Re: [PATCH 1/4] create mm/Kconfig for arch-independent memory options

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From: Dave Hansen <haveblue@us.ibm.com>
To: Mike Kravetz <kravetz@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>, Andy Whitcroft <apw@shadowen.org>
Subject: Re: [PATCH 1/4] create mm/Kconfig for arch-independent memory options
Date: Mon, 04 Apr 2005 16:29:02 -0700	[thread overview]
Message-ID: <1112657342.27328.64.camel@localhost> (raw)
In-Reply-To: <20050404232254.GC6500@w-mikek2.ibm.com>

On Mon, 2005-04-04 at 16:22 -0700, Mike Kravetz wrote:
> Do you need to set ARCH_DISCONTIGMEM_DEFAULT instead of just
> CONFIG_ARCH_DISCONTIGMEM_ENABLE to have DISCONTIGMEM be the
> default? or am I missing something?  I don't see
> ARCH_DISCONTIGMEM_DEFAULT turned on by default in any of these
> patches.

It's a wee bit confusing, but I think it all works out.

Doing ARCH_DISCONTIGMEM_ENABLE=y turns off the FLATMEM option in the
mm/Kconfig prompt because FLATMEM depends on !ARCH_DISCONTIGMEM_ENABLE.
So, if you enable it, it will end up being the default because there's
no other choice.

For configs that *need* both options, you can re-enable FLATMEM with
ARCH_FLATMEM_ENABLE

-- Dave

WARNING: multiple messages have this Message-ID (diff)

From: Dave Hansen <haveblue@us.ibm.com>
To: Mike Kravetz <kravetz@us.ibm.com>
Cc: Andrew Morton <akpm@osdl.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-mm <linux-mm@kvack.org>, Andy Whitcroft <apw@shadowen.org>
Subject: Re: [PATCH 1/4] create mm/Kconfig for arch-independent memory options
Date: Mon, 04 Apr 2005 16:29:02 -0700	[thread overview]
Message-ID: <1112657342.27328.64.camel@localhost> (raw)
In-Reply-To: <20050404232254.GC6500@w-mikek2.ibm.com>

On Mon, 2005-04-04 at 16:22 -0700, Mike Kravetz wrote:
> Do you need to set ARCH_DISCONTIGMEM_DEFAULT instead of just
> CONFIG_ARCH_DISCONTIGMEM_ENABLE to have DISCONTIGMEM be the
> default? or am I missing something?  I don't see
> ARCH_DISCONTIGMEM_DEFAULT turned on by default in any of these
> patches.

It's a wee bit confusing, but I think it all works out.

Doing ARCH_DISCONTIGMEM_ENABLE=y turns off the FLATMEM option in the
mm/Kconfig prompt because FLATMEM depends on !ARCH_DISCONTIGMEM_ENABLE.
So, if you enable it, it will end up being the default because there's
no other choice.

For configs that *need* both options, you can re-enable FLATMEM with
ARCH_FLATMEM_ENABLE

-- Dave

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next prev parent reply	other threads:[~2005-04-04 23:31 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-04-04 17:50 [PATCH 1/4] create mm/Kconfig for arch-independent memory options Dave Hansen
2005-04-04 17:50 ` Dave Hansen
2005-04-04 23:22 ` Mike Kravetz
2005-04-04 23:22   ` Mike Kravetz
2005-04-04 23:29   ` Dave Hansen [this message]
2005-04-04 23:29     ` Dave Hansen
2005-04-06 20:58 ` Roman Zippel
2005-04-06 20:58   ` Roman Zippel
2005-04-06 21:01   ` Dave Hansen
2005-04-06 21:01     ` Dave Hansen
2005-04-06 23:40     ` Roman Zippel
2005-04-06 23:40       ` Roman Zippel
2005-04-06 23:57       ` Dave Hansen
2005-04-06 23:57         ` Dave Hansen
2005-04-07  0:30         ` Roman Zippel
2005-04-07  0:30           ` Roman Zippel
2005-04-07 15:30           ` Dave Hansen
2005-04-07 15:30             ` Dave Hansen
2005-04-07 16:36           ` Dave Hansen

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