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Subject[PATCH 4/10] mm/memcg: apply add/del_page to lruvec
Go further: pass lruvec instead of zone to add_page_to_lru_list() and
del_page_from_lru_list(); and pagevec_lru_move_fn() pass lruvec down
to its target functions.

This cleanup eliminates a swathe of cruft in memcontrol.c,
including mem_cgroup_lru_add_list(), mem_cgroup_lru_del_list() and
mem_cgroup_lru_move_lists(), which never actually touched the lists.

In their place, mem_cgroup_page_lruvec() to decide the lruvec,
previously a side-effect of add, and mem_cgroup_update_lru_size()
to maintain the lru_size stats.

Whilst these are simplifications in their own right, the goal is to
bring the evaluation of lruvec next to the spin_locking of the lrus,
in preparation for the next patch.

Signed-off-by: Hugh Dickins <hughd@google.com>
---
include/linux/memcontrol.h | 40 ++-----------
include/linux/mm_inline.h | 20 +++---
include/linux/swap.h | 4 -
mm/compaction.c | 5 +
mm/huge_memory.c | 5 +
mm/memcontrol.c | 102 +++++++----------------------------
mm/swap.c | 85 ++++++++++++++---------------
mm/vmscan.c | 60 ++++++++++++--------
8 files changed, 128 insertions(+), 193 deletions(-)

--- mmotm.orig/include/linux/memcontrol.h 2012-02-18 11:57:28.371524252 -0800
+++ mmotm/include/linux/memcontrol.h 2012-02-18 11:57:35.583524425 -0800
@@ -63,13 +63,9 @@ extern int mem_cgroup_cache_charge(struc
gfp_t gfp_mask);

struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
+extern struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
extern struct mem_cgroup *mem_cgroup_from_lruvec(struct lruvec *lruvec);
-struct lruvec *mem_cgroup_lru_add_list(struct zone *, struct page *,
- enum lru_list);
-void mem_cgroup_lru_del_list(struct page *, enum lru_list);
-void mem_cgroup_lru_del(struct page *);
-struct lruvec *mem_cgroup_lru_move_lists(struct zone *, struct page *,
- enum lru_list, enum lru_list);
+extern void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int);

/* For coalescing uncharge for reducing memcg' overhead*/
extern void mem_cgroup_uncharge_start(void);
@@ -119,8 +115,6 @@ int mem_cgroup_inactive_file_is_low(stru
int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
unsigned long mem_cgroup_zone_nr_lru_pages(struct lruvec *lruvec,
unsigned int lrumask);
-struct zone_reclaim_stat*
-mem_cgroup_get_reclaim_stat_from_page(struct page *page);
extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
struct task_struct *p);
extern void mem_cgroup_replace_page_cache(struct page *oldpage,
@@ -248,32 +242,20 @@ static inline struct lruvec *mem_cgroup_
return &zone->lruvec;
}

-static inline struct mem_cgroup *mem_cgroup_from_lruvec(struct lruvec *lruvec)
-{
- return NULL;
-}
-
-static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone,
- struct page *page,
- enum lru_list lru)
+static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
+ struct zone *zone)
{
return &zone->lruvec;
}

-static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
-{
-}
-
-static inline void mem_cgroup_lru_del(struct page *page)
+static inline struct mem_cgroup *mem_cgroup_from_lruvec(struct lruvec *lruvec)
{
+ return NULL;
}

-static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
- struct page *page,
- enum lru_list from,
- enum lru_list to)
+static inline void mem_cgroup_update_lru_size(struct lruvec *lruvec,
+ enum lru_list lru, int increment)
{
- return &zone->lruvec;
}

static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
@@ -352,12 +334,6 @@ mem_cgroup_zone_nr_lru_pages(struct lruv
return 0;
}

