Re: [PATCH 10/11] mm/page-writeback: Support tail pages in wait_for_stable_page

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To: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH 10/11] mm/page-writeback: Support tail pages in wait_for_stable_page
From: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Date: Wed, 9 Sep 2020 17:53:54 +0300
Cc: linux-mm@xxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Huang Ying <ying.huang@xxxxxxxxx>
In-reply-to: <20200908195539.25896-11-willy@infradead.org>
References: <20200908195539.25896-1-willy@infradead.org> <20200908195539.25896-11-willy@infradead.org>

On Tue, Sep 08, 2020 at 08:55:37PM +0100, Matthew Wilcox (Oracle) wrote:
> page->mapping is undefined for tail pages, so operate exclusively on
> the head page.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>

Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

-- 
 Kirill A. Shutemov

References:
- [PATCH 00/11] Remove assumptions of THP size
  - From: Matthew Wilcox (Oracle)
- [PATCH 10/11] mm/page-writeback: Support tail pages in wait_for_stable_page
  - From: Matthew Wilcox (Oracle)

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