linux-kernel - Re: [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20120911174105.GB29805@shutemov.name>
Date:	Tue, 11 Sep 2012 20:41:05 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Will Deacon <will.deacon@....com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, akpm@...ux-foundation.org,
	mhocko@...e.cz, Steve Capper <steve.capper@....com>
Subject: Re: [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE

On Tue, Sep 11, 2012 at 05:47:16PM +0100, Will Deacon wrote:
> From: Steve Capper <steve.capper@....com>
> 
> 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 <steve.capper@....com>
> Signed-off-by: Will Deacon <will.deacon@....com>

Reviewed-by: Kirill A. Shutemov <kirill@...temov.name>

> ---
>  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
> 
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@...ck.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>

-- 
 Kirill A. Shutemov
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/