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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2009-01-07 18:08:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 08:31:07 -0800
commit6e9015716ae9b59e9635d692fddfcfb9582c146c (patch)
treee1876d3822c46a20e1c35b41580f5ef6b2f6e053 /mm/vmscan.c
parentf89eb90e33fd4e4e0cc1a6d20afd63c5a561885a (diff)
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mm: introduce zone_reclaim struct
Add zone_reclam_stat struct for later enhancement. A later patch uses this. This patch doesn't any behavior change (yet). Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Hugh Dickins <hugh@veritas.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c47
1 files changed, 30 insertions, 17 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index f75d924cb4f..03ca923c665 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -130,6 +130,12 @@ static DECLARE_RWSEM(shrinker_rwsem);
#define scan_global_lru(sc) (1)
#endif
+static struct zone_reclaim_stat *get_reclaim_stat(struct zone *zone,
+ struct scan_control *sc)
+{
+ return &zone->reclaim_stat;
+}
+
/*
* Add a shrinker callback to be called from the vm
*/
@@ -1029,6 +1035,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
struct pagevec pvec;
unsigned long nr_scanned = 0;
unsigned long nr_reclaimed = 0;
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
pagevec_init(&pvec, 1);
@@ -1072,10 +1079,14 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
if (scan_global_lru(sc)) {
zone->pages_scanned += nr_scan;
- zone->recent_scanned[0] += count[LRU_INACTIVE_ANON];
- zone->recent_scanned[0] += count[LRU_ACTIVE_ANON];
- zone->recent_scanned[1] += count[LRU_INACTIVE_FILE];
- zone->recent_scanned[1] += count[LRU_ACTIVE_FILE];
+ reclaim_stat->recent_scanned[0] +=
+ count[LRU_INACTIVE_ANON];
+ reclaim_stat->recent_scanned[0] +=
+ count[LRU_ACTIVE_ANON];
+ reclaim_stat->recent_scanned[1] +=
+ count[LRU_INACTIVE_FILE];
+ reclaim_stat->recent_scanned[1] +=
+ count[LRU_ACTIVE_FILE];
}
spin_unlock_irq(&zone->lru_lock);
@@ -1136,7 +1147,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
add_page_to_lru_list(zone, page, lru);
if (PageActive(page) && scan_global_lru(sc)) {
int file = !!page_is_file_cache(page);
- zone->recent_rotated[file]++;
+ reclaim_stat->recent_rotated[file]++;
}
if (!pagevec_add(&pvec, page)) {
spin_unlock_irq(&zone->lru_lock);
@@ -1196,6 +1207,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
struct page *page;
struct pagevec pvec;
enum lru_list lru;
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
lru_add_drain();
spin_lock_irq(&zone->lru_lock);
@@ -1208,7 +1220,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
*/
if (scan_global_lru(sc)) {
zone->pages_scanned += pgscanned;
- zone->recent_scanned[!!file] += pgmoved;
+ reclaim_stat->recent_scanned[!!file] += pgmoved;
}
if (file)
@@ -1251,7 +1263,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
* pages in get_scan_ratio.
*/
if (scan_global_lru(sc))
- zone->recent_rotated[!!file] += pgmoved;
+ reclaim_stat->recent_rotated[!!file] += pgmoved;
while (!list_empty(&l_inactive)) {
page = lru_to_page(&l_inactive);
@@ -1344,6 +1356,7 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc,
unsigned long anon, file, free;
unsigned long anon_prio, file_prio;
unsigned long ap, fp;
+ struct zone_reclaim_stat *reclaim_stat = get_reclaim_stat(zone, sc);
/* If we have no swap space, do not bother scanning anon pages. */
if (nr_swap_pages <= 0) {
@@ -1376,17 +1389,17 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc,
*
* anon in [0], file in [1]
*/
- if (unlikely(zone->recent_scanned[0] > anon / 4)) {
+ if (unlikely(reclaim_stat->recent_scanned[0] > anon / 4)) {
spin_lock_irq(&zone->lru_lock);
- zone->recent_scanned[0] /= 2;
- zone->recent_rotated[0] /= 2;
+ reclaim_stat->recent_scanned[0] /= 2;
+ reclaim_stat->recent_rotated[0] /= 2;
spin_unlock_irq(&zone->lru_lock);
}
- if (unlikely(zone->recent_scanned[1] > file / 4)) {
+ if (unlikely(reclaim_stat->recent_scanned[1] > file / 4)) {
spin_lock_irq(&zone->lru_lock);
- zone->recent_scanned[1] /= 2;
- zone->recent_rotated[1] /= 2;
+ reclaim_stat->recent_scanned[1] /= 2;
+ reclaim_stat->recent_rotated[1] /= 2;
spin_unlock_irq(&zone->lru_lock);
}
@@ -1402,11 +1415,11 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc,
* proportional to the fraction of recently scanned pages on
* each list that were recently referenced and in active use.
*/
- ap = (anon_prio + 1) * (zone->recent_scanned[0] + 1);
- ap /= zone->recent_rotated[0] + 1;
+ ap = (anon_prio + 1) * (reclaim_stat->recent_scanned[0] + 1);
+ ap /= reclaim_stat->recent_rotated[0] + 1;
- fp = (file_prio + 1) * (zone->recent_scanned[1] + 1);
- fp /= zone->recent_rotated[1] + 1;
+ fp = (file_prio + 1) * (reclaim_stat->recent_scanned[1] + 1);
+ fp /= reclaim_stat->recent_rotated[1] + 1;
/* Normalize to percentages */
percent[0] = 100 * ap / (ap + fp + 1);