[PATCH 10/11] mm/page_alloc: Update PGFREE outside the zone lock in __free_pages_ok

From: Mel Gorman <mgorman@techsingularity.net>
To: Linux-MM <linux-mm@kvack.org>,
	Linux-RT-Users <linux-rt-users@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Chuck Lever <chuck.lever@oracle.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>, Michal Hocko <mhocko@kernel.org>,
	Vlastimil Babka <vbabka@suse.cz>,
	Mel Gorman <mgorman@techsingularity.net>
Subject: [PATCH 10/11] mm/page_alloc: Update PGFREE outside the zone lock in __free_pages_ok
Date: Wed, 14 Apr 2021 14:39:30 +0100	[thread overview]
Message-ID: <20210414133931.4555-11-mgorman@techsingularity.net> (raw)
In-Reply-To: <20210414133931.4555-1-mgorman@techsingularity.net>

VM events do not need explicit protection by disabling IRQs so
update the counter with IRQs enabled in __free_pages_ok.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
---
 mm/page_alloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a0b210077178..8a94fe77bef7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1569,10 +1569,11 @@ static void __free_pages_ok(struct page *page, unsigned int order,
 	migratetype = get_pfnblock_migratetype(page, pfn);
 
 	spin_lock_irqsave(&zone->lock, flags);
-	__count_vm_events(PGFREE, 1 << order);
 	migratetype = check_migratetype_isolated(zone, page, pfn, migratetype);
 	__free_one_page(page, pfn, zone, order, migratetype, fpi_flags);
 	spin_unlock_irqrestore(&zone->lock, flags);
+
+	__count_vm_events(PGFREE, 1 << order);
 }
 
 void __free_pages_core(struct page *page, unsigned int order)
-- 
2.26.2

