[PATCHv6 03/36] memcg: adjust to support new THP refcounting

Kirill A. Shutemov
2015-06-03T17:20:14Z

As with rmap, with new refcounting we cannot rely on PageTransHuge() to
check if we need to charge size of huge page form the cgroup. We need to
get information from caller to know whether it was mapped with PMD or
PTE.

We do uncharge when last reference on the page gone. At that point if we
see PageTransHuge() it means we need to unchange whole huge page.

The tricky part is partial unmap -- when we try to unmap part of huge
page. We don't do a special handing of this situation, meaning we don't
uncharge the part of huge page unless last user is gone or
split_huge_page() is triggered. In case of cgroup memory pressure
happens the partial unmapped page will be split through shrinker. This
should be good enough.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
---
include/linux/memcontrol.h | 16 +++++++-----
kernel/events/uprobes.c | 7 +++---
mm/filemap.c | 8 +++---
mm/huge_memory.c | 33 ++++++++++++------------
mm/memcontrol.c | 62 +++++++++++++++++-----------------------------
mm/memory.c | 28 ++++++++++-----------
mm/shmem.c | 21 +++++++++-------
mm/swapfile.c | 9 ++++---
mm/userfaultfd.c | 6 ++---
9 files changed, 92 insertions(+), 98 deletions(-)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 6c8918114804..44e62357d876 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -74,10 +74,12 @@ void mem_cgroup_events(struct mem_cgroup *memcg,
bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg);

int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
- gfp_t gfp_mask, struct mem_cgroup **memcgp);
+ gfp_t gfp_mask, struct mem_cgroup **memcgp,
+ bool compound);
void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
- bool lrucare);
-void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg);
+ bool lrucare, bool compound);
+void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg,
+ bool compound);
void mem_cgroup_uncharge(struct page *page);
void mem_cgroup_uncharge_list(struct list_head *page_list);

@@ -209,7 +211,8 @@ static inline bool mem_cgroup_low(struct mem_cgroup *root,

static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask,
- struct mem_cgroup **memcgp)
+ struct mem_cgroup **memcgp,
+ bool compound)
{
*memcgp = NULL;
return 0;
@@ -217,12 +220,13 @@ static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,

static inline void mem_cgroup_commit_charge(struct page *page,
struct mem_cgroup *memcg,
- bool lrucare)
+ bool lrucare, bool compound)
{
}

static inline void mem_cgroup_cancel_charge(struct page *page,
- struct mem_cgroup *memcg)
+ struct mem_cgroup *memcg,
+ bool compound)
{
}

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 5523daf59953..04e26bdf0717 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -169,7 +169,8 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
const unsigned long mmun_end = addr + PAGE_SIZE;
struct mem_cgroup *memcg;

- err = mem_cgroup_try_charge(kpage, vma->vm_mm, GFP_KERNEL, &memcg);
+ err = mem_cgroup_try_charge(kpage, vma->vm_mm, GFP_KERNEL, &memcg,
+ false);
if (err)
return err;

@@ -184,7 +185,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,

get_page(kpage);
page_add_new_anon_rmap(kpage, vma, addr, false);
- mem_cgroup_commit_charge(kpage, memcg, false);
+ mem_cgroup_commit_charge(kpage, memcg, false, false);
lru_cache_add_active_or_unevictable(kpage, vma);

if (!PageAnon(page)) {
@@ -207,7 +208,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,

err = 0;
unlock:
- mem_cgroup_cancel_charge(kpage, memcg);
+ mem_cgroup_cancel_charge(kpage, memcg, false);
mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
unlock_page(page);
return err;
diff --git a/mm/filemap.c b/mm/filemap.c
index df533a10e8c3..cb41cf3069d2 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -562,7 +562,7 @@ static int __add_to_page_cache_locked(struct page *page,

if (!huge) {
error = mem_cgroup_try_charge(page, current->mm,
- gfp_mask, &memcg);
+ gfp_mask, &memcg, false);
if (error)
return error;
}
@@ -570,7 +570,7 @@ static int __add_to_page_cache_locked(struct page *page,
error = radix_tree_maybe_preload(gfp_mask & ~__GFP_HIGHMEM);
if (error) {
if (!huge)
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
return error;
}

