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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2009-06-17 16:27:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:03:48 -0700
commit2ffebca6aa7e1687905c842dd8c5c1e811e574e7 (patch)
tree93ec4e18c54289e82dcc8e602c166d5ffee50ef8 /mm
parentc5b947b28828e82814605824e5db0bc58d66d8c0 (diff)
downloadlinux-2ffebca6aa7e1687905c842dd8c5c1e811e574e7.tar.gz
memcg: fix lru rotation in isolate_pages
Try to fix memcg's lru rotation sanity: make memcg use the same logic as the global LRU does. Now, at __isolate_lru_page() retruns -EBUSY, the page is rotated to the tail of LRU in global LRU's isolate LRU pages. But in memcg, it's not handled. This makes memcg do the same behavior as global LRU and rotate LRU in the page is busy. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c13
-rw-r--r--mm/vmscan.c4
2 files changed, 15 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6ceb6f2dbac..e2fa20dadf4 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -649,6 +649,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
int zid = zone_idx(z);
struct mem_cgroup_per_zone *mz;
int lru = LRU_FILE * !!file + !!active;
+ int ret;
BUG_ON(!mem_cont);
mz = mem_cgroup_zoneinfo(mem_cont, nid, zid);
@@ -666,9 +667,19 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
continue;
scan++;
- if (__isolate_lru_page(page, mode, file) == 0) {
+ ret = __isolate_lru_page(page, mode, file);
+ switch (ret) {
+ case 0:
list_move(&page->lru, dst);
+ mem_cgroup_del_lru(page);
nr_taken++;
+ break;
+ case -EBUSY:
+ /* we don't affect global LRU but rotate in our LRU */
+ mem_cgroup_rotate_lru_list(page, page_lru(page));
+ break;
+ default:
+ break;
}
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4139aa52b94..e8fa2d9eb21 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -837,7 +837,6 @@ int __isolate_lru_page(struct page *page, int mode, int file)
*/
ClearPageLRU(page);
ret = 0;
- mem_cgroup_del_lru(page);
}
return ret;
@@ -885,12 +884,14 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
switch (__isolate_lru_page(page, mode, file)) {
case 0:
list_move(&page->lru, dst);
+ mem_cgroup_del_lru(page);
nr_taken++;
break;
case -EBUSY:
/* else it is being freed elsewhere */
list_move(&page->lru, src);
+ mem_cgroup_rotate_lru_list(page, page_lru(page));
continue;
default:
@@ -931,6 +932,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
continue;
if (__isolate_lru_page(cursor_page, mode, file) == 0) {
list_move(&cursor_page->lru, dst);
+ mem_cgroup_del_lru(page);
nr_taken++;
scan++;
}