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authorMinchan Kim <minchan.kim@gmail.com>2009-06-16 18:32:49 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 22:47:42 -0400
commit96cb4df5ddf5e6d5785b5acd4003e3689b87f896 (patch)
treee6bd74df480e9065617aebec29b4285fa021c919 /mm/page_alloc.c
parentbc75d33f0fc1d56e734db1f56d3cfc8097b8e0cf (diff)
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 8629c84fd9ba..303607f1d323 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4478,22 +4478,26 @@ void setup_per_zone_wmarks(void)
4478 * 1TB 101 10GB 4478 * 1TB 101 10GB
4479 * 10TB 320 32GB 4479 * 10TB 320 32GB
4480 */ 4480 */
4481static void __init setup_per_zone_inactive_ratio(void) 4481void calculate_zone_inactive_ratio(struct zone *zone)
4482{ 4482{
4483 struct zone *zone; 4483 unsigned int gb, ratio;
4484 4484
4485 for_each_zone(zone) { 4485 /* Zone size in gigabytes */
4486 unsigned int gb, ratio; 4486 gb = zone->present_pages >> (30 - PAGE_SHIFT);
4487 if (gb)
4488 ratio = int_sqrt(10 * gb);
4489 else
4490 ratio = 1;
4487 4491
4488 /* Zone size in gigabytes */ 4492 zone->inactive_ratio = ratio;
4489 gb = zone->present_pages >> (30 - PAGE_SHIFT); 4493}
4490 if (gb)
4491 ratio = int_sqrt(10 * gb);
4492 else
4493 ratio = 1;
4494 4494
4495 zone->inactive_ratio = ratio; 4495static void __init setup_per_zone_inactive_ratio(void)
4496 } 4496{
4497 struct zone *zone;
4498
4499 for_each_zone(zone)
4500 calculate_zone_inactive_ratio(zone);
4497} 4501}
4498 4502
4499/* 4503/*