-static inline struct zone_reclaim_stat*
-mem_cgroup_get_reclaim_stat_from_page(struct page *page)
-{
- return NULL;
-}
-
static inline void
mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
--- mmotm.orig/include/linux/mm_inline.h 2012-02-18 11:56:23.639522714 -0800
+++ mmotm/include/linux/mm_inline.h 2012-02-18 11:57:35.583524425 -0800
@@ -21,22 +21,22 @@ static inline int page_is_file_cache(str
return !PageSwapBacked(page);
}

-static inline void
-add_page_to_lru_list(struct zone *zone, struct page *page, enum lru_list lru)
+static inline void add_page_to_lru_list(struct page *page,
+ struct lruvec *lruvec, enum lru_list lru)
{
- struct lruvec *lruvec;
-
- lruvec = mem_cgroup_lru_add_list(zone, page, lru);
+ int nr_pages = hpage_nr_pages(page);
+ mem_cgroup_update_lru_size(lruvec, lru, nr_pages);
list_add(&page->lru, &lruvec->lists[lru]);
- __mod_zone_page_state(zone, NR_LRU_BASE + lru, hpage_nr_pages(page));
+ __mod_zone_page_state(lruvec->zone, NR_LRU_BASE + lru, nr_pages);
}

-static inline void
-del_page_from_lru_list(struct zone *zone, struct page *page, enum lru_list lru)
+static inline void del_page_from_lru_list(struct page *page,
+ struct lruvec *lruvec, enum lru_list lru)
{
- mem_cgroup_lru_del_list(page, lru);
+ int nr_pages = hpage_nr_pages(page);
+ mem_cgroup_update_lru_size(lruvec, lru, -nr_pages);
list_del(&page->lru);
- __mod_zone_page_state(zone, NR_LRU_BASE + lru, -hpage_nr_pages(page));
+ __mod_zone_page_state(lruvec->zone, NR_LRU_BASE + lru, -nr_pages);
}

/**
--- mmotm.orig/include/linux/swap.h 2012-02-18 11:56:23.639522714 -0800
+++ mmotm/include/linux/swap.h 2012-02-18 11:57:35.583524425 -0800
@@ -224,8 +224,8 @@ extern unsigned int nr_free_pagecache_pa
/* linux/mm/swap.c */
extern void __lru_cache_add(struct page *, enum lru_list lru);
extern void lru_cache_add_lru(struct page *, enum lru_list lru);
-extern void lru_add_page_tail(struct zone* zone,
- struct page *page, struct page *page_tail);
+extern void lru_add_page_tail(struct page *page, struct page *page_tail,
+ struct lruvec *lruvec);
extern void activate_page(struct page *);
extern void mark_page_accessed(struct page *);
extern void lru_add_drain(void);
--- mmotm.orig/mm/compaction.c 2012-02-18 11:56:23.639522714 -0800
+++ mmotm/mm/compaction.c 2012-02-18 11:57:35.583524425 -0800
@@ -262,6 +262,7 @@ static isolate_migrate_t isolate_migrate
unsigned long nr_scanned = 0, nr_isolated = 0;
struct list_head *migratelist = &cc->migratepages;
isolate_mode_t mode = ISOLATE_ACTIVE|ISOLATE_INACTIVE;
+ struct lruvec *lruvec;

/* Do not scan outside zone boundaries */
low_pfn = max(cc->migrate_pfn, zone->zone_start_pfn);
@@ -378,10 +379,12 @@ static isolate_migrate_t isolate_migrate
if (__isolate_lru_page(page, mode, 0) != 0)
continue;

+ lruvec = mem_cgroup_page_lruvec(page, zone);
+
VM_BUG_ON(PageTransCompound(page));

/* Successfully isolated */
- del_page_from_lru_list(zone, page, page_lru(page));
+ del_page_from_lru_list(page, lruvec, page_lru(page));
list_add(&page->lru, migratelist);
cc->nr_migratepages++;
nr_isolated++;
--- mmotm.orig/mm/huge_memory.c 2012-02-18 11:56:23.639522714 -0800
+++ mmotm/mm/huge_memory.c 2012-02-18 11:57:35.583524425 -0800
@@ -1223,10 +1223,13 @@ static void __split_huge_page_refcount(s
{
int i;
struct zone *zone = page_zone(page);
+ struct lruvec *lruvec;
int tail_count = 0;