@@ -589,7 +589,7 @@ static int __add_to_page_cache_locked(struct page *page,
__inc_zone_page_state(page, NR_FILE_PAGES);
spin_unlock_irq(&mapping->tree_lock);
if (!huge)
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, false);
trace_mm_filemap_add_to_page_cache(page);
return 0;
err_insert:
@@ -597,7 +597,7 @@ err_insert:
/* Leave page->index set: truncation relies upon it */
spin_unlock_irq(&mapping->tree_lock);
if (!huge)
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
page_cache_release(page);
return error;
}
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 310b0650abe0..1043b9b0659c 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -727,7 +727,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,

VM_BUG_ON_PAGE(!PageCompound(page), page);

- if (mem_cgroup_try_charge(page, mm, gfp, &memcg)) {
+ if (mem_cgroup_try_charge(page, mm, gfp, &memcg, true)) {
put_page(page);
count_vm_event(THP_FAULT_FALLBACK);
return VM_FAULT_FALLBACK;
@@ -735,7 +735,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,

pgtable = pte_alloc_one(mm, haddr);
if (unlikely(!pgtable)) {
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, true);
put_page(page);
return VM_FAULT_OOM;
}
@@ -751,7 +751,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,
ptl = pmd_lock(mm, pmd);
if (unlikely(!pmd_none(*pmd))) {
spin_unlock(ptl);
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, true);
put_page(page);
pte_free(mm, pgtable);
} else {
@@ -762,7 +762,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,
int ret;

spin_unlock(ptl);
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, true);
put_page(page);
pte_free(mm, pgtable);
ret = handle_userfault(vma, haddr, flags,
@@ -774,7 +774,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,
entry = mk_huge_pmd(page, vma->vm_page_prot);
entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
page_add_new_anon_rmap(page, vma, haddr, true);
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, true);
lru_cache_add_active_or_unevictable(page, vma);
pgtable_trans_huge_deposit(mm, pmd, pgtable);
set_pmd_at(mm, haddr, pmd, entry);
@@ -1024,13 +1024,14 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
vma, address, page_to_nid(page));
if (unlikely(!pages[i] ||
mem_cgroup_try_charge(pages[i], mm, GFP_KERNEL,
- &memcg))) {
+ &memcg, false))) {
if (pages[i])
put_page(pages[i]);
while (--i >= 0) {
memcg = (void *)page_private(pages[i]);
set_page_private(pages[i], 0);
- mem_cgroup_cancel_charge(pages[i], memcg);
+ mem_cgroup_cancel_charge(pages[i], memcg,
+ false);
put_page(pages[i]);
}
kfree(pages);
@@ -1069,7 +1070,7 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
memcg = (void *)page_private(pages[i]);
set_page_private(pages[i], 0);
page_add_new_anon_rmap(pages[i], vma, haddr, false);
- mem_cgroup_commit_charge(pages[i], memcg, false);
+ mem_cgroup_commit_charge(pages[i], memcg, false, false);
lru_cache_add_active_or_unevictable(pages[i], vma);
pte = pte_offset_map(&_pmd, haddr);
VM_BUG_ON(!pte_none(*pte));
@@ -1097,7 +1098,7 @@ out_free_pages:
for (i = 0; i < HPAGE_PMD_NR; i++) {
memcg = (void *)page_private(pages[i]);
set_page_private(pages[i], 0);
- mem_cgroup_cancel_charge(pages[i], memcg);
+ mem_cgroup_cancel_charge(pages[i], memcg, false);
put_page(pages[i]);
}
kfree(pages);
@@ -1163,7 +1164,8 @@ alloc:
goto out;
}

