page-allocator: add inactive ratio calculation function of each zone
Factor the per-zone arithemetic inside setup_per_zone_inactive_ratio()'s
loop into a a separate function, calculate_zone_inactive_ratio(). This
function will be used in a later patch
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 6e11cda..f0473a8 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1053,6 +1053,7 @@
extern void memmap_init_zone(unsigned long, int, unsigned long,
unsigned long, enum memmap_context);
extern void setup_per_zone_wmarks(void);
+extern void calculate_zone_inactive_ratio(struct zone *zone);
extern void mem_init(void);
extern void __init mmap_init(void);
extern void show_mem(void);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8629c84..303607f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4478,22 +4478,26 @@
* 1TB 101 10GB
* 10TB 320 32GB
*/
+void calculate_zone_inactive_ratio(struct zone *zone)
+{
+ unsigned int gb, ratio;
+
+ /* Zone size in gigabytes */
+ gb = zone->present_pages >> (30 - PAGE_SHIFT);
+ if (gb)
+ ratio = int_sqrt(10 * gb);
+ else
+ ratio = 1;
+
+ zone->inactive_ratio = ratio;
+}
+
static void __init setup_per_zone_inactive_ratio(void)
{
struct zone *zone;
- for_each_zone(zone) {
- unsigned int gb, ratio;
-
- /* Zone size in gigabytes */
- gb = zone->present_pages >> (30 - PAGE_SHIFT);
- if (gb)
- ratio = int_sqrt(10 * gb);
- else
- ratio = 1;
-
- zone->inactive_ratio = ratio;
- }
+ for_each_zone(zone)
+ calculate_zone_inactive_ratio(zone);
}
/*