Commit 62cccb8c authored by Johannes Weiner's avatar Johannes Weiner Committed by Linus Torvalds

mm: simplify lock_page_memcg()

Now that migration doesn't clear page->mem_cgroup of live pages anymore,
it's safe to make lock_page_memcg() and the memcg stat functions take
pages, and spare the callers from memcg objects.

[akpm@linux-foundation.org: fix warnings]
Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Suggested-by: default avatarVladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: default avatarVladimir Davydov <vdavydov@virtuozzo.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6a93ca8f
......@@ -624,14 +624,14 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
* The caller must hold lock_page_memcg().
*/
static void __set_page_dirty(struct page *page, struct address_space *mapping,
struct mem_cgroup *memcg, int warn)
int warn)
{
unsigned long flags;
spin_lock_irqsave(&mapping->tree_lock, flags);
if (page->mapping) { /* Race with truncate? */
WARN_ON_ONCE(warn && !PageUptodate(page));
account_page_dirtied(page, mapping, memcg);
account_page_dirtied(page, mapping);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
......@@ -666,7 +666,6 @@ static void __set_page_dirty(struct page *page, struct address_space *mapping,
int __set_page_dirty_buffers(struct page *page)
{
int newly_dirty;
struct mem_cgroup *memcg;
struct address_space *mapping = page_mapping(page);
if (unlikely(!mapping))
......@@ -686,14 +685,14 @@ int __set_page_dirty_buffers(struct page *page)
* Lock out page->mem_cgroup migration to keep PageDirty
* synchronized with per-memcg dirty page counters.
*/
memcg = lock_page_memcg(page);
lock_page_memcg(page);
newly_dirty = !TestSetPageDirty(page);
spin_unlock(&mapping->private_lock);
if (newly_dirty)
__set_page_dirty(page, mapping, memcg, 1);
__set_page_dirty(page, mapping, 1);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
if (newly_dirty)
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
......@@ -1167,15 +1166,14 @@ void mark_buffer_dirty(struct buffer_head *bh)
if (!test_set_buffer_dirty(bh)) {
struct page *page = bh->b_page;
struct address_space *mapping = NULL;
struct mem_cgroup *memcg;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
if (!TestSetPageDirty(page)) {
mapping = page_mapping(page);
if (mapping)
__set_page_dirty(page, mapping, memcg, 0);
__set_page_dirty(page, mapping, 0);
}
unlock_page_memcg(memcg);
unlock_page_memcg(page);
if (mapping)
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
}
......
......@@ -1957,7 +1957,6 @@ xfs_vm_set_page_dirty(
loff_t end_offset;
loff_t offset;
int newly_dirty;
struct mem_cgroup *memcg;
if (unlikely(!mapping))
return !TestSetPageDirty(page);
......@@ -1981,7 +1980,7 @@ xfs_vm_set_page_dirty(
* Lock out page->mem_cgroup migration to keep PageDirty
* synchronized with per-memcg dirty page counters.
*/
memcg = lock_page_memcg(page);
lock_page_memcg(page);
newly_dirty = !TestSetPageDirty(page);
spin_unlock(&mapping->private_lock);
......@@ -1992,13 +1991,13 @@ xfs_vm_set_page_dirty(
spin_lock_irqsave(&mapping->tree_lock, flags);
if (page->mapping) { /* Race with truncate? */
WARN_ON_ONCE(!PageUptodate(page));
account_page_dirtied(page, mapping, memcg);
account_page_dirtied(page, mapping);
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}
spin_unlock_irqrestore(&mapping->tree_lock, flags);
}
unlock_page_memcg(memcg);
unlock_page_memcg(page);
if (newly_dirty)
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
return newly_dirty;
......
