linux-kernel - [PATCH v3 0/2] hwpoison: fix race with compound page allocation

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Message-Id: <20210511151016.2310627-1-nao.horiguchi@gmail.com>
Date:   Wed, 12 May 2021 00:10:14 +0900
From:   Naoya Horiguchi <nao.horiguchi@...il.com>
To:     Oscar Salvador <osalvador@...e.de>,
        Muchun Song <songmuchun@...edance.com>, linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Michal Hocko <mhocko@...e.com>,
        Tony Luck <tony.luck@...el.com>,
        Naoya Horiguchi <naoya.horiguchi@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/2] hwpoison: fix race with compound page allocation

Hi everyone,

I updated the patch for the issue reported by Muchun Song in [1].  I
separated into two patches (to reduce the size of core fix for stable):
patch 1/2 focuses on preventing VM_BUG_ON_PAGE() in the reported race.
Patch 2/2 includes some code improvement like calling retry code, revising
the function comment, and some refactoring.

Any comment and testing would be appreciated.

Thanks,
Naoya Horiguchi

[1] https://lore.kernel.org/linux-mm/20210421060259.67554-1-songmuchun@bytedance.com/T/
---
Summary:

Naoya Horiguchi (2):
      mm,hwpoison: fix race with compound page allocation
      mm,hwpoison: make get_hwpoison_page call get_any_page()

 mm/memory-failure.c | 169 +++++++++++++++++++++++++++++-----------------------
 1 file changed, 96 insertions(+), 73 deletions(-)