linux-kernel - Re: [PATCH] mm/vmscan: remove prefetch_prev_lru

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Message-ID: <959b6558-a745-7e85-f1c4-5eee39df375e@cloud.ionos.com>
Date:   Thu, 16 Jan 2020 14:18:57 +0100
From:   Guoqing Jiang <guoqing.jiang@...ud.ionos.com>
To:     Alex Shi <alex.shi@...ux.alibaba.com>, Qian Cai <cai@....pw>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/vmscan: remove prefetch_prev_lru_page



On 1/15/20 3:31 AM, Alex Shi wrote:
> 在 2020/1/14 下午9:46, Qian Cai 写道:
>>> On Jan 14, 2020, at 7:55 AM, Alex Shi <alex.shi@...ux.alibaba.com> wrote:
>>>
>>> This macro are never used in git history. So better to remove.
>> When removing unused thingy, it is important to figure out which commit introduced it in the first place and Cc the relevant people in that commit.
>>
> Thanks fore reminder, Qian!
>
> This macro was introduced in 1da177e4c3f4 Linux-2.6.12-rc2, no author or commiter could be found.

FYI, seems it was introduced in commit 3aa1dc7725 [PATCH] multithread 
page reclaim in history tree.

Thanks,
Guoqing