......@@ -455,42 +455,42 @@ bool mem_cgroup_oom_synchronize(bool wait);
extern int do_swap_account;
#endif
struct mem_cgroup *lock_page_memcg(struct page *page);
void unlock_page_memcg(struct mem_cgroup *memcg);
void lock_page_memcg(struct page *page);
void unlock_page_memcg(struct page *page);
/**
* mem_cgroup_update_page_stat - update page state statistics
* @memcg: memcg to account against
* @page: the page
* @idx: page state item to account
* @val: number of pages (positive or negative)
*
* Callers must use lock_page_memcg() to prevent double accounting
* when the page is concurrently being moved to another memcg:
*
* memcg = lock_page_memcg(page);
* lock_page_memcg(page);
* if (TestClearPageState(page))
* mem_cgroup_update_page_stat(memcg, state, -1);
* unlock_page_memcg(memcg);
* mem_cgroup_update_page_stat(page, state, -1);
* unlock_page_memcg(page);
*/
static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg,
static inline void mem_cgroup_update_page_stat(struct page *page,
enum mem_cgroup_stat_index idx, int val)
{
VM_BUG_ON(!rcu_read_lock_held());
if (memcg)
this_cpu_add(memcg->stat->count[idx], val);
if (page->mem_cgroup)
this_cpu_add(page->mem_cgroup->stat->count[idx], val);
}
static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
static inline void mem_cgroup_inc_page_stat(struct page *page,
enum mem_cgroup_stat_index idx)
{
mem_cgroup_update_page_stat(memcg, idx, 1);
mem_cgroup_update_page_stat(page, idx, 1);
}
static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
static inline void mem_cgroup_dec_page_stat(struct page *page,
enum mem_cgroup_stat_index idx)
{
mem_cgroup_update_page_stat(memcg, idx, -1);
mem_cgroup_update_page_stat(page, idx, -1);
}
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
......@@ -661,12 +661,11 @@ mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
}
static inline struct mem_cgroup *lock_page_memcg(struct page *page)
static inline void lock_page_memcg(struct page *page)
{
return NULL;
}
static inline void unlock_page_memcg(struct mem_cgroup *memcg)
static inline void unlock_page_memcg(struct page *page)
{
}
......@@ -692,12 +691,12 @@ static inline bool mem_cgroup_oom_synchronize(bool wait)
return false;
}
static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
static inline void mem_cgroup_inc_page_stat(struct page *page,
enum mem_cgroup_stat_index idx)
{
}
static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
static inline void mem_cgroup_dec_page_stat(struct page *page,
enum mem_cgroup_stat_index idx)
{
}
......
......@@ -1291,10 +1291,9 @@ int __set_page_dirty_nobuffers(struct page *page);
int __set_page_dirty_no_writeback(struct page *page);
int redirty_page_for_writepage(struct writeback_control *wbc,
struct page *page);
void account_page_dirtied(struct page *page, struct address_space *mapping,
struct mem_cgroup *memcg);
void account_page_dirtied(struct page *page, struct address_space *mapping);
void account_page_cleaned(struct page *page, struct address_space *mapping,
struct mem_cgroup *memcg, struct bdi_writeback *wb);
struct bdi_writeback *wb);
int set_page_dirty(struct page *page);
int set_page_dirty_lock(struct page *page);
void cancel_dirty_page(struct page *page);
......
......@@ -663,8 +663,7 @@ int add_to_page_cache_locked(struct page *page, struct address_space *mapping,
int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
pgoff_t index, gfp_t gfp_mask);
extern void delete_from_page_cache(struct page *page);
extern void __delete_from_page_cache(struct page *page, void *shadow,
struct mem_cgroup *memcg);
extern void __delete_from_page_cache(struct page *page, void *shadow);
int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask);
/*
......
......@@ -179,8 +179,7 @@ static void page_cache_tree_delete(struct address_space *mapping,
* is safe. The caller must hold the mapping's tree_lock and
* lock_page_memcg().
*/
void __delete_from_page_cache(struct page *page, void *shadow,
struct mem_cgroup *memcg)
void __delete_from_page_cache(struct page *page, void *shadow)
{
struct address_space *mapping = page->mapping;
......@@ -239,8 +238,7 @@ void __delete_from_page_cache(struct page *page, void *shadow,
* anyway will be cleared before returning page into buddy allocator.
*/
if (WARN_ON_ONCE(PageDirty(page)))
account_page_cleaned(page, mapping, memcg,
inode_to_wb(mapping->host));
account_page_cleaned(page, mapping, inode_to_wb(mapping->host));
}
/**
......@@ -254,7 +252,6 @@ void __delete_from_page_cache(struct page *page, void *shadow,
void delete_from_page_cache(struct page *page)
{
struct address_space *mapping = page->mapping;
struct mem_cgroup *memcg;
unsigned long flags;
void (*freepage)(struct page *);
......@@ -263,11 +260,11 @@ void delete_from_page_cache(struct page *page)
freepage = mapping->a_ops->freepage;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
spin_lock_irqsave(&mapping->tree_lock, flags);
__delete_from_page_cache(page, NULL, memcg);
__delete_from_page_cache(page, NULL);
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
if (freepage)
freepage(page);
......@@ -551,7 +548,6 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask)
if (!error) {
struct address_space *mapping = old->mapping;
void (*freepage)(struct page *);
struct mem_cgroup *memcg;
unsigned long flags;
pgoff_t offset = old->index;
......@@ -561,9 +557,9 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask)
new->mapping = mapping;
new->index = offset;
memcg = lock_page_memcg(old);
lock_page_memcg(old);
spin_lock_irqsave(&mapping->tree_lock, flags);
__delete_from_page_cache(old, NULL, memcg);
__delete_from_page_cache(old, NULL);
error = radix_tree_insert(&mapping->page_tree, offset, new);
BUG_ON(error);
mapping->nrpages++;
......@@ -576,7 +572,7 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask)
if (PageSwapBacked(new))
__inc_zone_page_state(new, NR_SHMEM);
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(old);
mem_cgroup_migrate(old, new);
radix_tree_preload_end();
if (freepage)
......
