Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo

[linux-2.6-block.git] / include / linux / mmzone.h

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 87a4045580f2789a636ad7782befa14b3110cca8..20ea42c45e4adde226432a755c323a390bd88232 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -43,6 +43,16 @@
        for (order = 0; order < MAX_ORDER; order++) \
                for (type = 0; type < MIGRATE_TYPES; type++)
 
+extern int page_group_by_mobility_disabled;
+
+static inline int get_pageblock_migratetype(struct page *page)
+{
+       if (unlikely(page_group_by_mobility_disabled))
+               return MIGRATE_UNMOVABLE;
+
+       return get_pageblock_flags_group(page, PB_migrate, PB_migrate_end);
+}
+
 struct free_area {
        struct list_head        free_list[MIGRATE_TYPES];
        unsigned long           nr_free;