From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f200.google.com (mail-pf0-f200.google.com [209.85.192.200]) by kanga.kvack.org (Postfix) with ESMTP id 244B983090 for ; Fri, 26 Aug 2016 06:26:19 -0400 (EDT) Received: by mail-pf0-f200.google.com with SMTP id w128so139006881pfd.3 for ; Fri, 26 Aug 2016 03:26:19 -0700 (PDT) Received: from foss.arm.com (foss.arm.com. [217.140.101.70]) by mx.google.com with ESMTP id u190si20640219pfb.43.2016.08.26.03.26.18 for ; Fri, 26 Aug 2016 03:26:18 -0700 (PDT) Date: Fri, 26 Aug 2016 11:26:18 +0100 From: Will Deacon Subject: Re: [RFC PATCH v3 0/2] arm64/hugetlb: enable gigantic page Message-ID: <20160826102617.GG13554@arm.com> References: <1471872004-59365-1-git-send-email-xieyisheng1@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1471872004-59365-1-git-send-email-xieyisheng1@huawei.com> Sender: owner-linux-mm@kvack.org List-ID: To: Xie Yisheng Cc: akpm@linux-foundation.org, mhocko@kernel.org, guohanjun@huawei.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, mhocko@suse.com, dave.hansen@intel.com, sudeep.holla@arm.com, catalin.marinas@arm.com, mark.rutland@arm.com, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, mike.kravetz@oracle.com, n-horiguchi@ah.jp.nec.com On Mon, Aug 22, 2016 at 09:20:02PM +0800, Xie Yisheng wrote: > Arm64 supports different size of gigantic page which can be seen from: > commit 084bd29810a5 ("ARM64: mm: HugeTLB support.") > commit 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit") > > So I tried to use this function by adding hugepagesz=1G in kernel > parameters, with CONFIG_CMA=y. However, when I > echo xx > \ > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages > it failed with the following info: > -bash: echo: write error: Invalid argument > > This is a v3 patchset which make gigantic page can be > allocated and freed at runtime for arch arm64, > with CONFIG_CMA=y or other related configs is enabled. > > You can see the former discussions at: > https://lkml.org/lkml/2016/8/18/310 > https://lkml.org/lkml/2016/8/21/410 > > Xie Yisheng (2): > mm/hugetlb: Introduce ARCH_HAS_GIGANTIC_PAGE > arm64 Kconfig: Select gigantic page > > arch/arm64/Kconfig | 1 + > arch/s390/Kconfig | 1 + > arch/x86/Kconfig | 1 + > fs/Kconfig | 3 ++++ > mm/hugetlb.c | 2 +- > 5 files changed, 7 insertions(+), 1 deletion(-) I assume you plan to merge this via -mm/akpm, given that Catalin has acked the arm64 part? Will -- 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