......@@ -1690,7 +1690,7 @@ bool mem_cgroup_oom_synchronize(bool handle)
* This function protects unlocked LRU pages from being moved to
* another cgroup and stabilizes their page->mem_cgroup binding.
*/
struct mem_cgroup *lock_page_memcg(struct page *page)
void lock_page_memcg(struct page *page)
{
struct mem_cgroup *memcg;
unsigned long flags;
......@@ -1699,25 +1699,18 @@ struct mem_cgroup *lock_page_memcg(struct page *page)
* The RCU lock is held throughout the transaction. The fast
* path can get away without acquiring the memcg->move_lock
* because page moving starts with an RCU grace period.
*
* The RCU lock also protects the memcg from being freed when
* the page state that is going to change is the only thing
* preventing the page from being uncharged.
* E.g. end-writeback clearing PageWriteback(), which allows
* migration to go ahead and uncharge the page before the
* account transaction might be complete.
*/
rcu_read_lock();
if (mem_cgroup_disabled())
return NULL;
return;
again:
memcg = page->mem_cgroup;
if (unlikely(!memcg))
return NULL;
return;
if (atomic_read(&memcg->moving_account) <= 0)
return memcg;
return;
spin_lock_irqsave(&memcg->move_lock, flags);
if (memcg != page->mem_cgroup) {
......@@ -1733,16 +1726,18 @@ struct mem_cgroup *lock_page_memcg(struct page *page)
memcg->move_lock_task = current;
memcg->move_lock_flags = flags;
return memcg;
return;
}
EXPORT_SYMBOL(lock_page_memcg);
/**
* unlock_page_memcg - unlock a page->mem_cgroup binding
* @memcg: the memcg returned by lock_page_memcg()
* @page: the page
*/
void unlock_page_memcg(struct mem_cgroup *memcg)
void unlock_page_memcg(struct page *page)
{
struct mem_cgroup *memcg = page->mem_cgroup;
if (memcg && memcg->move_lock_task == current) {
unsigned long flags = memcg->move_lock_flags;
......
......@@ -2414,8 +2414,7 @@ int __set_page_dirty_no_writeback(struct page *page)
*
* NOTE: This relies on being atomic wrt interrupts.
*/
void account_page_dirtied(struct page *page, struct address_space *mapping,
struct mem_cgroup *memcg)
void account_page_dirtied(struct page *page, struct address_space *mapping)
{
struct inode *inode = mapping->host;
......@@ -2427,7 +2426,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping,
inode_attach_wb(inode, page);
wb = inode_to_wb(inode);
mem_cgroup_inc_page_stat(memcg, MEM_CGROUP_STAT_DIRTY);
mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_DIRTY);
__inc_zone_page_state(page, NR_FILE_DIRTY);
__inc_zone_page_state(page, NR_DIRTIED);
__inc_wb_stat(wb, WB_RECLAIMABLE);
......@@ -2445,10 +2444,10 @@ EXPORT_SYMBOL(account_page_dirtied);
* Caller must hold lock_page_memcg().
