From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Yang Subject: [PATCH 2/3] mm/memcg: __mem_cgroup_remove_exceeded could handle a !on-tree mz properly Date: Tue, 8 Mar 2022 01:20:46 +0000 Message-ID: <20220308012047.26638-2-richard.weiyang@gmail.com> References: <20220308012047.26638-1-richard.weiyang@gmail.com> Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=TJpD8WbIgS+xru6bpF+N+uC+vSCiqZY6PRQI5LvMXoI=; b=Mr7bFXwRFUanMnGNnpUckpJUfAZz88L9eyoAngmHhhUmy7Hqswp/VuwagZ443cQndP oCYNfJQDtVorLVlM6sGSf1Aw7fwzcJjKa3hocgArdnUC2b8mUekANMGbZ7JYBxM1ER2N Bwv1pVU1nOKa3h9I+wd+bRWNJvymSim3EsfV01aqg571rb8b1vSnMwMVgQzwupbz4ds6 FlngrH9dFe5VxrBvaH5tLHpypB4tePgIJHkW6e3MDcukco9XUnen3VuH8mD2iDs+fa92 Uqac1l6dB+FODzmk4AEz546j7iblgAs5xOPKwCRZt77Z6pZQTSBQDhKNLnCAm66OnC50 M9QA== In-Reply-To: <20220308012047.26638-1-richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org, mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, vdavydov.dev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, Wei Yang There is no tree operation if mz is not on-tree. Let's remove the extra check. Signed-off-by: Wei Yang --- mm/memcontrol.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index d70bf5cf04eb..344a7e891bc5 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -545,9 +545,11 @@ static void mem_cgroup_update_tree(struct mem_cgroup *memcg, int nid) unsigned long flags; spin_lock_irqsave(&mctz->lock, flags); - /* if on-tree, remove it */ - if (mz->on_tree) - __mem_cgroup_remove_exceeded(mz, mctz); + /* + * remove it first + * If not on-tree, no tree ops. + */ + __mem_cgroup_remove_exceeded(mz, mctz); /* * Insert again. mz->usage_in_excess will be updated. * If excess is 0, no tree ops. -- 2.33.1