/* prevent PageLRU to go away from under us, and freeze lru stats */
spin_lock_irq(&zone->lru_lock);
+ lruvec = mem_cgroup_page_lruvec(page, zone);
+
compound_lock(page);
/* complete memcg works before add pages to LRU */
mem_cgroup_split_huge_fixup(page);
@@ -1302,7 +1305,7 @@ static void __split_huge_page_refcount(s
BUG_ON(!PageSwapBacked(page_tail));


- lru_add_page_tail(zone, page, page_tail);
+ lru_add_page_tail(page, page_tail, lruvec);
}
atomic_sub(tail_count, &page->_count);
BUG_ON(atomic_read(&page->_count) <= 0);
--- mmotm.orig/mm/memcontrol.c 2012-02-18 11:57:28.371524252 -0800
+++ mmotm/mm/memcontrol.c 2012-02-18 11:57:35.587524424 -0800
@@ -993,7 +993,7 @@ EXPORT_SYMBOL(mem_cgroup_count_vm_event)
/**
* mem_cgroup_zone_lruvec - get the lru list vector for a zone and memcg
* @zone: zone of the wanted lruvec
- * @mem: memcg of the wanted lruvec
+ * @memcg: memcg of the wanted lruvec
*
* Returns the lru list vector holding pages for the given @zone and
* @mem. This can be the global zone lruvec, if the memory controller
@@ -1037,19 +1037,11 @@ struct mem_cgroup *mem_cgroup_from_lruve
*/

/**
- * mem_cgroup_lru_add_list - account for adding an lru page and return lruvec
- * @zone: zone of the page
+ * mem_cgroup_page_lruvec - return lruvec for adding an lru page
* @page: the page
- * @lru: current lru
- *
- * This function accounts for @page being added to @lru, and returns
- * the lruvec for the given @zone and the memcg @page is charged to.
- *
- * The callsite is then responsible for physically linking the page to
- * the returned lruvec->lists[@lru].
+ * @zone: zone of the page
*/
-struct lruvec *mem_cgroup_lru_add_list(struct zone *zone, struct page *page,
- enum lru_list lru)
+struct lruvec *mem_cgroup_page_lruvec(struct page *page, struct zone *zone)
{
struct mem_cgroup_per_zone *mz;
struct mem_cgroup *memcg;
@@ -1061,66 +1053,31 @@ struct lruvec *mem_cgroup_lru_add_list(s
pc = lookup_page_cgroup(page);
memcg = pc->mem_cgroup;
mz = page_cgroup_zoneinfo(memcg, page);
- /* compound_order() is stabilized through lru_lock */
- mz->lru_size[lru] += 1 << compound_order(page);
return &mz->lruvec;
}

/**
- * mem_cgroup_lru_del_list - account for removing an lru page
- * @page: the page
- * @lru: target lru
- *
- * This function accounts for @page being removed from @lru.
+ * mem_cgroup_update_lru_size - account for adding or removing an lru page
+ * @lruvec: mem_cgroup per zone lru vector
+ * @lru: index of lru list the page is sitting on
+ * @nr_pages: positive when adding or negative when removing
*
- * The callsite is then responsible for physically unlinking
- * @page->lru.
+ * This function must be called when a page is added to or removed from an
+ * lru list.
*/
-void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
+void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
+ int nr_pages)
{
struct mem_cgroup_per_zone *mz;
- struct mem_cgroup *memcg;
- struct page_cgroup *pc;
+ unsigned long *lru_size;

if (mem_cgroup_disabled())
return;

