From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx132.postini.com [74.125.245.132]) by kanga.kvack.org (Postfix) with SMTP id CB0E86B00E1 for ; Wed, 12 Sep 2012 11:32:08 -0400 (EDT) Date: Wed, 12 Sep 2012 17:32:06 +0200 From: Michal Hocko Subject: Re: [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE Message-ID: <20120912153206.GT21579@dhcp22.suse.cz> References: <1347382036-18455-1-git-send-email-will.deacon@arm.com> <1347382036-18455-4-git-send-email-will.deacon@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1347382036-18455-4-git-send-email-will.deacon@arm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Will Deacon Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, akpm@linux-foundation.org, Steve Capper On Tue 11-09-12 17:47:16, Will Deacon wrote: > From: Steve Capper > > Different architectures have slightly different pre-requisites for supporting > Transparent Huge Pages. To simplify the layout of mm/Kconfig, a new option > HAVE_ARCH_TRANSPARENT_HUGEPAGE is introduced and set in each architecture's > Kconfig file (at the moment x86, with ARM being set in a future patch). > > Signed-off-by: Steve Capper > Signed-off-by: Will Deacon Makes sense if there are going to be more archs to support THP. Reviewed-by: Michal Hocko > --- > arch/x86/Kconfig | 4 ++++ > mm/Kconfig | 2 +- > 2 files changed, 5 insertions(+), 1 deletions(-) > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 8ec3a1a..7decdcf 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -1297,6 +1297,10 @@ config ILLEGAL_POINTER_VALUE > default 0 if X86_32 > default 0xdead000000000000 if X86_64 > > +config HAVE_ARCH_TRANSPARENT_HUGEPAGE > + def_bool y > + depends on MMU > + > source "mm/Kconfig" > > config HIGHPTE > diff --git a/mm/Kconfig b/mm/Kconfig > index d5c8019..3322342 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -318,7 +318,7 @@ config NOMMU_INITIAL_TRIM_EXCESS > > config TRANSPARENT_HUGEPAGE > bool "Transparent Hugepage Support" > - depends on X86 && MMU > + depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE > select COMPACTION > help > Transparent Hugepages allows the kernel to use huge pages and > -- > 1.7.4.1 > -- 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