linux-kernel - Re: [PATCH 0/2] mm: remove page

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Message-ID: <ZJ9LjgghNB3osXIO@casper.infradead.org>
Date:   Fri, 30 Jun 2023 22:39:26 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Peng Zhang <zhangpeng362@...wei.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        sidhartha.kumar@...cle.com, akpm@...ux-foundation.org,
        wangkefeng.wang@...wei.com, sunnanyong@...wei.com
Subject: Re: [PATCH 0/2] mm: remove page_rmapping()

On Fri, Jun 30, 2023 at 08:13:08PM +0800, Peng Zhang wrote:
> From: ZhangPeng <zhangpeng362@...wei.com>
> 
> This minor patch series remove page_rmapping() and convert the last user
> fault_dirty_shared_page() to use a folio.

This patch series works better if you do it in the other order.
First convert the user, then remove the now-unused page_rmapping().

It's almost always a mistake to start with "I want to remove all the
users of API x".  You should be thinking "Here is function y that still
uses pages; I shall convert it to use folios".