f197.google.com [209.85.192.197]) by kanga.kvack.org (Postfix) with ESMTP id B27E86B0005 for ; Thu, 11 Aug 2016 05:51:43 -0400 (EDT) Received: by mail-pf0-f197.google.com with SMTP id h186so126019034pfg.2 for ; Thu, 11 Aug 2016 02:51:43 -0700 (PDT) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com. [119.145.14.65]) by mx.google.com with ESMTPS id sq1si2488664pab.29.2016.08.11.02.47.26 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 11 Aug 2016 02:51:43 -0700 (PDT) Message-ID: <57AC490E.4080204@huawei.com> Date: Thu, 11 Aug 2016 17:44:46 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: arm64: why set SECTION_SIZE_BITS to 1G size? Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Catalin Marinas , Will Deacon Cc: Linux MM , LKML , chenjie6@huawei.com Hi everyone: arm64: SECTION_SIZE_BITS 30 -----1G The memory hotplug(add_memory -->check_hotplug_memory_range) must be aligned with section.So I can not add mem with 64M ... Can I modify the SECTION_SIZE_BITS to 26? Thanks, Xishi Qiu -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org