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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>
This commit is contained in:
Yang Shi 2019-09-23 15:38:09 -07:00 committed by Linus Torvalds
parent 364c1eebe4
commit 7ae88534cd
3 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
mm/page_alloc.c
View File

@ -670,6 +670,7 @@ out:
void free_compound_page(struct page *page)
{
mem_cgroup_uncharge(page);
__free_pages_ok(page, compound_order(page));
}

2
mm/swap.c
View File

@ -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);
}

6
mm/vmscan.c
View File

@ -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