Re: [PATCH] mm,compaction: Do not schedule work on other CPUs forcompaction

[KAMEZAWA Hiroyuki]

On Thu, 6 May 2010 16:08:09 +0100
Mel Gorman <mel@xxxxxxxxx> 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@xxxxxxxxx>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

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