From: Muchun Song <songmuchun@bytedance.com>
To: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Linux Memory Management List <linux-mm@kvack.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Michal Hocko <mhocko@suse.com>,
Oscar Salvador <osalvador@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@redhat.com>,
Naoya Horiguchi <naoya.horiguchi@nec.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [External] [PATCH v1] hugetlb: pass head page to remove_hugetlb_page()
Date: Thu, 27 May 2021 10:43:44 +0800 [thread overview]
Message-ID: <CAMZfGtXgZ1R9BSE5=sgxKwHLUdo1zCmr4QBHhncpUxJVpzfi-Q@mail.gmail.com> (raw)
In-Reply-To: <20210526235257.2769473-1-nao.horiguchi@gmail.com>
On Thu, May 27, 2021 at 7:53 AM Naoya Horiguchi <nao.horiguchi@gmail.com> wrote:
>
> From: Naoya Horiguchi <naoya.horiguchi@nec.com>
>
> When memory_failure() or soft_offline_page() is called on a tail page of
> some hugetlb page, "BUG: unable to handle page fault" error can be
> triggered.
>
> remove_hugetlb_page() dereferences page->lru, so it's assumed that the
> page points to a head page, but one of the caller,
> dissolve_free_huge_page(), provides remove_hugetlb_page() with 'page'
> which could be a tail page. So pass 'head' to it, instead.
>
> Fixes: 6eb4e88a6d27 ("hugetlb: create remove_hugetlb_page() to separate functionality")
> Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Thanks Naoya!
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
next prev parent reply other threads:[~2021-05-27 2:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-26 23:52 Naoya Horiguchi
2021-05-27 0:31 ` Matthew Wilcox
2021-05-27 0:55 ` Mike Kravetz
2021-05-27 2:43 ` Muchun Song [this message]
2021-05-27 6:58 ` Michal Hocko
2021-05-27 7:47 ` Oscar Salvador
2021-05-27 8:22 ` Michal Hocko
2021-05-27 16:28 ` Mike Kravetz
2021-05-27 19:54 ` Michal Hocko
2021-05-27 21:12 ` Mike Kravetz
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