linux-kernel - [PATCH 07/14] lru/swap: using per lruvec lock in page_cache

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Date:   Tue, 20 Aug 2019 17:48:30 +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>,
        Vlastimil Babka <vbabka@...e.cz>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Matthew Wilcox <willy@...radead.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Peng Fan <peng.fan@....com>,
        Nikolay Borisov <nborisov@...e.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: [PATCH 07/14] lru/swap: using per lruvec lock in page_cache_release

Also cares the lruvec->pgdat syncing.

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Cc: Peng Fan <peng.fan@....com>
Cc: Nikolay Borisov <nborisov@...e.com>
Cc: Ira Weiny <ira.weiny@...el.com>
Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc: cgroups@...r.kernel.org
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
---
 mm/swap.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/swap.c b/mm/swap.c
index 63f4782af57a..2a8fe6df08fc 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -63,12 +63,13 @@ static void __page_cache_release(struct page *page)
 		struct lruvec *lruvec;
 		unsigned long flags;
 
-		spin_lock_irqsave(&pgdat->lruvec.lru_lock, flags);
 		lruvec = mem_cgroup_page_lruvec(page, pgdat);
+		spin_lock_irqsave(&lruvec->lru_lock, flags);
+		sync_lruvec_pgdat(lruvec, pgdat);
 		VM_BUG_ON_PAGE(!PageLRU(page), page);
 		__ClearPageLRU(page);
 		del_page_from_lru_list(page, lruvec, page_off_lru(page));
-		spin_unlock_irqrestore(&pgdat->lruvec.lru_lock, flags);
+		spin_unlock_irqrestore(&lruvec->lru_lock, flags);
 	}
 	__ClearPageWaiters(page);
 	mem_cgroup_uncharge(page);
-- 
1.8.3.1