diff options
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index a3f8dddaaab..e6651c5de14 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -188,6 +188,21 @@ config SPLIT_PTLOCK_CPUS default "4" # +# support for memory balloon compaction +config BALLOON_COMPACTION + bool "Allow for balloon memory compaction/migration" + def_bool y + depends on COMPACTION && VIRTIO_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. + +# # support for memory compaction config COMPACTION bool "Allow for memory compaction" |