* [PATCH -mm] enable CONFIG_COMPACTION by default
@ 2012-09-13 20:21 Rik van Riel
2012-09-13 20:44 ` Rafael Aquini
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Rik van Riel @ 2012-09-13 20:21 UTC (permalink / raw)
To: linux-mm; +Cc: linux-kernel, Mel Gorman, Andrew Morton
Now that lumpy reclaim has been removed, compaction is the
only way left to free up contiguous memory areas. It is time
to just enable CONFIG_COMPACTION by default.
Signed-off-by: Rik van Riel <riel@redhat.com>
diff --git a/mm/Kconfig b/mm/Kconfig
index d5c8019..32ea0ef 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -191,6 +191,7 @@ config SPLIT_PTLOCK_CPUS
# support for memory compaction
config COMPACTION
bool "Allow for memory compaction"
+ def_bool y
select MIGRATION
depends on MMU
help
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^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH -mm] enable CONFIG_COMPACTION by default
2012-09-13 20:21 [PATCH -mm] enable CONFIG_COMPACTION by default Rik van Riel
@ 2012-09-13 20:44 ` Rafael Aquini
2012-09-13 23:13 ` Johannes Weiner
2012-09-14 0:00 ` Minchan Kim
2 siblings, 0 replies; 4+ messages in thread
From: Rafael Aquini @ 2012-09-13 20:44 UTC (permalink / raw)
To: Rik van Riel; +Cc: linux-mm, linux-kernel, Mel Gorman, Andrew Morton
On Thu, Sep 13, 2012 at 04:21:04PM -0400, Rik van Riel wrote:
> Now that lumpy reclaim has been removed, compaction is the
> only way left to free up contiguous memory areas. It is time
> to just enable CONFIG_COMPACTION by default.
>
> Signed-off-by: Rik van Riel <riel@redhat.com>
>
> diff --git a/mm/Kconfig b/mm/Kconfig
> index d5c8019..32ea0ef 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -191,6 +191,7 @@ config SPLIT_PTLOCK_CPUS
> # support for memory compaction
> config COMPACTION
> bool "Allow for memory compaction"
> + def_bool y
> select MIGRATION
> depends on MMU
> help
>
Acked-by: Rafael Aquini <aquini@redhat.com>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH -mm] enable CONFIG_COMPACTION by default
2012-09-13 20:21 [PATCH -mm] enable CONFIG_COMPACTION by default Rik van Riel
2012-09-13 20:44 ` Rafael Aquini
@ 2012-09-13 23:13 ` Johannes Weiner
2012-09-14 0:00 ` Minchan Kim
2 siblings, 0 replies; 4+ messages in thread
From: Johannes Weiner @ 2012-09-13 23:13 UTC (permalink / raw)
To: Rik van Riel; +Cc: linux-mm, linux-kernel, Mel Gorman, Andrew Morton
On Thu, Sep 13, 2012 at 04:21:04PM -0400, Rik van Riel wrote:
> Now that lumpy reclaim has been removed, compaction is the
> only way left to free up contiguous memory areas. It is time
> to just enable CONFIG_COMPACTION by default.
>
> Signed-off-by: Rik van Riel <riel@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH -mm] enable CONFIG_COMPACTION by default
2012-09-13 20:21 [PATCH -mm] enable CONFIG_COMPACTION by default Rik van Riel
2012-09-13 20:44 ` Rafael Aquini
2012-09-13 23:13 ` Johannes Weiner
@ 2012-09-14 0:00 ` Minchan Kim
2 siblings, 0 replies; 4+ messages in thread
From: Minchan Kim @ 2012-09-14 0:00 UTC (permalink / raw)
To: Rik van Riel; +Cc: linux-mm, linux-kernel, Mel Gorman, Andrew Morton
Hi Rik,
On Thu, Sep 13, 2012 at 04:21:04PM -0400, Rik van Riel wrote:
> Now that lumpy reclaim has been removed, compaction is the
> only way left to free up contiguous memory areas. It is time
> to just enable CONFIG_COMPACTION by default.
>
> Signed-off-by: Rik van Riel <riel@redhat.com>
I tried this a few month ago and Mel had a concern on size
bloating (compaction.o + migration.o) where system doesn't
use higher order allocation.
Now that I think about it, admin should configure carefully
and manually if he has a size concern of vmlinux without
depending auto-generating config.
So I really want this.
Acked-by: Minchan Kim <minchan@kernel.org>
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Kind regards,
Minchan Kim
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-09-13 23:58 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2012-09-13 20:21 [PATCH -mm] enable CONFIG_COMPACTION by default Rik van Riel
2012-09-13 20:44 ` Rafael Aquini
2012-09-13 23:13 ` Johannes Weiner
2012-09-14 0:00 ` Minchan Kim
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