memcg: move_lists on page not page_cgroup
Each caller of mem_cgroup_move_lists is having to use page_get_page_cgroup:
it's more convenient if it acts upon the page itself not the page_cgroup; and
in a later patch this becomes important to handle within memcontrol.c.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: David Rientjes <rientjes@google.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hirokazu Takahashi <taka@valinux.co.jp>
Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index e4247c8..56432ff 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -36,7 +36,7 @@
gfp_t gfp_mask);
extern void mem_cgroup_uncharge(struct page_cgroup *pc);
extern void mem_cgroup_uncharge_page(struct page *page);
-extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
+extern void mem_cgroup_move_lists(struct page *page, bool active);
extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,
@@ -106,8 +106,7 @@
{
}
-static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
- bool active)
+static inline void mem_cgroup_move_lists(struct page *page, bool active)
{
}
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 41041c0..afdd406 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -407,11 +407,13 @@
/*
* This routine assumes that the appropriate zone's lru lock is already held
*/
-void mem_cgroup_move_lists(struct page_cgroup *pc, bool active)
+void mem_cgroup_move_lists(struct page *page, bool active)
{
+ struct page_cgroup *pc;
struct mem_cgroup_per_zone *mz;
unsigned long flags;
+ pc = page_get_page_cgroup(page);
if (!pc)
return;
diff --git a/mm/swap.c b/mm/swap.c
index 710a20b..d4ec59a 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -176,7 +176,7 @@
SetPageActive(page);
add_page_to_active_list(zone, page);
__count_vm_event(PGACTIVATE);
- mem_cgroup_move_lists(page_get_page_cgroup(page), true);
+ mem_cgroup_move_lists(page, true);
}
spin_unlock_irq(&zone->lru_lock);
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 106ba10..4571158 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1128,7 +1128,7 @@
ClearPageActive(page);
list_move(&page->lru, &zone->inactive_list);
- mem_cgroup_move_lists(page_get_page_cgroup(page), false);
+ mem_cgroup_move_lists(page, false);
pgmoved++;
if (!pagevec_add(&pvec, page)) {
__mod_zone_page_state(zone, NR_INACTIVE, pgmoved);
@@ -1156,8 +1156,9 @@
VM_BUG_ON(PageLRU(page));
SetPageLRU(page);
VM_BUG_ON(!PageActive(page));
+
list_move(&page->lru, &zone->active_list);
- mem_cgroup_move_lists(page_get_page_cgroup(page), true);
+ mem_cgroup_move_lists(page, true);
pgmoved++;
if (!pagevec_add(&pvec, page)) {
__mod_zone_page_state(zone, NR_ACTIVE, pgmoved);