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authorYang Shi <yang.shi@linux.alibaba.com>2019-09-23 15:38:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-24 15:54:11 -0700
commit7ae88534cdd96235cd775c03b32a75009355740b (patch)
tree51adc256778558ed4ec74e65f13c1bc964a37f20 /mm
parent364c1eebe453f06f0c1e837eb155a5725c9cd272 (diff)
mm: move mem_cgroup_uncharge out of __page_cache_release()
A later patch makes THP deferred split shrinker memcg aware, but it needs page->mem_cgroup information in THP destructor, which is called after mem_cgroup_uncharge() now. So move mem_cgroup_uncharge() from __page_cache_release() to compound page destructor, which is called by both THP and other compound pages except HugeTLB. And call it in __put_single_page() for single order page. Link: http://lkml.kernel.org/r/1565144277-36240-3-git-send-email-yang.shi@linux.alibaba.com Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com> Suggested-by: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Hugh Dickins <hughd@google.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: David Rientjes <rientjes@google.com> Cc: Qian Cai <cai@lca.pw> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c1
-rw-r--r--mm/swap.c2
-rw-r--r--mm/vmscan.c6
3 files changed, 4 insertions, 5 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a41436cca563..3334a769eb91 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -670,6 +670,7 @@ out:
void free_compound_page(struct page *page)
{
+ mem_cgroup_uncharge(page);
__free_pages_ok(page, compound_order(page));
}
diff --git a/mm/swap.c b/mm/swap.c
index 0226c5346560..784dc1620620 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -71,12 +71,12 @@ static void __page_cache_release(struct page *page)
spin_unlock_irqrestore(&pgdat->lru_lock, flags);
}
__ClearPageWaiters(page);
- mem_cgroup_uncharge(page);
}
static void __put_single_page(struct page *page)
{
__page_cache_release(page);
+ mem_cgroup_uncharge(page);
free_unref_page(page);
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index c27dd62ed594..c4ef8681637b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1487,10 +1487,9 @@ free_it:
* Is there need to periodically free_page_list? It would
* appear not as the counts should be low
*/
- if (unlikely(PageTransHuge(page))) {
- mem_cgroup_uncharge(page);
+ if (unlikely(PageTransHuge(page)))
(*get_compound_page_dtor(page))(page);
- } else
+ else
list_add(&page->lru, &free_pages);
continue;
@@ -1911,7 +1910,6 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec,
if (unlikely(PageCompound(page))) {
spin_unlock_irq(&pgdat->lru_lock);
- mem_cgroup_uncharge(page);
(*get_compound_page_dtor(page))(page);
spin_lock_irq(&pgdat->lru_lock);
} else