linux-kernel - [PATCH 13/14] lru/vmscan: using per lruvec lru_lock in get_scan

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Date:   Tue, 20 Aug 2019 17:48:36 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Tejun Heo <tj@...nel.org>
Cc:     Alex Shi <alex.shi@...ux.alibaba.com>,
        Michal Hocko <mhocko@...e.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        Yafang Shao <laoar.shao@...il.com>,
        Yang Shi <yang.shi@...ux.alibaba.com>
Subject: [PATCH 13/14] lru/vmscan: using per lruvec lru_lock in get_scan_count

The lruvec is passed as parameter, so no lruvec->pgdat syncing needed.

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Kirill Tkhai <ktkhai@...tuozzo.com>
Cc: Johannes Weiner <hannes@...xchg.org>
Cc: Daniel Jordan <daniel.m.jordan@...cle.com>
Cc: Yafang Shao <laoar.shao@...il.com>
Cc: Yang Shi <yang.shi@...ux.alibaba.com>
Cc: Mel Gorman <mgorman@...hsingularity.net>
Cc: cgroups@...r.kernel.org
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
---
 mm/vmscan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 123447b9beda..ea5c2f3f2567 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2372,7 +2372,7 @@ static void get_scan_count(struct lruvec *lruvec, struct mem_cgroup *memcg,
 	file  = lruvec_lru_size(lruvec, LRU_ACTIVE_FILE, MAX_NR_ZONES) +
 		lruvec_lru_size(lruvec, LRU_INACTIVE_FILE, MAX_NR_ZONES);
 
-	spin_lock_irq(&pgdat->lruvec.lru_lock);
+	spin_lock_irq(&lruvec->lru_lock);
 	if (unlikely(reclaim_stat->recent_scanned[0] > anon / 4)) {
 		reclaim_stat->recent_scanned[0] /= 2;
 		reclaim_stat->recent_rotated[0] /= 2;
@@ -2393,7 +2393,7 @@ static void get_scan_count(struct lruvec *lruvec, struct mem_cgroup *memcg,
 
 	fp = file_prio * (reclaim_stat->recent_scanned[1] + 1);
 	fp /= reclaim_stat->recent_rotated[1] + 1;
-	spin_unlock_irq(&pgdat->lruvec.lru_lock);
+	spin_unlock_irq(&lruvec->lru_lock);
 
 	fraction[0] = ap;
 	fraction[1] = fp;
-- 
1.8.3.1