- pc = lookup_page_cgroup(page);
- memcg = pc->mem_cgroup;
- VM_BUG_ON(!memcg);
- mz = page_cgroup_zoneinfo(memcg, page);
- /* huge page split is done under lru_lock. so, we have no races. */
- VM_BUG_ON(mz->lru_size[lru] < (1 << compound_order(page)));
- mz->lru_size[lru] -= 1 << compound_order(page);
-}
-
-void mem_cgroup_lru_del(struct page *page)
-{
- mem_cgroup_lru_del_list(page, page_lru(page));
-}
-
-/**
- * mem_cgroup_lru_move_lists - account for moving a page between lrus
- * @zone: zone of the page
- * @page: the page
- * @from: current lru
- * @to: target lru
- *
- * This function accounts for @page being moved between the lrus @from
- * and @to, and returns the lruvec for the given @zone and the memcg
- * @page is charged to.
- *
- * The callsite is then responsible for physically relinking
- * @page->lru to the returned lruvec->lists[@to].
- */
-struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
- struct page *page,
- enum lru_list from,
- enum lru_list to)
-{
- /* XXX: Optimize this, especially for @from == @to */
- mem_cgroup_lru_del_list(page, from);
- return mem_cgroup_lru_add_list(zone, page, to);
+ mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec);
+ lru_size = mz->lru_size + lru;
+ *lru_size += nr_pages;
+ VM_BUG_ON((long)(*lru_size) < 0);
}

/*
@@ -1203,24 +1160,6 @@ int mem_cgroup_inactive_file_is_low(stru
return (active > inactive);
}

-struct zone_reclaim_stat *
-mem_cgroup_get_reclaim_stat_from_page(struct page *page)
-{
- struct page_cgroup *pc;
- struct mem_cgroup_per_zone *mz;
-
- if (mem_cgroup_disabled())
- return NULL;
-
- pc = lookup_page_cgroup(page);
- if (!PageCgroupUsed(pc))
- return NULL;
- /* Ensure pc->mem_cgroup is visible after reading PCG_USED. */
- smp_rmb();
- mz = page_cgroup_zoneinfo(pc->mem_cgroup, page);
- return &mz->lruvec.reclaim_stat;
-}
-
#define mem_cgroup_from_res_counter(counter, member) \
container_of(counter, struct mem_cgroup, member)

@@ -2695,6 +2634,7 @@ __mem_cgroup_commit_charge_lrucare(struc
struct zone *zone = page_zone(page);
unsigned long flags;
bool removed = false;
+ struct lruvec *lruvec;

/*
* In some case, SwapCache, FUSE(splice_buf->radixtree), the page
@@ -2703,13 +2643,15 @@ __mem_cgroup_commit_charge_lrucare(struc
*/
spin_lock_irqsave(&zone->lru_lock, flags);
if (PageLRU(page)) {
- del_page_from_lru_list(zone, page, page_lru(page));
+ lruvec = mem_cgroup_zone_lruvec(zone, pc->mem_cgroup);
+ del_page_from_lru_list(page, lruvec, page_lru(page));
ClearPageLRU(page);
removed = true;
}
__mem_cgroup_commit_charge(memcg, page, 1, pc, ctype);
if (removed) {
- add_page_to_lru_list(zone, page, page_lru(page));
+ lruvec = mem_cgroup_zone_lruvec(zone, pc->mem_cgroup);
+ add_page_to_lru_list(page, lruvec, page_lru(page));
SetPageLRU(page);
}
spin_unlock_irqrestore(&zone->lru_lock, flags);
--- mmotm.orig/mm/swap.c 2012-02-18 11:57:20.395524062 -0800
+++ mmotm/mm/swap.c 2012-02-18 11:57:35.587524424 -0800
@@ -47,13 +47,15 @@ static DEFINE_PER_CPU(struct pagevec, lr
static void __page_cache_release(struct page *page)
{
if (PageLRU(page)) {
- unsigned long flags;
struct zone *zone = page_zone(page);
+ struct lruvec *lruvec;
+ unsigned long flags;

spin_lock_irqsave(&zone->lru_lock, flags);
+ lruvec = mem_cgroup_page_lruvec(page, zone);
VM_BUG_ON(!PageLRU(page));
__ClearPageLRU(page);
- del_page_from_lru_list(zone, page, page_off_lru(page));
+ del_page_from_lru_list(page, lruvec, page_off_lru(page));
spin_unlock_irqrestore(&zone->lru_lock, flags);
}
}
@@ -202,11 +204,12 @@ void put_pages_list(struct list_head *pa
EXPORT_SYMBOL(put_pages_list);

