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Date: Wed, 17 Mar 2010 11:37:20 -0500 (CDT)
From: Christoph Lameter <cl@linux-foundation.org>
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To: Mel Gorman <mel@csn.ul.ie>
cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Andrea Arcangeli <aarcange@redhat.com>, Adam Litke <agl@us.ibm.com>,
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       Rik van Riel <riel@redhat.com>, linux-kernel@vger.kernel.org,
       linux-mm@kvack.org
Subject: Re: [PATCH 04/11] Allow CONFIG_MIGRATION to be set without CONFIG_NUMA
 or memory hot-remove
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References: <1268412087-13536-1-git-send-email-mel@csn.ul.ie> <1268412087-13536-5-git-send-email-mel@csn.ul.ie> <20100317110748.4C94.A69D9226@jp.fujitsu.com> <20100317113205.GC12388@csn.ul.ie>
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On Wed, 17 Mar 2010, Mel Gorman wrote:

> > If select MIGRATION works, we can remove "depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE"
> > line from config MIGRATION.
> >
>
> I'm not quite getting why this would be an advantage. COMPACTION
> requires MIGRATION but conceivable both NUMA and HOTREMOVE can work
> without it.

Avoids having to add additional CONFIG_XXX on the page migration "depends"
line in the future.


From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Wed, 17 Mar 2010 11:37:20 -0500 (CDT)
From: Christoph Lameter <cl@linux-foundation.org>
Subject: Re: [PATCH 04/11] Allow CONFIG_MIGRATION to be set without CONFIG_NUMA
 or memory hot-remove
In-Reply-To: <20100317113205.GC12388@csn.ul.ie>
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References: <1268412087-13536-1-git-send-email-mel@csn.ul.ie> <1268412087-13536-5-git-send-email-mel@csn.ul.ie> <20100317110748.4C94.A69D9226@jp.fujitsu.com> <20100317113205.GC12388@csn.ul.ie>
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To: Mel Gorman <mel@csn.ul.ie>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <aarcange@redhat.com>, Adam Litke <agl@us.ibm.com>, Avi Kivity <avi@redhat.com>, David Rientjes <rientjes@google.com>, Rik van Riel <riel@redhat.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>

On Wed, 17 Mar 2010, Mel Gorman wrote:

> > If select MIGRATION works, we can remove "depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE"
> > line from config MIGRATION.
> >
>
> I'm not quite getting why this would be an advantage. COMPACTION
> requires MIGRATION but conceivable both NUMA and HOTREMOVE can work
> without it.

Avoids having to add additional CONFIG_XXX on the page migration "depends"
line in the future.

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