linux-kernel - Re: [PATCH 2/3] use nth_page() in place of direct struct page manipulation.

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Message-Id: <50EF53C6-0CE2-4256-B8AB-AE9BF290419D@linux.dev>
Date:   Thu, 31 Aug 2023 15:17:15 +0800
From:   Muchun Song <muchun.song@...ux.dev>
To:     Zi Yan <ziy@...dia.com>
Cc:     Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
        linux-mips@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        "Mike Rapoport (IBM)" <rppt@...nel.org>
Subject: Re: [PATCH 2/3] use nth_page() in place of direct struct page
 manipulation.



> On Aug 31, 2023, at 02:27, Zi Yan <zi.yan@...t.com> wrote:
> 
> From: Zi Yan <ziy@...dia.com>
> 
> When dealing with hugetlb pages, struct page is not guaranteed to be
> contiguous on SPARSEMEM without VMEMMAP. Use nth_page() to handle it
> properly.
> 
> Signed-off-by: Zi Yan <ziy@...dia.com <mailto:ziy@...dia.com>>

Reviewed-by: Muchun Song <songmuchun@...edance.com>

It's better to add a Fixes tag to the commit 38c1ddbde6.

Thanks.