- if (unlikely(mem_cgroup_try_charge(new_page, mm, huge_gfp, &memcg))) {
+ if (unlikely(mem_cgroup_try_charge(new_page, mm, huge_gfp,
+ &memcg, true))) {
put_page(new_page);
if (page) {
split_huge_page(page);
@@ -1192,7 +1194,7 @@ alloc:
put_user_huge_page(page);
if (unlikely(!pmd_same(*pmd, orig_pmd))) {
spin_unlock(ptl);
- mem_cgroup_cancel_charge(new_page, memcg);
+ mem_cgroup_cancel_charge(new_page, memcg, true);
put_page(new_page);
goto out_mn;
} else {
@@ -1201,7 +1203,7 @@ alloc:
entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
pmdp_huge_clear_flush_notify(vma, haddr, pmd);
page_add_new_anon_rmap(new_page, vma, haddr, true);
- mem_cgroup_commit_charge(new_page, memcg, false);
+ mem_cgroup_commit_charge(new_page, memcg, false, true);
lru_cache_add_active_or_unevictable(new_page, vma);
set_pmd_at(mm, haddr, pmd, entry);
update_mmu_cache_pmd(vma, address, pmd);
@@ -2519,8 +2521,7 @@ static void collapse_huge_page(struct mm_struct *mm,
if (!new_page)
return;

- if (unlikely(mem_cgroup_try_charge(new_page, mm,
- gfp, &memcg)))
+ if (unlikely(mem_cgroup_try_charge(new_page, mm, gfp, &memcg, true)))
return;

/*
@@ -2607,7 +2608,7 @@ static void collapse_huge_page(struct mm_struct *mm,
spin_lock(pmd_ptl);
BUG_ON(!pmd_none(*pmd));
page_add_new_anon_rmap(new_page, vma, address, true);
- mem_cgroup_commit_charge(new_page, memcg, false);
+ mem_cgroup_commit_charge(new_page, memcg, false, true);
lru_cache_add_active_or_unevictable(new_page, vma);
pgtable_trans_huge_deposit(mm, pmd, pgtable);
set_pmd_at(mm, address, pmd, _pmd);
@@ -2622,7 +2623,7 @@ out_up_write:
return;

out:
- mem_cgroup_cancel_charge(new_page, memcg);
+ mem_cgroup_cancel_charge(new_page, memcg, true);
goto out_up_write;
}

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5fd273d22714..1c7c6bb69d3c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -827,7 +827,7 @@ static unsigned long mem_cgroup_read_events(struct mem_cgroup *memcg,

static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg,
struct page *page,
- int nr_pages)
+ bool compound, int nr_pages)
{
/*
* Here, RSS means 'mapped anon' and anon's SwapCache. Shmem/tmpfs is
@@ -840,9 +840,11 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg,
__this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_CACHE],
nr_pages);

- if (PageTransHuge(page))
+ if (compound) {
+ VM_BUG_ON_PAGE(!PageTransHuge(page), page);
__this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_RSS_HUGE],
nr_pages);
+ }

/* pagein of a big page is an event. So, ignore page size */
if (nr_pages > 0)
@@ -4744,30 +4746,24 @@ static struct page *mc_handle_file_pte(struct vm_area_struct *vma,
* from old cgroup.
*/
static int mem_cgroup_move_account(struct page *page,
- unsigned int nr_pages,
+ bool compound,
struct mem_cgroup *from,
struct mem_cgroup *to)
{
unsigned long flags;
+ unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1;
int ret;

VM_BUG_ON(from == to);
VM_BUG_ON_PAGE(PageLRU(page), page);
- /*
- * The page is isolated from LRU. So, collapse function
- * will not handle this page. But page splitting can happen.
- * Do this check under compound_page_lock(). The caller should
- * hold it.
- */
- ret = -EBUSY;
- if (nr_pages > 1 && !PageTransHuge(page))
- goto out;
+ VM_BUG_ON(compound && !PageTransHuge(page));

/*
* Prevent mem_cgroup_migrate() from looking at page->mem_cgroup
* of its source page while we change it: page migration takes
* both pages off the LRU, but page cache replacement doesn't.
*/
+ ret = -EBUSY;
if (!trylock_page(page))
goto out;

