linux-kernel - [PATCH v1 0/2] mm: soft-offline: fix race against page allocation

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Message-Id: <1531452366-11661-1-git-send-email-n-horiguchi@ah.jp.nec.com>
Date:   Fri, 13 Jul 2018 12:26:04 +0900
From:   Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:     linux-mm@...ck.org
Cc:     Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        xishi.qiuxishi@...baba-inc.com, zy.zhengyi@...baba-inc.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 0/2] mm: soft-offline: fix race against page allocation

Xishi recently reported the issue about race on reusing the target pages
of soft offlining.
Discussion and analysis showed that we need make sure that setting PG_hwpoison
should be done in the right place under zone->lock for soft offline.
1/2 handles free hugepage's case, and 2/2 hanldes free buddy page's case.

Thanks,
Naoya Horiguchi
---
Summary:

Naoya Horiguchi (2):
      mm: fix race on soft-offlining free huge pages
      mm: soft-offline: close the race against page allocation

 include/linux/page-flags.h |  5 +++++
 include/linux/swapops.h    | 10 ----------
 mm/hugetlb.c               | 11 +++++------
 mm/memory-failure.c        | 44 +++++++++++++++++++++++++++++++++++---------
 mm/migrate.c               |  4 +---
 mm/page_alloc.c            | 29 +++++++++++++++++++++++++++++
 6 files changed, 75 insertions(+), 28 deletions(-)