*/
void account_page_cleaned(struct page *page, struct address_space *mapping,
struct mem_cgroup *memcg, struct bdi_writeback *wb)
struct bdi_writeback *wb)
{
if (mapping_cap_account_dirty(mapping)) {
mem_cgroup_dec_page_stat(memcg, MEM_CGROUP_STAT_DIRTY);
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_DIRTY);
dec_zone_page_state(page, NR_FILE_DIRTY);
dec_wb_stat(wb, WB_RECLAIMABLE);
task_io_account_cancelled_write(PAGE_CACHE_SIZE);
......@@ -2469,26 +2468,24 @@ void account_page_cleaned(struct page *page, struct address_space *mapping,
*/
int __set_page_dirty_nobuffers(struct page *page)
{
struct mem_cgroup *memcg;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
if (!TestSetPageDirty(page)) {
struct address_space *mapping = page_mapping(page);
unsigned long flags;
if (!mapping) {
unlock_page_memcg(memcg);
unlock_page_memcg(page);
return 1;
}
spin_lock_irqsave(&mapping->tree_lock, flags);
BUG_ON(page_mapping(page) != mapping);
WARN_ON_ONCE(!PagePrivate(page) && !PageUptodate(page));
account_page_dirtied(page, mapping, memcg);
account_page_dirtied(page, mapping);
radix_tree_tag_set(&mapping->page_tree, page_index(page),
PAGECACHE_TAG_DIRTY);
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
if (mapping->host) {
/* !PageAnon && !swapper_space */
......@@ -2496,7 +2493,7 @@ int __set_page_dirty_nobuffers(struct page *page)
}
return 1;
}
unlock_page_memcg(memcg);
unlock_page_memcg(page);
return 0;
}
EXPORT_SYMBOL(__set_page_dirty_nobuffers);
......@@ -2626,17 +2623,16 @@ void cancel_dirty_page(struct page *page)
if (mapping_cap_account_dirty(mapping)) {
struct inode *inode = mapping->host;
struct bdi_writeback *wb;
struct mem_cgroup *memcg;
bool locked;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
wb = unlocked_inode_to_wb_begin(inode, &locked);
if (TestClearPageDirty(page))
account_page_cleaned(page, mapping, memcg, wb);
account_page_cleaned(page, mapping, wb);
unlocked_inode_to_wb_end(inode, locked);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
} else {
ClearPageDirty(page);
}
......@@ -2667,7 +2663,6 @@ int clear_page_dirty_for_io(struct page *page)
if (mapping && mapping_cap_account_dirty(mapping)) {
struct inode *inode = mapping->host;
struct bdi_writeback *wb;
struct mem_cgroup *memcg;
bool locked;
/*
......@@ -2705,16 +2700,16 @@ int clear_page_dirty_for_io(struct page *page)
* always locked coming in here, so we get the desired
* exclusion.
*/
memcg = lock_page_memcg(page);
lock_page_memcg(page);
wb = unlocked_inode_to_wb_begin(inode, &locked);
if (TestClearPageDirty(page)) {
mem_cgroup_dec_page_stat(memcg, MEM_CGROUP_STAT_DIRTY);
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_DIRTY);
dec_zone_page_state(page, NR_FILE_DIRTY);
dec_wb_stat(wb, WB_RECLAIMABLE);
ret = 1;
}
unlocked_inode_to_wb_end(inode, locked);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
return ret;
}
return TestClearPageDirty(page);
......@@ -2724,10 +2719,9 @@ EXPORT_SYMBOL(clear_page_dirty_for_io);
int test_clear_page_writeback(struct page *page)
{
struct address_space *mapping = page_mapping(page);
struct mem_cgroup *memcg;
int ret;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
if (mapping) {
struct inode *inode = mapping->host;
struct backing_dev_info *bdi = inode_to_bdi(inode);
......@@ -2751,21 +2745,20 @@ int test_clear_page_writeback(struct page *page)
ret = TestClearPageWriteback(page);
}
if (ret) {
mem_cgroup_dec_page_stat(memcg, MEM_CGROUP_STAT_WRITEBACK);
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_WRITEBACK);
dec_zone_page_state(page, NR_WRITEBACK);
inc_zone_page_state(page, NR_WRITTEN);
}
unlock_page_memcg(memcg);
unlock_page_memcg(page);
return ret;
}
int __test_set_page_writeback(struct page *page, bool keep_write)
{
struct address_space *mapping = page_mapping(page);
struct mem_cgroup *memcg;
int ret;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
if (mapping) {
struct inode *inode = mapping->host;
struct backing_dev_info *bdi = inode_to_bdi(inode);
......@@ -2793,10 +2786,10 @@ int __test_set_page_writeback(struct page *page, bool keep_write)
ret = TestSetPageWriteback(page);
}
if (!ret) {
mem_cgroup_inc_page_stat(memcg, MEM_CGROUP_STAT_WRITEBACK);
mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_WRITEBACK);
inc_zone_page_state(page, NR_WRITEBACK);
}
unlock_page_memcg(memcg);
unlock_page_memcg(page);
return ret;
}
......