@@ -4804,9 +4800,9 @@ static int mem_cgroup_move_account(struct page *page,
ret = 0;

local_irq_disable();
- mem_cgroup_charge_statistics(to, page, nr_pages);
+ mem_cgroup_charge_statistics(to, page, compound, nr_pages);
memcg_check_events(to, page);
- mem_cgroup_charge_statistics(from, page, -nr_pages);
+ mem_cgroup_charge_statistics(from, page, compound, -nr_pages);
memcg_check_events(from, page);
local_irq_enable();
out_unlock:
@@ -5083,7 +5079,7 @@ static int mem_cgroup_move_charge_pte_range(pmd_t *pmd,
if (target_type == MC_TARGET_PAGE) {
page = target.page;
if (!isolate_lru_page(page)) {
- if (!mem_cgroup_move_account(page, HPAGE_PMD_NR,
+ if (!mem_cgroup_move_account(page, true,
mc.from, mc.to)) {
mc.precharge -= HPAGE_PMD_NR;
mc.moved_charge += HPAGE_PMD_NR;
@@ -5112,7 +5108,8 @@ retry:
page = target.page;
if (isolate_lru_page(page))
goto put;
- if (!mem_cgroup_move_account(page, 1, mc.from, mc.to)) {
+ if (!mem_cgroup_move_account(page, false,
+ mc.from, mc.to)) {
mc.precharge--;
/* we uncharge from mc.from later. */
mc.moved_charge++;
@@ -5460,10 +5457,11 @@ bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg)
* with mem_cgroup_cancel_charge() in case page instantiation fails.
*/
int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
- gfp_t gfp_mask, struct mem_cgroup **memcgp)
+ gfp_t gfp_mask, struct mem_cgroup **memcgp,
+ bool compound)
{
struct mem_cgroup *memcg = NULL;
- unsigned int nr_pages = 1;
+ unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1;
int ret = 0;

if (mem_cgroup_disabled())
@@ -5481,11 +5479,6 @@ int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
goto out;
}

- if (PageTransHuge(page)) {
- nr_pages <<= compound_order(page);
- VM_BUG_ON_PAGE(!PageTransHuge(page), page);
- }
-
if (do_swap_account && PageSwapCache(page))
memcg = try_get_mem_cgroup_from_page(page);
if (!memcg)
@@ -5521,9 +5514,9 @@ out:
* Use mem_cgroup_cancel_charge() to cancel the transaction instead.
*/
void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
- bool lrucare)
+ bool lrucare, bool compound)
{
- unsigned int nr_pages = 1;
+ unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1;

VM_BUG_ON_PAGE(!page->mapping, page);
VM_BUG_ON_PAGE(PageLRU(page) && !lrucare, page);
@@ -5540,13 +5533,8 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,

commit_charge(page, memcg, lrucare);

- if (PageTransHuge(page)) {
- nr_pages <<= compound_order(page);
- VM_BUG_ON_PAGE(!PageTransHuge(page), page);
- }
-
local_irq_disable();
- mem_cgroup_charge_statistics(memcg, page, nr_pages);
+ mem_cgroup_charge_statistics(memcg, page, compound, nr_pages);
memcg_check_events(memcg, page);
local_irq_enable();

@@ -5568,9 +5556,10 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
*
* Cancel a charge transaction started by mem_cgroup_try_charge().
*/
-void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg)
+void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg,
+ bool compound)
{
- unsigned int nr_pages = 1;
+ unsigned int nr_pages = compound ? hpage_nr_pages(page) : 1;

if (mem_cgroup_disabled())
return;
@@ -5582,11 +5571,6 @@ void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg)
if (!memcg)
return;

- if (PageTransHuge(page)) {
- nr_pages <<= compound_order(page);
- VM_BUG_ON_PAGE(!PageTransHuge(page), page);
- }
-
cancel_charge(memcg, nr_pages);
}

@@ -5840,7 +5824,7 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
/* XXX: caller holds IRQ-safe mapping->tree_lock */
VM_BUG_ON(!irqs_disabled());

- mem_cgroup_charge_statistics(memcg, page, -1);
+ mem_cgroup_charge_statistics(memcg, page, false, -1);
memcg_check_events(memcg, page);
}

diff --git a/mm/memory.c b/mm/memory.c
index 4cd6d9392004..f48dfa6d8859 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2083,7 +2083,7 @@ static int wp_page_copy(struct mm_struct *mm, struct vm_area_struct *vma,
cow_user_page(new_page, old_page, address, vma);
}

- if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg))
+ if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg, false))
goto oom_free_new;

