linux-kernel - Re: [PATCH] mm/hugetlb: correct demote page offset logic

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Message-ID: <YyKpCSEnv+KCL5Jb@localhost.localdomain>
Date:   Thu, 15 Sep 2022 06:24:41 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     Doug Berger <opendmb@...il.com>
Cc:     Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <songmuchun@...edance.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] mm/hugetlb: correct demote page offset logic

On Wed, Sep 14, 2022 at 12:09:17PM -0700, Doug Berger wrote:
> With gigantic pages it may not be true that struct page structures
> are contiguous across the entire gigantic page. The nth_page macro
> is used here in place of direct pointer arithmetic to correct for
> this.
> 
> Fixes: 8531fc6f52f5 ("hugetlb: add hugetlb demote page support")
> Signed-off-by: Doug Berger <opendmb@...il.com>
> Cc: <stable@...r.kernel.org>

Reviewed-by: Oscar Salvador <osalvador@...e.de>


-- 
Oscar Salvador
SUSE Labs