From cd8e95d80bc29b3c72288bd31e845b11755ef6a5 Mon Sep 17 00:00:00 2001 From: "David Hildenbrand (Red Hat)" Date: Tue, 20 Jan 2026 00:01:30 +0100 Subject: mm: rename CONFIG_BALLOON_COMPACTION to CONFIG_BALLOON_MIGRATION MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit While compaction depends on migration, the other direction is not the case. So let's make it clearer that this is all about migration of balloon pages. Adjust all comments/docs in the core to talk about "migration" instead of "compaction". While at it add some "/* CONFIG_BALLOON_MIGRATION */". Link: https://lkml.kernel.org/r/20260119230133.3551867-23-david@kernel.org Signed-off-by: David Hildenbrand (Red Hat) Reviewed-by: Lorenzo Stoakes Acked-by: Michael S. Tsirkin Cc: Arnd Bergmann Cc: Christophe Leroy Cc: Eugenio Pérez Cc: Greg Kroah-Hartman Cc: Jason Wang Cc: Jerrin Shaji George Cc: Jonathan Corbet Cc: Liam Howlett Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Michal Hocko Cc: Mike Rapoport Cc: Nicholas Piggin Cc: Oscar Salvador Cc: SeongJae Park Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Xuan Zhuo Cc: Zi Yan Signed-off-by: Andrew Morton --- include/linux/balloon.h | 12 ++++++------ include/linux/vm_event_item.h | 4 ++-- 2 files changed, 8 insertions(+), 8 deletions(-) (limited to 'include') diff --git a/include/linux/balloon.h b/include/linux/balloon.h index 82585542300d..ca5b15150f42 100644 --- a/include/linux/balloon.h +++ b/include/linux/balloon.h @@ -22,9 +22,9 @@ * * As the page isolation scanning step a compaction thread does is a lockless * procedure (from a page standpoint), it might bring some racy situations while - * performing balloon page compaction. In order to sort out these racy scenarios - * and safely perform balloon's page compaction and migration we must, always, - * ensure following these simple rules: + * performing balloon page migration. In order to sort out these racy scenarios + * and safely perform balloon's page migration we must, always, ensure following + * these simple rules: * * i. Inflation/deflation must set/clear page->private under the * balloon_pages_lock @@ -45,10 +45,10 @@ /* * Balloon device information descriptor. - * This struct is used to allow the common balloon compaction interface + * This struct is used to allow the common balloon page migration interface * procedures to find the proper balloon device holding memory pages they'll - * have to cope for page compaction / migration, as well as it serves the - * balloon driver as a page book-keeper for its registered balloon devices. + * have to cope for page migration, as well as it serves the balloon driver as + * a page book-keeper for its registered balloon devices. */ struct balloon_dev_info { unsigned long isolated_pages; /* # of isolated pages for migration */ diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h index 92f80b4d69a6..fca34d3473b6 100644 --- a/include/linux/vm_event_item.h +++ b/include/linux/vm_event_item.h @@ -125,9 +125,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, #ifdef CONFIG_MEMORY_BALLOON BALLOON_INFLATE, BALLOON_DEFLATE, -#ifdef CONFIG_BALLOON_COMPACTION +#ifdef CONFIG_BALLOON_MIGRATION BALLOON_MIGRATE, -#endif +#endif /* CONFIG_BALLOON_MIGRATION */ #endif #ifdef CONFIG_DEBUG_TLBFLUSH NR_TLB_REMOTE_FLUSH, /* cpu tried to flush others' tlbs */ -- cgit v1.2.3