From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f69.google.com (mail-wm0-f69.google.com [74.125.82.69]) by kanga.kvack.org (Postfix) with ESMTP id 93F666B0253 for ; Mon, 22 Aug 2016 04:01:04 -0400 (EDT) Received: by mail-wm0-f69.google.com with SMTP id o80so55663988wme.1 for ; Mon, 22 Aug 2016 01:01:04 -0700 (PDT) Received: from mail-wm0-f68.google.com (mail-wm0-f68.google.com. [74.125.82.68]) by mx.google.com with ESMTPS id v127si15030654wmb.147.2016.08.22.01.01.03 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 Aug 2016 01:01:03 -0700 (PDT) Received: by mail-wm0-f68.google.com with SMTP id i5so12222756wmg.2 for ; Mon, 22 Aug 2016 01:01:03 -0700 (PDT) Date: Mon, 22 Aug 2016 10:01:01 +0200 From: Michal Hocko Subject: Re: [RFC PATCH v2 1/2] mm/hugetlb: Introduce ARCH_HAS_GIGANTIC_PAGE Message-ID: <20160822080101.GE13596@dhcp22.suse.cz> References: <1471834603-27053-1-git-send-email-xieyisheng1@huawei.com> <1471834603-27053-2-git-send-email-xieyisheng1@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1471834603-27053-2-git-send-email-xieyisheng1@huawei.com> Sender: owner-linux-mm@kvack.org List-ID: To: Xie Yisheng Cc: akpm@linux-foundation.org, guohanjun@huawei.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, will.deacon@arm.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 22-08-16 10:56:42, Xie Yisheng wrote: > Avoid making ifdef get pretty unwieldy if many ARCHs support gigantic page. > No functional change with this patch. > > Signed-off-by: Xie Yisheng > --- > arch/s390/Kconfig | 1 + > arch/x86/Kconfig | 1 + > fs/Kconfig | 4 ++++ > mm/hugetlb.c | 2 +- > 4 files changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig > index e751fe2..a8c8fa3 100644 > --- a/arch/s390/Kconfig > +++ b/arch/s390/Kconfig > @@ -72,6 +72,7 @@ config S390 > select ARCH_HAS_DEVMEM_IS_ALLOWED > select ARCH_HAS_ELF_RANDOMIZE > select ARCH_HAS_GCOV_PROFILE_ALL > + select ARCH_HAS_GIGANTIC_PAGE > select ARCH_HAS_KCOV > select ARCH_HAS_SG_CHAIN > select ARCH_HAVE_NMI_SAFE_CMPXCHG > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index c580d8c..5cf959c 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -29,6 +29,7 @@ config X86 > select ARCH_HAS_ELF_RANDOMIZE > select ARCH_HAS_FAST_MULTIPLIER > select ARCH_HAS_GCOV_PROFILE_ALL > + select ARCH_HAS_GIGANTIC_PAGE if X86_64 > select ARCH_HAS_KCOV if X86_64 > select ARCH_HAS_PMEM_API if X86_64 > select ARCH_HAS_MMIO_FLUSH good > diff --git a/fs/Kconfig b/fs/Kconfig > index 2bc7ad7..b77ad0f 100644 > --- a/fs/Kconfig > +++ b/fs/Kconfig > @@ -199,6 +199,10 @@ config HUGETLBFS > config HUGETLB_PAGE > def_bool HUGETLBFS > > +config ARCH_HAS_GIGANTIC_PAGE > + depends on HUGETLB_PAGE > + bool > + but is this really necessary? The code where we use ARCH_HAS_GIGANTIC_PAGE already depends on HUGETLB_PAGE. Other than that looks good to me and a nice simplification. > source "fs/configfs/Kconfig" > source "fs/efivarfs/Kconfig" > > diff --git a/mm/hugetlb.c b/mm/hugetlb.c > index 87e11d8..8488dcc 100644 > --- a/mm/hugetlb.c > +++ b/mm/hugetlb.c > @@ -1022,7 +1022,7 @@ static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed) > ((node = hstate_next_node_to_free(hs, mask)) || 1); \ > nr_nodes--) > > -#if (defined(CONFIG_X86_64) || defined(CONFIG_S390)) && \ > +#if defined(CONFIG_ARCH_HAS_GIGANTIC_PAGE) && \ > ((defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || \ > defined(CONFIG_CMA)) > static void destroy_compound_gigantic_page(struct page *page, > -- > 1.7.12.4 -- Michal Hocko SUSE Labs -- 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