mm: enable CONFIG_COMPACTION by default

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 <[email protected]>
Cc: Mel Gorman <[email protected]>
Acked-by: Rafael Aquini <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Acked-by: Minchan Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/Kconfig b/mm/Kconfig
index 3322342a1ffb0796708e2045571472235e502927..a3f8dddaaab3f08de3bc6c63921be614bbae6736 100644 (file)
--- 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