__SetPageUptodate(new_page);
@@ -2114,7 +2114,7 @@ static int wp_page_copy(struct mm_struct *mm, struct vm_area_struct *vma,
*/
ptep_clear_flush_notify(vma, address, page_table);
page_add_new_anon_rmap(new_page, vma, address, false);
- mem_cgroup_commit_charge(new_page, memcg, false);
+ mem_cgroup_commit_charge(new_page, memcg, false, false);
lru_cache_add_active_or_unevictable(new_page, vma);
/*
* We call the notify macro here because, when using secondary
@@ -2153,7 +2153,7 @@ static int wp_page_copy(struct mm_struct *mm, struct vm_area_struct *vma,
new_page = old_page;
page_copied = 1;
} else {
- mem_cgroup_cancel_charge(new_page, memcg);
+ mem_cgroup_cancel_charge(new_page, memcg, false);
}

if (new_page)
@@ -2528,7 +2528,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
goto out_page;
}

- if (mem_cgroup_try_charge(page, mm, GFP_KERNEL, &memcg)) {
+ if (mem_cgroup_try_charge(page, mm, GFP_KERNEL, &memcg, false)) {
ret = VM_FAULT_OOM;
goto out_page;
}
@@ -2570,10 +2570,10 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
set_pte_at(mm, address, page_table, pte);
if (page == swapcache) {
do_page_add_anon_rmap(page, vma, address, exclusive);
- mem_cgroup_commit_charge(page, memcg, true);
+ mem_cgroup_commit_charge(page, memcg, true, false);
} else { /* ksm created a completely new copy */
page_add_new_anon_rmap(page, vma, address, false);
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, false);
lru_cache_add_active_or_unevictable(page, vma);
}

@@ -2608,7 +2608,7 @@ unlock:
out:
return ret;
out_nomap:
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
pte_unmap_unlock(page_table, ptl);
out_page:
unlock_page(page);
@@ -2698,7 +2698,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
if (!page)
goto oom;

- if (mem_cgroup_try_charge(page, mm, GFP_KERNEL, &memcg))
+ if (mem_cgroup_try_charge(page, mm, GFP_KERNEL, &memcg, false))
goto oom_free_page;

/*
@@ -2719,7 +2719,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
/* Deliver the page fault to userland, check inside PT lock */
if (userfaultfd_missing(vma)) {
pte_unmap_unlock(page_table, ptl);
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
page_cache_release(page);
return handle_userfault(vma, address, flags,
VM_UFFD_MISSING);
@@ -2727,7 +2727,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,

inc_mm_counter_fast(mm, MM_ANONPAGES);
page_add_new_anon_rmap(page, vma, address, false);
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, false);
lru_cache_add_active_or_unevictable(page, vma);
setpte:
set_pte_at(mm, address, page_table, entry);
@@ -2738,7 +2738,7 @@ unlock:
pte_unmap_unlock(page_table, ptl);
return 0;
release:
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
page_cache_release(page);
goto unlock;
oom_free_page:
@@ -2989,7 +2989,7 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
if (!new_page)
return VM_FAULT_OOM;

- if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg)) {
+ if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg, false)) {
page_cache_release(new_page);
return VM_FAULT_OOM;
}
@@ -3018,7 +3018,7 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
goto uncharge_out;
}
do_set_pte(vma, address, new_page, pte, true, true);
- mem_cgroup_commit_charge(new_page, memcg, false);
+ mem_cgroup_commit_charge(new_page, memcg, false, false);
lru_cache_add_active_or_unevictable(new_page, vma);
pte_unmap_unlock(pte, ptl);
if (fault_page) {
@@ -3033,7 +3033,7 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
}
return ret;
uncharge_out:
- mem_cgroup_cancel_charge(new_page, memcg);
+ mem_cgroup_cancel_charge(new_page, memcg, false);
page_cache_release(new_page);
return ret;
}
diff --git a/mm/shmem.c b/mm/shmem.c
index e001168d340a..41c648485161 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -706,7 +706,8 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
* the shmem_swaplist_mutex which might hold up shmem_writepage().
* Charged back to the user (not to caller) when swap account is used.
*/
- error = mem_cgroup_try_charge(page, current->mm, GFP_KERNEL, &memcg);
+ error = mem_cgroup_try_charge(page, current->mm, GFP_KERNEL, &memcg,
+ false);
if (error)
goto out;
/* No radix_tree_preload: swap entry keeps a place for page in tree */
@@ -729,9 +730,9 @@ int shmem_unuse(swp_entry_t swap, struct page *page)
if (error) {
if (error != -ENOMEM)
error = 0;
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
} else
- mem_cgroup_commit_charge(page, memcg, true);
+ mem_cgroup_commit_charge(page, memcg, true, false);
out:
unlock_page(page);
page_cache_release(page);
@@ -1114,7 +1115,8 @@ repeat:
goto failed;
}

