From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f43.google.com (mail-lf0-f43.google.com [209.85.215.43]) by kanga.kvack.org (Postfix) with ESMTP id 3D5A76B007E for ; Tue, 5 Apr 2016 04:29:22 -0400 (EDT) Received: by mail-lf0-f43.google.com with SMTP id e190so3139387lfe.0 for ; Tue, 05 Apr 2016 01:29:22 -0700 (PDT) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com. [119.145.14.65]) by mx.google.com with ESMTPS id d13si18482682lfd.149.2016.04.05.01.29.18 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 05 Apr 2016 01:29:20 -0700 (PDT) From: Chen Feng Subject: [PATCH 1/2] arm64: mem-model: add flatmem model for arm64 Date: Tue, 5 Apr 2016 16:22:51 +0800 Message-ID: <1459844572-53069-1-git-send-email-puck.chen@hisilicon.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: catalin.marinas@arm.com, will.deacon@arm.com, ard.biesheuvel@linaro.org, mark.rutland@arm.com, akpm@linux-foundation.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, mhocko@suse.com, kirill.shutemov@linux.intel.com, rientjes@google.com, linux-mm@kvack.org Cc: puck.chen@hisilicon.com, puck.chen@foxmail.com, oliver.fu@hisilicon.com, linuxarm@huawei.com, dan.zhao@hisilicon.com, suzhuangluan@hisilicon.com, yudongbin@hislicon.com, albert.lubing@hisilicon.com, xuyiping@hisilicon.com, saberlily.xia@hisilicon.com We can reduce the memory allocated at mem-map by flatmem. currently, the default memory-model in arm64 is sparse memory. The mem-map array is not freed in this scene. If the physical address is too long, it will reserved too much memory for the mem-map array. Signed-off-by: Chen Feng Signed-off-by: Fu Jun --- arch/arm64/Kconfig | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4f43622..c18930d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -559,6 +559,9 @@ config ARCH_SPARSEMEM_ENABLE def_bool y select SPARSEMEM_VMEMMAP_ENABLE +config ARCH_FLATMEM_ENABLE + def_bool y + config ARCH_SPARSEMEM_DEFAULT def_bool ARCH_SPARSEMEM_ENABLE -- 1.9.1 -- 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