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Subject: Re: [PATCH 1/4] memcg: Convert mem_cgroup_move_charge_pte_range() to
 use a folio
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From: Muchun Song <muchun.song@linux.dev>
In-Reply-To: <20240111181219.3462852-2-willy@infradead.org>
Date: Mon, 15 Jan 2024 16:03:22 +0800
Cc: Andrew Morton <akpm@linux-foundation.org>,
 Johannes Weiner <hannes@cmpxchg.org>,
 Michal Hocko <mhocko@kernel.org>,
 Roman Gushchin <roman.gushchin@linux.dev>,
 Shakeel Butt <shakeelb@google.com>,
 cgroups@vger.kernel.org,
 Linux-MM <linux-mm@kvack.org>
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References: <20240111181219.3462852-1-willy@infradead.org>
 <20240111181219.3462852-2-willy@infradead.org>
To: "Matthew Wilcox (Oracle)" <willy@infradead.org>
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> On Jan 12, 2024, at 02:12, Matthew Wilcox (Oracle) =
<willy@infradead.org> wrote:
>=20
> Remove many calls to compound_head() by calling page_folio() once at
> the start of each stanza which receives a struct page from 'target'.
> There should be no change in behaviour here as all the called =
functions
> start out by converting the page to its folio.
>=20
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Reviewed-by: Muchun Song <muchun.song@linux.dev>

Thanks.