lkml.org 
[lkml]   [2008]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 9/21] make-get_scan_ratio-to-memcg-safe.patch
Currently, get_scan_ratio() always calculate the balancing value for global reclaim and
memcg reclaim doesn't use it.
Therefore it doesn't have scan_global_lru() condition.

However, we plan to expand get_scan_ratio() to be usable for memcg too, latter.
Then, The dependency code of global reclaim in the get_scan_ratio() insert into
scan_global_lru() condision explictly.


this patch doesn't have any functional change.

Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Index: mmotm-2.6.28-Dec02/mm/vmscan.c
===================================================================
--- mmotm-2.6.28-Dec02.orig/mm/vmscan.c
+++ mmotm-2.6.28-Dec02/mm/vmscan.c
@@ -1430,13 +1430,16 @@ static void get_scan_ratio(struct zone *
zone_nr_pages(zone, sc, LRU_INACTIVE_ANON);
file = zone_nr_pages(zone, sc, LRU_ACTIVE_FILE) +
zone_nr_pages(zone, sc, LRU_INACTIVE_FILE);
- free = zone_page_state(zone, NR_FREE_PAGES);

- /* If we have very few page cache pages, force-scan anon pages. */
- if (unlikely(file + free <= zone->pages_high)) {
- percent[0] = 100;
- percent[1] = 0;
- return;
+ if (scan_global_lru(sc)) {
+ free = zone_page_state(zone, NR_FREE_PAGES);
+ /* If we have very few page cache pages,
+ force-scan anon pages. */
+ if (unlikely(file + free <= zone->pages_high)) {
+ percent[0] = 100;
+ percent[1] = 0;
+ return;
+ }
}

/*


\
 
 \ /
  Last update: 2008-12-03 06:01    [W:0.288 / U:0.444 seconds]
©2003-2014 Jasper Spaans. Advertise on this site