Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Tue, 9 Feb 2021 11:46:40 -0800
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc:     linux-mm@kvack.org, Michal Hocko <mhocko@kernel.org>,
        Oscar Salvador <osalvador@suse.de>,
        Tony Luck <tony.luck@intel.com>,
        Matthew Wilcox <willy@infradead.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
        Naoya Horiguchi <naoya.horiguchi@nec.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1] mm, hwpoison: enable error handling on shmem thp
Message-Id: <20210209114640.73a68074f635852c2ce498e6@linux-foundation.org>
In-Reply-To: <20210209062128.453814-1-nao.horiguchi@gmail.com>
References: <20210209062128.453814-1-nao.horiguchi@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Precedence: bulk

On Tue,  9 Feb 2021 15:21:28 +0900 Naoya Horiguchi <nao.horiguchi@gmail.com> wrote:

> Currently hwpoison code checks PageAnon() for thp and refuses to handle
> errors on non-anonymous thps (just for historical reason).  We now
> support non-anonymou thp like shmem one, so this patch suggests to enable
> to handle shmem thps. Fortunately, we already have can_split_huge_page()
> to check if a give thp is splittable, so this patch relies on it.

Thanks.  We're at -rc7 so I think I'll park this one for 5.12-rc1,
unless it is more urgent than I believe it to be?