linux-kernel - [PATCH v3 2/4] mm: Move nr_deactivate accounting to shrink_active

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Date:   Mon, 18 Feb 2019 11:20:55 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     akpm@...ux-foundation.org, daniel.m.jordan@...cle.com,
        mhocko@...e.com, ktkhai@...tuozzo.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 2/4] mm: Move nr_deactivate accounting to
 shrink_active_list()

We know which LRU is not active.

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
Reviewed-by: Daniel Jordan <daniel.m.jordan@...cle.com>
---
 mm/vmscan.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 84542004a277..8d7d55e71511 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2040,12 +2040,6 @@ static unsigned move_active_pages_to_lru(struct lruvec *lruvec,
 		}
 	}
 
-	if (!is_active_lru(lru)) {
-		__count_vm_events(PGDEACTIVATE, nr_moved);
-		count_memcg_events(lruvec_memcg(lruvec), PGDEACTIVATE,
-				   nr_moved);
-	}
-
 	return nr_moved;
 }
 
@@ -2137,6 +2131,10 @@ static void shrink_active_list(unsigned long nr_to_scan,
 
 	nr_activate = move_active_pages_to_lru(lruvec, &l_active, &l_hold, lru);
 	nr_deactivate = move_active_pages_to_lru(lruvec, &l_inactive, &l_hold, lru - LRU_ACTIVE);
+
+	__count_vm_events(PGDEACTIVATE, nr_deactivate);
+	__count_memcg_events(lruvec_memcg(lruvec), PGDEACTIVATE, nr_deactivate);
+
 	__mod_node_page_state(pgdat, NR_ISOLATED_ANON + file, -nr_taken);
 	spin_unlock_irq(&pgdat->lru_lock);