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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id o10sm16273095qtp.38.2020.01.01.20.06.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 01 Jan 2020 20:06:15 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH] mm/page-writeback.c: avoid potential division by zero Date: Wed, 1 Jan 2020 23:06:14 -0500 Message-Id: References: <62482b58-81e1-0295-1e28-e11261404831@linux.alibaba.com> Cc: Andrew Morton , xlpang@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, julia.lawall@lip6.fr In-Reply-To: <62482b58-81e1-0295-1e28-e11261404831@linux.alibaba.com> To: Wen Yang X-Mailer: iPhone Mail (17C54) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000263, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > On Jan 1, 2020, at 10:57 PM, Wen Yang wrote: >=20 > This issue was introduced by commit 693108a8a667 (=E2=80=9Cwriteback: make= bdi->min/max_ratio handling cgroup writeback aware=E2=80=9D). Okay, this needs a Fixes tag then, and Cc the relevant people, i.e., Tejun a= nd Jens at least. >=20 > Finally, we will summarize the above cases and plan to write a general coc= cinelle rule to check for similar problems.