mm: swap: memcg: fix memcg stats for huge pages

PATCH RESEND In review Shakeel Butt 1 participant 1 message May 27, 2020 Memory management

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Shakeel Butt

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2020-05-27 18:29 UTC #0 lore raw

PATCH RESEND 2/3 mm: swap: memcg: fix memcg stats for huge pages

The commit 2262185c5b28 ("mm: per-cgroup memory reclaim stats") added PGLAZYFREE, PGACTIVATE & PGDEACTIVATE stats for cgroups but missed couple of places and PGLAZYFREE missed huge page handling. Fix that. Also for PGLAZYFREE use the irq-unsafe function to update as the irq is already disabled.

Fixes 2262185c5b28 ("mm: per-cgroup memory reclaim stats")

Signed-off-by Shakeel Butt <[email protected]>

Acked-by Johannes Weiner <[email protected]>

---
 mm/swap.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

mm/swap.c +12 -5

index 3dbef6517cac..4eb179ee0b72 100644
@@ -278,6 +278,7 @@ static void __activate_page(struct page *page, struct lruvec *lruvec,
 	if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
 		int file = page_is_file_lru(page);
 		int lru = page_lru_base_type(page);
+		int nr_pages = hpage_nr_pages(page);
 
 		del_page_from_lru_list(page, lruvec, lru);
 		SetPageActive(page);

@@ -285,7 +286,8 @@ static void __activate_page(struct page *page, struct lruvec *lruvec,
 		add_page_to_lru_list(page, lruvec, lru);
 		trace_mm_lru_activate(page);
 
-		__count_vm_events(PGACTIVATE, hpage_nr_pages(page));
+		__count_vm_events(PGACTIVATE, nr_pages);
+		__count_memcg_events(lruvec_memcg(lruvec), PGACTIVATE, nr_pages);
 		update_page_reclaim_stat(lruvec, file, 1);
 	}
 }

@@ -540,8 +542,10 @@ static void lru_deactivate_file_fn(struct page *page, struct lruvec *lruvec,
 		__count_vm_events(PGROTATED, nr_pages);
 	}
 
-	if (active)
+	if (active) {
 		__count_vm_events(PGDEACTIVATE, nr_pages);
+		__count_memcg_events(lruvec_memcg(lruvec), PGDEACTIVATE, nr_pages);
+	}
 	update_page_reclaim_stat(lruvec, file, 0);
 }

@@ -551,13 +555,15 @@ static void lru_deactivate_fn(struct page *page, struct lruvec *lruvec,
 	if (PageLRU(page) && PageActive(page) && !PageUnevictable(page)) {
 		int file = page_is_file_lru(page);
 		int lru = page_lru_base_type(page);
+		int nr_pages = hpage_nr_pages(page);
 
 		del_page_from_lru_list(page, lruvec, lru + LRU_ACTIVE);
 		ClearPageActive(page);
 		ClearPageReferenced(page);
 		add_page_to_lru_list(page, lruvec, lru);
 
-		__count_vm_events(PGDEACTIVATE, hpage_nr_pages(page));
+		__count_vm_events(PGDEACTIVATE, nr_pages);
+		__count_memcg_events(lruvec_memcg(lruvec), PGDEACTIVATE, nr_pages);
 		update_page_reclaim_stat(lruvec, file, 0);
 	}
 }

@@ -568,6 +574,7 @@ static void lru_lazyfree_fn(struct page *page, struct lruvec *lruvec,
 	if (PageLRU(page) && PageAnon(page) && PageSwapBacked(page) &&
 	    !PageSwapCache(page) && !PageUnevictable(page)) {
 		bool active = PageActive(page);
+		int nr_pages = hpage_nr_pages(page);
 
 		del_page_from_lru_list(page, lruvec,
 				       LRU_INACTIVE_ANON + active);

@@ -581,8 +588,8 @@ static void lru_lazyfree_fn(struct page *page, struct lruvec *lruvec,
 		ClearPageSwapBacked(page);
 		add_page_to_lru_list(page, lruvec, LRU_INACTIVE_FILE);
 
-		__count_vm_events(PGLAZYFREE, hpage_nr_pages(page));
-		count_memcg_page_event(page, PGLAZYFREE);
+		__count_vm_events(PGLAZYFREE, nr_pages);
+		__count_memcg_events(lruvec_memcg(lruvec), PGLAZYFREE, nr_pages);
 		update_page_reclaim_stat(lruvec, 1, 0);
 	}
 }

Signature · 1 line

2.27.0.rc0.183.gde8f92d652-goog