diff --git a/mm/Kconfig b/mm/Kconfig index 5f4d6e5b5715..c5374f3cf1c8 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -599,17 +599,14 @@ config MEMORY_BALLOON # # support for memory balloon compaction config BALLOON_COMPACTION - bool "Allow for balloon memory compaction/migration" + bool "Allow for balloon memory migration" default y - depends on COMPACTION && MEMORY_BALLOON + depends on MIGRATION && MEMORY_BALLOON help - Memory fragmentation introduced by ballooning might reduce - significantly the number of 2MB contiguous memory blocks that can be - used within a guest, thus imposing performance penalties associated - with the reduced number of transparent huge pages that could be used - by the guest workload. Allowing the compaction & migration for memory - pages enlisted as being part of memory balloon devices avoids the - scenario aforementioned and helps improving memory defragmentation. + Allow for migration of pages inflated in a memory balloon such that + they can be allocated from memory areas only available for movable + allocations (e.g., ZONE_MOVABLE, CMA) and such that they can be + migrated for memory defragmentation purposes by memory compaction. # # support for memory compaction