linux-kernel - Re: [PATCH] mm/page-writeback.c: avoid potential division by zero

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Message-Id: <D7A1EC0B-6A3C-4149-A249-2E2C99517183@lca.pw>
Date:   Wed, 1 Jan 2020 23:06:14 -0500
From:   Qian Cai <cai@....pw>
To:     Wen Yang <wenyang@...ux.alibaba.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        xlpang@...ux.alibaba.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, julia.lawall@...6.fr
Subject: Re: [PATCH] mm/page-writeback.c: avoid potential division by zero



> On Jan 1, 2020, at 10:57 PM, Wen Yang <wenyang@...ux.alibaba.com> wrote:
> 
> This issue was introduced by commit 693108a8a667 (“writeback: make bdi->min/max_ratio handling cgroup writeback aware”).

Okay, this needs a Fixes tag then, and Cc the relevant people, i.e., Tejun and Jens at least.

> 
> Finally, we will summarize the above cases and plan to write a general coccinelle rule to check for similar problems.