Re: [PATCH 3/4] memcg: Use a folio in get_mctgt_type

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To: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH 3/4] memcg: Use a folio in get_mctgt_type
From: Muchun Song <muchun.song@xxxxxxxxx>
Date: Mon, 15 Jan 2024 11:48:26 +0800
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Roman Gushchin <roman.gushchin@xxxxxxxxx>, Shakeel Butt <shakeelb@xxxxxxxxxx>, cgroups@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
In-reply-to: <20240111181219.3462852-4-willy@infradead.org>
References: <20240111181219.3462852-1-willy@infradead.org> <20240111181219.3462852-4-willy@infradead.org>


> On Jan 12, 2024, at 02:12, Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> wrote:
> 
> Replace seven calls to compound_head() with one.  We still use the
> page as page_mapped() is different from folio_mapped().
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>

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

Thanks.

References:
- [PATCH 0/4] Convert memcontrol charge moving to use folios
  - From: Matthew Wilcox (Oracle)
- [PATCH 3/4] memcg: Use a folio in get_mctgt_type
  - From: Matthew Wilcox (Oracle)

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