mm-page_alloc-avoid-merging-non-fallbackable-pageblocks-with-others.patch removed from -mm tree

The patch titled
Subject: mm: page_alloc: avoid merging non-fallbackable pageblocks with others
has been removed from the -mm tree. Its filename was
mm-page_alloc-avoid-merging-non-fallbackable-pageblocks-with-others.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Zi Yan <[email protected]>
Subject: mm: page_alloc: avoid merging non-fallbackable pageblocks with others

This is done in addition to MIGRATE_ISOLATE pageblock merge avoidance. It prepares for the upcoming removal of the MAX_ORDER-1 alignment requirement for CMA and alloc_contig_range().

MIGRATE_HIGHATOMIC should not merge with other migratetypes like MIGRATE_ISOLATE and MIGRARTE_CMA[1], so this commit prevents that too.

Remove MIGRATE_CMA and MIGRATE_ISOLATE from fallbacks list, since they are never used.

[1] https://lore.kernel.org/linux-mm/[email protected]/

---

 include/linux/mmzone.h |   11 +++++++++
 mm/page_alloc.c        |   46 ++++++++++++++++++---------------------
 2 files changed, 33 insertions(+), 24 deletions(-)

@@ -83,6 +83,17 @@ static inline bool is_migrate_movable(in
 	return is_migrate_cma(mt) || mt == MIGRATE_MOVABLE;
 }
 
+/*
+ * Check whether a migratetype can be merged with another migratetype.
+ *
+ * It is only mergeable when it can fall back to other migratetypes for
+ * allocation. See fallbacks[MIGRATE_TYPES][3] in page_alloc.c.
+ */
+static inline bool migratetype_is_mergeable(int mt)
+{
+	return mt < MIGRATE_PCPTYPES;
+}
+
 #define for_each_migratetype_order(order, type) \
 	for (order = 0; order < MAX_ORDER; order++) \
 		for (type = 0; type < MIGRATE_TYPES; type++)

_

Patches currently in -mm which might be from [email protected] are