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authorMinchan Kim <minchan.kim@gmail.com>2009-06-16 15:32:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 19:47:42 -0700
commit96cb4df5ddf5e6d5785b5acd4003e3689b87f896 (patch)
treee6bd74df480e9065617aebec29b4285fa021c919 /mm/page_alloc.c
parentbc75d33f0fc1d56e734db1f56d3cfc8097b8e0cf (diff)
downloadconfigs-96cb4df5ddf5e6d5785b5acd4003e3689b87f896.tar.gz
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>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8629c84fd9b..303607f1d32 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4478,22 +4478,26 @@ void setup_per_zone_wmarks(void)
* 1TB 101 10GB
* 10TB 320 32GB
*/
-static void __init setup_per_zone_inactive_ratio(void)
+void calculate_zone_inactive_ratio(struct zone *zone)
{
- struct zone *zone;
+ unsigned int gb, ratio;
- 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 size in gigabytes */
- gb = zone->present_pages >> (30 - PAGE_SHIFT);
- if (gb)
- ratio = int_sqrt(10 * gb);
- else
- ratio = 1;
+ zone->inactive_ratio = ratio;
+}
- zone->inactive_ratio = ratio;
- }
+static void __init setup_per_zone_inactive_ratio(void)
+{
+ struct zone *zone;
+
+ for_each_zone(zone)
+ calculate_zone_inactive_ratio(zone);
}
/*