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

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Message-ID: <20120913212613.GA11399@mudshark.cambridge.arm.com>
Date:	Thu, 13 Sep 2012 22:26:13 +0100
From:	Will Deacon <will.deacon@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	"mhocko@...e.cz" <mhocko@...e.cz>,
	Steve Capper <Steve.Capper@....com>,
	Gerald Schaefer <gerald.schaefer@...ibm.com>
Subject: Re: [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE

Hi Andrew,

On Thu, Sep 13, 2012 at 08:05:14PM +0100, Andrew Morton wrote:
> On Tue, 11 Sep 2012 17:47:16 +0100
> Will Deacon <will.deacon@....com> wrote:
> > 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
> 
> We need to talk with Gerald concerning
> http://ozlabs.org/~akpm/mmotm/broken-out/thp-x86-introduce-have_arch_transparent_hugepage.patch
> 
> 
> I did this.  Please check.

[...]

We missed Gerald's patch for s390 and, having picked it into our tree, it
acts as a drop-in replacement for what we came up with. So I think you
can just drop our patch ("mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE")
altogether.

Cheers,

Will
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