mm: remove MIGRATE_ISOLATE check in hotpath
Several functions test MIGRATE_ISOLATE and some of those are hotpath but
MIGRATE_ISOLATE is used only if we enable CONFIG_MEMORY_ISOLATION(ie,
CMA, memory-hotplug and memory-failure) which are not common config
option. So let's not add unnecessary overhead and code when we don't
enable CONFIG_MEMORY_ISOLATION.
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h
index a92061e..3fff8e7 100644
--- a/include/linux/page-isolation.h
+++ b/include/linux/page-isolation.h
@@ -1,6 +1,25 @@
#ifndef __LINUX_PAGEISOLATION_H
#define __LINUX_PAGEISOLATION_H
+#ifdef CONFIG_MEMORY_ISOLATION
+static inline bool is_migrate_isolate_page(struct page *page)
+{
+ return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
+}
+static inline bool is_migrate_isolate(int migratetype)
+{
+ return migratetype == MIGRATE_ISOLATE;
+}
+#else
+static inline bool is_migrate_isolate_page(struct page *page)
+{
+ return false;
+}
+static inline bool is_migrate_isolate(int migratetype)
+{
+ return false;
+}
+#endif
bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
bool skip_hwpoisoned_pages);