static void pagevec_lru_move_fn(struct pagevec *pvec,
- void (*move_fn)(struct page *page, void *arg),
- void *arg)
+ void (*move_fn)(struct page *page, struct lruvec *lruvec, void *arg),
+ void *arg)
{
int i;
struct zone *zone = NULL;
+ struct lruvec *lruvec;
unsigned long flags = 0;

for (i = 0; i < pagevec_count(pvec); i++) {
@@ -220,7 +223,8 @@ static void pagevec_lru_move_fn(struct p
spin_lock_irqsave(&zone->lru_lock, flags);
}

- (*move_fn)(page, arg);
+ lruvec = mem_cgroup_page_lruvec(page, zone);
+ (*move_fn)(page, lruvec, arg);
}
if (zone)
spin_unlock_irqrestore(&zone->lru_lock, flags);
@@ -228,16 +232,13 @@ static void pagevec_lru_move_fn(struct p
pagevec_reinit(pvec);
}

-static void pagevec_move_tail_fn(struct page *page, void *arg)
+static void pagevec_move_tail_fn(struct page *page, struct lruvec *lruvec,
+ void *arg)
{
int *pgmoved = arg;

if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
enum lru_list lru = page_lru_base_type(page);
- struct lruvec *lruvec;
-
- lruvec = mem_cgroup_lru_move_lists(page_zone(page),
- page, lru, lru);
list_move_tail(&page->lru, &lruvec->lists[lru]);
(*pgmoved)++;
}
@@ -276,35 +277,30 @@ void rotate_reclaimable_page(struct page
}
}

-static void update_page_reclaim_stat(struct zone *zone, struct page *page,
+static void update_page_reclaim_stat(struct lruvec *lruvec,
int file, int rotated)
{
- struct zone_reclaim_stat *reclaim_stat;
-
- reclaim_stat = mem_cgroup_get_reclaim_stat_from_page(page);
- if (!reclaim_stat)
- reclaim_stat = &zone->lruvec.reclaim_stat;
+ struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat;

reclaim_stat->recent_scanned[file]++;
if (rotated)
reclaim_stat->recent_rotated[file]++;
}

-static void __activate_page(struct page *page, void *arg)
+static void __activate_page(struct page *page, struct lruvec *lruvec,
+ void *arg)
{
- struct zone *zone = page_zone(page);
-
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
int file = page_is_file_cache(page);
int lru = page_lru_base_type(page);
- del_page_from_lru_list(zone, page, lru);

+ del_page_from_lru_list(page, lruvec, lru);
SetPageActive(page);
lru += LRU_ACTIVE;
- add_page_to_lru_list(zone, page, lru);
- __count_vm_event(PGACTIVATE);
+ add_page_to_lru_list(page, lruvec, lru);

- update_page_reclaim_stat(zone, page, file, 1);
+ __count_vm_event(PGACTIVATE);
+ update_page_reclaim_stat(lruvec, file, 1);
}
}

@@ -341,7 +337,7 @@ void activate_page(struct page *page)
struct zone *zone = page_zone(page);

spin_lock_irq(&zone->lru_lock);
- __activate_page(page, NULL);
+ __activate_page(page, mem_cgroup_page_lruvec(page, zone), NULL);
spin_unlock_irq(&zone->lru_lock);
}
#endif
@@ -408,11 +404,13 @@ void lru_cache_add_lru(struct page *page
void add_page_to_unevictable_list(struct page *page)
{
struct zone *zone = page_zone(page);
+ struct lruvec *lruvec;

spin_lock_irq(&zone->lru_lock);
+ lruvec = mem_cgroup_page_lruvec(page, zone);
SetPageUnevictable(page);
SetPageLRU(page);
- add_page_to_lru_list(zone, page, LRU_UNEVICTABLE);
+ add_page_to_lru_list(page, lruvec, LRU_UNEVICTABLE);
spin_unlock_irq(&zone->lru_lock);
}

