Messages in this thread Patch in this message | | | From | KOSAKI Motohiro <> | Subject | [PATCH 04/11] make get_scan_ratio() to memcg safe | Date | Mon, 1 Dec 2008 21:14:24 +0900 (JST) |
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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.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> --- mm/vmscan.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-)
Index: b/mm/vmscan.c =================================================================== --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1435,13 +1435,16 @@ 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; + } } /*
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