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From: Rik van Riel on 6 May 2010 11:40
On 05/06/2010 11:08 AM, Mel Gorman wrote:
> Migration normally requires a call to migrate_prep() as a preparation
> step. This schedules work on all CPUs for pagevecs to be drained. This
> makes sense for move_pages and memory hot-remove but is unnecessary
> for memory compaction.
>
> To avoid queueing work on multiple CPUs, this patch introduces
> migrate_prep_local() which drains just local pagevecs.
>
> This patch can be either merged with mmcompaction-memory-compaction-core.patch
> or placed immediately after it to clarify why migrate_prep_local() was
> introduced.
>
> Signed-off-by: Mel Gorman<mel(a)csn.ul.ie>

Reviewed-by: Rik van Riel <riel(a)redhat.com>
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From: KAMEZAWA Hiroyuki on 6 May 2010 20:20
On Thu, 6 May 2010 16:08:09 +0100
Mel Gorman <mel(a)csn.ul.ie> wrote:

> Migration normally requires a call to migrate_prep() as a preparation
> step. This schedules work on all CPUs for pagevecs to be drained. This
> makes sense for move_pages and memory hot-remove but is unnecessary
> for memory compaction.
>
> To avoid queueing work on multiple CPUs, this patch introduces
> migrate_prep_local() which drains just local pagevecs.
>
> This patch can be either merged with mmcompaction-memory-compaction-core.patch
> or placed immediately after it to clarify why migrate_prep_local() was
> introduced.
>
> Signed-off-by: Mel Gorman <mel(a)csn.ul.ie>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu(a)jp.fujitsu.com>

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From: Christoph Lameter on 10 May 2010 13:00

Reviewed-by: Christoph Lameter <cl(a)linux-foundation.org>


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