- error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg);
+ error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg,
+ false);
if (!error) {
error = shmem_add_to_page_cache(page, mapping, index,
swp_to_radix_entry(swap));
@@ -1131,14 +1133,14 @@ repeat:
* "repeat": reading a hole and writing should succeed.
*/
if (error) {
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
delete_from_swap_cache(page);
}
}
if (error)
goto failed;

- mem_cgroup_commit_charge(page, memcg, true);
+ mem_cgroup_commit_charge(page, memcg, true, false);

spin_lock(&info->lock);
info->swapped--;
@@ -1177,7 +1179,8 @@ repeat:
if (sgp == SGP_WRITE)
__SetPageReferenced(page);

- error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg);
+ error = mem_cgroup_try_charge(page, current->mm, gfp, &memcg,
+ false);
if (error)
goto decused;
error = radix_tree_maybe_preload(gfp & GFP_RECLAIM_MASK);
@@ -1187,10 +1190,10 @@ repeat:
radix_tree_preload_end();
}
if (error) {
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
goto decused;
}
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, false);
lru_cache_add_anon(page);

spin_lock(&info->lock);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 65825c2687f5..6dd365d1c488 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1103,14 +1103,15 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
if (unlikely(!page))
return -ENOMEM;

- if (mem_cgroup_try_charge(page, vma->vm_mm, GFP_KERNEL, &memcg)) {
+ if (mem_cgroup_try_charge(page, vma->vm_mm, GFP_KERNEL, &memcg, false))
+ {
ret = -ENOMEM;
goto out_nolock;
}

pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
if (unlikely(!maybe_same_pte(*pte, swp_entry_to_pte(entry)))) {
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
ret = 0;
goto out;
}
@@ -1122,10 +1123,10 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
pte_mkold(mk_pte(page, vma->vm_page_prot)));
if (page == swapcache) {
page_add_anon_rmap(page, vma, addr, false);
- mem_cgroup_commit_charge(page, memcg, true);
+ mem_cgroup_commit_charge(page, memcg, true, false);
} else { /* ksm created a completely new copy */
page_add_new_anon_rmap(page, vma, addr, false);
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, false);
lru_cache_add_active_or_unevictable(page, vma);
}
swap_free(entry);
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index ae21a1f309c2..806b0c758c5b 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -63,7 +63,7 @@ static int mcopy_atomic_pte(struct mm_struct *dst_mm,
__SetPageUptodate(page);

ret = -ENOMEM;
- if (mem_cgroup_try_charge(page, dst_mm, GFP_KERNEL, &memcg))
+ if (mem_cgroup_try_charge(page, dst_mm, GFP_KERNEL, &memcg, false))
goto out_release;

_dst_pte = mk_pte(page, dst_vma->vm_page_prot);
@@ -77,7 +77,7 @@ static int mcopy_atomic_pte(struct mm_struct *dst_mm,

inc_mm_counter(dst_mm, MM_ANONPAGES);
page_add_new_anon_rmap(page, dst_vma, dst_addr, false);
- mem_cgroup_commit_charge(page, memcg, false);
+ mem_cgroup_commit_charge(page, memcg, false, false);
lru_cache_add_active_or_unevictable(page, dst_vma);

set_pte_at(dst_mm, dst_addr, dst_pte, _dst_pte);
@@ -91,7 +91,7 @@ out:
return ret;
out_release_uncharge_unlock:
pte_unmap_unlock(dst_pte, ptl);
- mem_cgroup_cancel_charge(page, memcg);
+ mem_cgroup_cancel_charge(page, memcg, false);
out_release:
page_cache_release(page);
goto out;
--
2.1.4