@@ -437,11 +435,11 @@ void add_page_to_unevictable_list(struct
* be write it out by flusher threads as this is much more effective
* than the single-page writeout from reclaim.
*/
-static void lru_deactivate_fn(struct page *page, void *arg)
+static void lru_deactivate_fn(struct page *page, struct lruvec *lruvec,
+ void *arg)
{
int lru, file;
bool active;
- struct zone *zone = page_zone(page);

if (!PageLRU(page))
return;
@@ -454,13 +452,13 @@ static void lru_deactivate_fn(struct pag
return;

active = PageActive(page);
-
file = page_is_file_cache(page);
lru = page_lru_base_type(page);
- del_page_from_lru_list(zone, page, lru + active);
+
+ del_page_from_lru_list(page, lruvec, lru + active);
ClearPageActive(page);
ClearPageReferenced(page);
- add_page_to_lru_list(zone, page, lru);
+ add_page_to_lru_list(page, lruvec, lru);

if (PageWriteback(page) || PageDirty(page)) {
/*
@@ -470,19 +468,17 @@ static void lru_deactivate_fn(struct pag
*/
SetPageReclaim(page);
} else {
- struct lruvec *lruvec;
/*
* The page's writeback ends up during pagevec
* We moves tha page into tail of inactive.
*/
- lruvec = mem_cgroup_lru_move_lists(zone, page, lru, lru);
list_move_tail(&page->lru, &lruvec->lists[lru]);
__count_vm_event(PGROTATED);
}

if (active)
__count_vm_event(PGDEACTIVATE);
- update_page_reclaim_stat(zone, page, file, 0);
+ update_page_reclaim_stat(lruvec, file, 0);
}

/*
@@ -582,6 +578,7 @@ void release_pages(struct page **pages,
int i;
LIST_HEAD(pages_to_free);
struct zone *zone = NULL;
+ struct lruvec *lruvec;
unsigned long uninitialized_var(flags);

for (i = 0; i < nr; i++) {
@@ -609,9 +606,11 @@ void release_pages(struct page **pages,
zone = pagezone;
spin_lock_irqsave(&zone->lru_lock, flags);
}
+
+ lruvec = mem_cgroup_page_lruvec(page, zone);
VM_BUG_ON(!PageLRU(page));
__ClearPageLRU(page);
- del_page_from_lru_list(zone, page, page_off_lru(page));
+ del_page_from_lru_list(page, lruvec, page_off_lru(page));
}

list_add(&page->lru, &pages_to_free);
@@ -643,8 +642,8 @@ EXPORT_SYMBOL(__pagevec_release);

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
/* used by __split_huge_page_refcount() */
-void lru_add_page_tail(struct zone* zone,
- struct page *page, struct page *page_tail)
+void lru_add_page_tail(struct page *page, struct page *page_tail,
+ struct lruvec *lruvec)
{
int active;
enum lru_list lru;
@@ -653,7 +652,7 @@ void lru_add_page_tail(struct zone* zone
VM_BUG_ON(!PageHead(page));
VM_BUG_ON(PageCompound(page_tail));
VM_BUG_ON(PageLRU(page_tail));
- VM_BUG_ON(NR_CPUS != 1 && !spin_is_locked(&zone->lru_lock));
+ VM_BUG_ON(NR_CPUS != 1 && !spin_is_locked(&lruvec->zone->lru_lock));

SetPageLRU(page_tail);

@@ -666,7 +665,7 @@ void lru_add_page_tail(struct zone* zone
active = 0;
lru = LRU_INACTIVE_ANON;
}
- update_page_reclaim_stat(zone, page_tail, file, active);
+ update_page_reclaim_stat(lruvec, file, active);
} else {
SetPageUnevictable(page_tail);
lru = LRU_UNEVICTABLE;
@@ -683,17 +682,17 @@ void lru_add_page_tail(struct zone* zone
* Use the standard add function to put page_tail on the list,
* but then correct its position so they all end up in order.
*/
- add_page_to_lru_list(zone, page_tail, lru);
+ add_page_to_lru_list(page_tail, lruvec, lru);
list_head = page_tail->lru.prev;
list_move_tail(&page_tail->lru, list_head);
}
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */

