[PATCHv11 03/37] memcg: adjust to support new THP refcounting

From: Kirill A. Shutemov
Date: Fri Sep 18 2015 - 11:02:09 EST

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@xxxxxxxxxxxxxxx>
Tested-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
Tested-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Acked-by: Jerome Marchand <jmarchan@xxxxxxxxxx>
---
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 7dd8d215ca7c..3f64db55d8dd 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -291,10 +291,12 @@ static inline 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);

@@ -513,7 +515,8 @@ 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;
@@ -521,12 +524,13 @@ 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 363607691427..df293db32fc9 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -577,7 +577,7 @@ 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;
}
@@ -585,7 +585,7 @@ 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;
}

@@ -604,7 +604,7 @@ 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:
@@ -612,7 +612,7 @@ 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 63b71853a0a6..b605e208621e 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -782,7 +782,7 @@ 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;
@@ -790,7 +790,7 @@ 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;
}
@@ -806,7 +806,7 @@ 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 {
@@ -817,7 +817,7 @@ 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, address, flags,
@@ -829,7 +829,7 @@ 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);
@@ -1126,13 +1126,14 @@ 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);
@@ -1171,7 +1172,7 @@ 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));
@@ -1199,7 +1200,7 @@ 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);
@@ -1265,7 +1266,8 @@ 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);
@@ -1294,7 +1296,7 @@ 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 {
@@ -1303,7 +1305,7 @@ 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);
@@ -2690,8 +2692,7 @@ static void collapse_huge_page(struct mm_struct *mm,
goto out_nolock;
}

- if (unlikely(mem_cgroup_try_charge(new_page, mm,
- gfp, &memcg))) {
+ if (unlikely(mem_cgroup_try_charge(new_page, mm, gfp, &memcg, true))) {
result = SCAN_CGROUP_CHARGE_FAIL;
goto out_nolock;
}
@@ -2793,7 +2794,7 @@ 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);
@@ -2813,7 +2814,7 @@ out_nolock:
trace_mm_collapse_huge_page(mm, isolated, result);
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 5d9a6e8e96c1..03f03262d2b6 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -687,7 +687,7 @@ 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
@@ -700,9 +700,11 @@ 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)
@@ -4558,31 +4560,25 @@ 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;
bool anon;

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;

@@ -4637,9 +4633,9 @@ 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:
@@ -4919,7 +4915,7 @@ 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;
@@ -4948,7 +4944,8 @@ 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++;
@@ -5285,10 +5282,11 @@ 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())
@@ -5318,11 +5316,6 @@ int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
}
}

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

@@ -5351,9 +5344,9 @@ 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);
@@ -5370,13 +5363,8 @@ 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();

@@ -5398,9 +5386,10 @@ 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;
@@ -5412,11 +5401,6 @@ 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);
}

@@ -5674,7 +5658,7 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
* only synchronisation we have for udpating the per-CPU variables.
*/
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 753021d20300..2b80837368d5 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)
@@ -2526,7 +2526,7 @@ 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;
}
@@ -2568,10 +2568,10 @@ 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);
}

@@ -2606,7 +2606,7 @@ 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);
@@ -2700,7 +2700,7 @@ 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;

/*
@@ -2721,7 +2721,7 @@ 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);
@@ -2729,7 +2729,7 @@ 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);
@@ -2740,7 +2740,7 @@ 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:
@@ -2991,7 +2991,7 @@ 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;
}
@@ -3020,7 +3020,7 @@ 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) {
@@ -3035,7 +3035,7 @@ 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 1425863f5322..e1059a1074ae 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -721,7 +721,8 @@ 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 */
@@ -744,9 +745,9 @@ 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);
@@ -1129,7 +1130,8 @@ 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));
@@ -1146,14 +1148,14 @@ 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--;
@@ -1192,7 +1194,8 @@ 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);
@@ -1202,10 +1205,10 @@ 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 c4b7069c8ad0..f131bc1838d3 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1145,14 +1145,15 @@ 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;
}
@@ -1164,10 +1165,10 @@ 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;
--
2.5.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/