......@@ -1287,21 +1287,17 @@ void page_add_new_anon_rmap(struct page *page,
*/
void page_add_file_rmap(struct page *page)
{
struct mem_cgroup *memcg;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
if (atomic_inc_and_test(&page->_mapcount)) {
__inc_zone_page_state(page, NR_FILE_MAPPED);
mem_cgroup_inc_page_stat(memcg, MEM_CGROUP_STAT_FILE_MAPPED);
mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
}
unlock_page_memcg(memcg);
unlock_page_memcg(page);
}
static void page_remove_file_rmap(struct page *page)
{
struct mem_cgroup *memcg;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
/* Hugepages are not counted in NR_FILE_MAPPED for now. */
if (unlikely(PageHuge(page))) {
......@@ -1320,12 +1316,12 @@ static void page_remove_file_rmap(struct page *page)
* pte lock(a spinlock) is held, which implies preemption disabled.
*/
__dec_zone_page_state(page, NR_FILE_MAPPED);
mem_cgroup_dec_page_stat(memcg, MEM_CGROUP_STAT_FILE_MAPPED);
mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_FILE_MAPPED);
if (unlikely(PageMlocked(page)))
clear_page_mlock(page);
out:
unlock_page_memcg(memcg);
unlock_page_memcg(page);
}
static void page_remove_anon_compound_rmap(struct page *page)
......
......@@ -519,7 +519,6 @@ EXPORT_SYMBOL(invalidate_mapping_pages);
static int
invalidate_complete_page2(struct address_space *mapping, struct page *page)
{
struct mem_cgroup *memcg;
unsigned long flags;
if (page->mapping != mapping)
......@@ -528,15 +527,15 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
if (page_has_private(page) && !try_to_release_page(page, GFP_KERNEL))
return 0;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
spin_lock_irqsave(&mapping->tree_lock, flags);
if (PageDirty(page))
goto failed;
BUG_ON(page_has_private(page));
__delete_from_page_cache(page, NULL, memcg);
__delete_from_page_cache(page, NULL);
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
if (mapping->a_ops->freepage)
mapping->a_ops->freepage(page);
......@@ -545,7 +544,7 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
return 1;
failed:
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
return 0;
}
......
......@@ -603,12 +603,11 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
bool reclaimed)
{
unsigned long flags;
struct mem_cgroup *memcg;
BUG_ON(!PageLocked(page));
BUG_ON(mapping != page_mapping(page));
memcg = lock_page_memcg(page);
lock_page_memcg(page);
spin_lock_irqsave(&mapping->tree_lock, flags);
/*
* The non racy check for a busy page.
......@@ -648,7 +647,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
mem_cgroup_swapout(page, swap);
__delete_from_swap_cache(page);
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
swapcache_free(swap);
} else {
void (*freepage)(struct page *);
......@@ -674,9 +673,9 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
if (reclaimed && page_is_file_cache(page) &&
!mapping_exiting(mapping) && !dax_mapping(mapping))
shadow = workingset_eviction(mapping, page);
__delete_from_page_cache(page, shadow, memcg);
__delete_from_page_cache(page, shadow);
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
if (freepage != NULL)
freepage(page);
......@@ -686,7 +685,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
cannot_free:
spin_unlock_irqrestore(&mapping->tree_lock, flags);
unlock_page_memcg(memcg);
unlock_page_memcg(page);
return 0;
}
......
......@@ -305,10 +305,9 @@ bool workingset_refault(void *shadow)
*/
void workingset_activation(struct page *page)
{
struct mem_cgroup *memcg;
struct lruvec *lruvec;
memcg = lock_page_memcg(page);
lock_page_memcg(page);
/*
* Filter non-memcg pages here, e.g. unmap can call
* mark_page_accessed() on VDSO pages.
......@@ -316,12 +315,12 @@ void workingset_activation(struct page *page)
* XXX: See workingset_refault() - this should return
* root_mem_cgroup even for !CONFIG_MEMCG.
*/
if (!mem_cgroup_disabled() && !memcg)
if (!mem_cgroup_disabled() && !page_memcg(page))
goto out;
lruvec = mem_cgroup_zone_lruvec(page_zone(page), memcg);
lruvec = mem_cgroup_zone_lruvec(page_zone(page), page_memcg(page));
atomic_long_inc(&lruvec->inactive_age);
out:
unlock_page_memcg(memcg);
unlock_page_memcg(page);
}
/*
......
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