-static void __pagevec_lru_add_fn(struct page *page, void *arg)
+static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec,
+ void *arg)
{
enum lru_list lru = (enum lru_list)arg;
- struct zone *zone = page_zone(page);
int file = is_file_lru(lru);
int active = is_active_lru(lru);

@@ -704,8 +703,8 @@ static void __pagevec_lru_add_fn(struct
SetPageLRU(page);
if (active)
SetPageActive(page);
- update_page_reclaim_stat(zone, page, file, active);
- add_page_to_lru_list(zone, page, lru);
+ update_page_reclaim_stat(lruvec, file, active);
+ add_page_to_lru_list(page, lruvec, lru);
}

/*
--- mmotm.orig/mm/vmscan.c 2012-02-18 11:57:28.375524252 -0800
+++ mmotm/mm/vmscan.c 2012-02-18 11:57:35.587524424 -0800
@@ -1124,6 +1124,7 @@ static unsigned long isolate_lru_pages(u
unsigned long *nr_scanned, struct scan_control *sc,
isolate_mode_t mode, int active, int file)
{
+ struct lruvec *home_lruvec = lruvec;
struct list_head *src;
unsigned long nr_taken = 0;
unsigned long nr_lumpy_taken = 0;
@@ -1140,6 +1141,7 @@ static unsigned long isolate_lru_pages(u

for (scan = 0; scan < nr_to_scan && !list_empty(src); scan++) {
struct page *page;
+ int isolated_pages;
unsigned long pfn;
unsigned long end_pfn;
unsigned long page_pfn;
@@ -1152,9 +1154,10 @@ static unsigned long isolate_lru_pages(u

switch (__isolate_lru_page(page, mode, file)) {
case 0:
- mem_cgroup_lru_del(page);
+ isolated_pages = hpage_nr_pages(page);
+ mem_cgroup_update_lru_size(lruvec, lru, -isolated_pages);
list_move(&page->lru, dst);
- nr_taken += hpage_nr_pages(page);
+ nr_taken += isolated_pages;
break;

case -EBUSY:
@@ -1209,11 +1212,13 @@ static unsigned long isolate_lru_pages(u
break;

if (__isolate_lru_page(cursor_page, mode, file) == 0) {
- unsigned int isolated_pages;
-
- mem_cgroup_lru_del(cursor_page);
- list_move(&cursor_page->lru, dst);
+ lruvec = mem_cgroup_page_lruvec(cursor_page,
+ lruvec->zone);
isolated_pages = hpage_nr_pages(cursor_page);
+ mem_cgroup_update_lru_size(lruvec,
+ page_lru(cursor_page), -isolated_pages);
+ list_move(&cursor_page->lru, dst);
+
nr_taken += isolated_pages;
nr_lumpy_taken += isolated_pages;
if (PageDirty(cursor_page))
@@ -1243,6 +1248,8 @@ static unsigned long isolate_lru_pages(u
/* If we break out of the loop above, lumpy reclaim failed */
if (pfn < end_pfn)
nr_lumpy_failed++;
+
+ lruvec = home_lruvec;
}

*nr_scanned = scan;
@@ -1288,15 +1295,16 @@ int isolate_lru_page(struct page *page)

if (PageLRU(page)) {
struct zone *zone = page_zone(page);
+ struct lruvec *lruvec;

