linux-kernel - Re: [PATCH 5/5] mm/swap: simplify the code of find_get_incore

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Message-Id: <20210518141304.c09cd8762e3f3d16a722444c@linux-foundation.org>
Date:   Tue, 18 May 2021 14:13:04 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Miaohe Lin <linmiaohe@...wei.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 5/5] mm/swap: simplify the code of
 find_get_incore_page()

On Tue, 18 May 2021 15:33:54 +0100 Matthew Wilcox <willy@...radead.org> wrote:

> On Tue, May 18, 2021 at 09:53:52PM +0800, Miaohe Lin wrote:
> > pagecache_get_page() can do find_subpage() for us if we do not specify
> > FGP_HEAD. No functional change intended.
> 
> Please, no.  This interferes with the folio work.

In what way?  Can't the folio patches simply revert this or suitably
alter it?