On Fri, 16 Nov 2012, kbuild test robot wrote:
> tree: git://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git since-3.6
> head: 12dfb061e5fd15be23451418da01281625c0eeae
> commit: 86929cfa5f751de3d8be5a846535282730865d8a [365/437] mm: introduce a common interface for balloon pages mobility
> config: make ARCH=sh allyesconfig
>
> All warnings:
>
> warning: (BALLOON_COMPACTION && TRANSPARENT_HUGEPAGE) selects COMPACTION which has unmet direct dependencies (MMU)
> warning: (BALLOON_COMPACTION && TRANSPARENT_HUGEPAGE) selects COMPACTION which has unmet direct dependencies (MMU)
> --
> warning: (BALLOON_COMPACTION && TRANSPARENT_HUGEPAGE) selects COMPACTION which has unmet direct dependencies (MMU)
>
mm: introduce a common interface for balloon pages mobility fix
CONFIG_BALLOON_COMPACTION shouldn't be selecting options that may not be
supported, so make it depend on memory compaction rather than selecting
it. CONFIG_COMPACTION is enabled by default for all configs that support
it.
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
---
mm/Kconfig | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/mm/Kconfig b/mm/Kconfig
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -191,8 +191,7 @@ config SPLIT_PTLOCK_CPUS
# support for memory balloon compaction
config BALLOON_COMPACTION
bool "Allow for balloon memory compaction/migration"
- select COMPACTION
- depends on VIRTIO_BALLOON
+ depends on VIRTIO_BALLOON && COMPACTION
help
Memory fragmentation introduced by ballooning might reduce
significantly the number of 2MB contiguous memory blocks that can be
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