spin_lock_irq(&zone->lru_lock);
+ lruvec = mem_cgroup_page_lruvec(page, zone);
if (PageLRU(page)) {
int lru = page_lru(page);
- ret = 0;
get_page(page);
ClearPageLRU(page);
-
- del_page_from_lru_list(zone, page, lru);
+ del_page_from_lru_list(page, lruvec, lru);
+ ret = 0;
}
spin_unlock_irq(&zone->lru_lock);
}
@@ -1350,9 +1358,13 @@ putback_inactive_pages(struct lruvec *lr
spin_lock_irq(&zone->lru_lock);
continue;
}
+
+ lruvec = mem_cgroup_page_lruvec(page, zone);
+
SetPageLRU(page);
lru = page_lru(page);
- add_page_to_lru_list(zone, page, lru);
+ add_page_to_lru_list(page, lruvec, lru);
+
if (is_active_lru(lru)) {
int file = is_file_lru(lru);
int numpages = hpage_nr_pages(page);
@@ -1361,7 +1373,7 @@ putback_inactive_pages(struct lruvec *lr
if (put_page_testzero(page)) {
__ClearPageLRU(page);
__ClearPageActive(page);
- del_page_from_lru_list(zone, page, lru);
+ del_page_from_lru_list(page, lruvec, lru);

if (unlikely(PageCompound(page))) {
spin_unlock_irq(&zone->lru_lock);
@@ -1599,30 +1611,32 @@ shrink_inactive_list(unsigned long nr_to
* But we had to alter page->flags anyway.
*/

-static void move_active_pages_to_lru(struct zone *zone,
+static void move_active_pages_to_lru(struct lruvec *lruvec,
struct list_head *list,
struct list_head *pages_to_free,
enum lru_list lru)
{
+ struct zone *zone = lruvec->zone;
unsigned long pgmoved = 0;
struct page *page;
+ int nr_pages;

while (!list_empty(list)) {
- struct lruvec *lruvec;
-
page = lru_to_page(list);
+ lruvec = mem_cgroup_page_lruvec(page, zone);

VM_BUG_ON(PageLRU(page));
SetPageLRU(page);

- lruvec = mem_cgroup_lru_add_list(zone, page, lru);
+ nr_pages = hpage_nr_pages(page);
list_move(&page->lru, &lruvec->lists[lru]);
- pgmoved += hpage_nr_pages(page);
+ mem_cgroup_update_lru_size(lruvec, lru, nr_pages);
+ pgmoved += nr_pages;

if (put_page_testzero(page)) {
__ClearPageLRU(page);
__ClearPageActive(page);
- del_page_from_lru_list(zone, page, lru);
+ del_page_from_lru_list(page, lruvec, lru);

if (unlikely(PageCompound(page))) {
spin_unlock_irq(&zone->lru_lock);
@@ -1730,9 +1744,9 @@ static void shrink_active_list(unsigned
*/
reclaim_stat->recent_rotated[file] += nr_rotated;

- move_active_pages_to_lru(zone, &l_active, &l_hold,
+ move_active_pages_to_lru(lruvec, &l_active, &l_hold,
LRU_ACTIVE + file * LRU_FILE);
- move_active_pages_to_lru(zone, &l_inactive, &l_hold,
+ move_active_pages_to_lru(lruvec, &l_inactive, &l_hold,
LRU_BASE + file * LRU_FILE);
__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
spin_unlock_irq(&zone->lru_lock);
@@ -3529,6 +3543,7 @@ void check_move_unevictable_pages(struct
zone = pagezone;
spin_lock_irq(&zone->lru_lock);
}
+ lruvec = mem_cgroup_page_lruvec(page, zone);

if (!PageLRU(page) || !PageUnevictable(page))
continue;
@@ -3538,11 +3553,8 @@ void check_move_unevictable_pages(struct

VM_BUG_ON(PageActive(page));
ClearPageUnevictable(page);
- __dec_zone_state(zone, NR_UNEVICTABLE);
- lruvec = mem_cgroup_lru_move_lists(zone, page,
- LRU_UNEVICTABLE, lru);
- list_move(&page->lru, &lruvec->lists[lru]);
- __inc_zone_state(zone, NR_INACTIVE_ANON + lru);
+ del_page_from_lru_list(page, lruvec, LRU_UNEVICTABLE);
+ add_page_to_lru_list(page, lruvec, lru);
pgrescued++;
}
}

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