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([2001:1438:4010:2540:116c:62f5:3efc:cdfd]) by smtp.gmail.com with ESMTPSA id x15sm791941edl.48.2020.01.16.05.18.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 Jan 2020 05:18:58 -0800 (PST) Subject: Re: [PATCH] mm/vmscan: remove prefetch_prev_lru_page To: Alex Shi , Qian Cai Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <1579006500-127143-1-git-send-email-alex.shi@linux.alibaba.com> <739f4470-8dfe-bb2f-8100-2134f48868b6@linux.alibaba.com> From: Guoqing Jiang Message-ID: <959b6558-a745-7e85-f1c4-5eee39df375e@cloud.ionos.com> Date: Thu, 16 Jan 2020 14:18:57 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <739f4470-8dfe-bb2f-8100-2134f48868b6@linux.alibaba.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.002202, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 1/15/20 3:31 AM, Alex Shi wrote: > =E5=9C=A8 2020/1/14 =E4=B8=8B=E5=8D=889:46, Qian Cai =E5=86=99=E9=81=93= : >>> On Jan 14, 2020, at 7:55 AM, Alex Shi wr= ote: >>> >>> This macro are never used in git history. So better to remove. >> When removing unused thingy, it is important to figure out which commi= t introduced it in the first place and Cc the relevant people in that com= mit. >> > Thanks fore reminder, Qian! > > This macro was introduced in 1da177e4c3f4 Linux-2.6.12-rc2, no author o= r commiter could be found. FYI, seems it was introduced in commit 3aa1dc7725 [PATCH] multithread=20 page reclaim in history tree. Thanks, Guoqing