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Date:   Wed, 9 Jun 2021 13:27:51 +0300
From:   "Kirill A. Shutemov" <kirill@shutemov.name>
To:     Hugh Dickins <hughd@google.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Yang Shi <shy828301@gmail.com>,
        Wang Yugui <wangyugui@e16-tech.com>,
        Matthew Wilcox <willy@infradead.org>,
        Naoya Horiguchi <naoya.horiguchi@nec.com>,
        Alistair Popple <apopple@nvidia.com>,
        Ralph Campbell <rcampbell@nvidia.com>, Zi Yan <ziy@nvidia.com>,
        Miaohe Lin <linmiaohe@huawei.com>,
        Minchan Kim <minchan@kernel.org>, Jue Wang <juew@google.com>,
        Peter Xu <peterx@redhat.com>, Jan Kara <jack@suse.cz>,
        Shakeel Butt <shakeelb@google.com>,
        Oscar Salvador <osalvador@suse.de>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 10/10] mm: hwpoison_user_mappings() try_to_unmap()
 with TTU_SYNC
Message-ID: <20210609102751.kl4ywrx3bybyg46w@box.shutemov.name>
References: <af88612-1473-2eaa-903-8d1a448b26@google.com>
 <329c28ed-95df-9a2c-8893-b444d8a6d340@google.com>
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On Tue, Jun 08, 2021 at 09:30:00PM -0700, Hugh Dickins wrote:
> TTU_SYNC prevents an unlikely race, when try_to_unmap() returns shortly
> before the page is accounted as unmapped.  It is unlikely to coincide
> with hwpoisoning, but now that we have the flag, hwpoison_user_mappings()
> would do well to use it.
> 
> Signed-off-by: Hugh Dickins <hughd@google.com>

Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

-- 
 Kirill A. Shutemov