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From: Yang Shi <yang.shi@linux.alibaba.com>
To: akpm@linux-foundation.org
Cc: yang.shi@linux.alibaba.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] mm: vmpressure: use mem_cgroup_is_root API
Date: Tue, 11 Feb 2020 13:24:09 +0800	[thread overview]
Message-ID: <1581398649-125989-2-git-send-email-yang.shi@linux.alibaba.com> (raw)
In-Reply-To: <1581398649-125989-1-git-send-email-yang.shi@linux.alibaba.com>

Use mem_cgroup_is_root() API to check if memcg is root memcg instead of
open coding.

Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
---
 mm/vmpressure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 0590f00..d69019f 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -280,7 +280,7 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
 		enum vmpressure_levels level;
 
 		/* For now, no users for root-level efficiency */
-		if (!memcg || memcg == root_mem_cgroup)
+		if (!memcg || mem_cgroup_is_root(memcg))
 			return;
 
 		spin_lock(&vmpr->sr_lock);
-- 
1.8.3.1


  reply	other threads:[~2020-02-11  5:25 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11  5:24 [PATCH 1/2] mm: vmpressure: don't need call kfree if kstrndup fails Yang Shi
2020-02-11  5:24 ` Yang Shi [this message]
2020-02-12  2:08   ` [PATCH 2/2] mm: vmpressure: use mem_cgroup_is_root API David Rientjes
2020-02-12  2:08     ` David Rientjes
2020-02-12  8:23   ` Michal Hocko
2020-02-13  3:18     ` Yang Shi
2020-02-12 11:19   ` David Hildenbrand
2020-02-12  2:07 ` [PATCH 1/2] mm: vmpressure: don't need call kfree if kstrndup fails David Rientjes
2020-02-12  2:07   ` David Rientjes
2020-02-12 11:21 ` David Hildenbrand
2020-02-13  3:14   ` Yang Shi
2020-02-13  4:48     ` Andrew Morton
2020-02-13  4:51       ` Yang Shi

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