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Mon, 25 Jan 2021 16:51:05 -0800 (PST) Subject: Re: [PATCH v2 08/10] md: Implement ->corrupted_range() To: Shiyang Ruan , linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org Cc: linux-fsdevel@vger.kernel.org, linux-raid@vger.kernel.org, darrick.wong@oracle.com, dan.j.williams@intel.com, david@fromorbit.com, hch@lst.de, song@kernel.org, rgoldwyn@suse.de, qi.fuli@fujitsu.com, y-goto@fujitsu.com References: <20210125225526.1048877-1-ruansy.fnst@cn.fujitsu.com> <20210125225526.1048877-9-ruansy.fnst@cn.fujitsu.com> From: Guoqing Jiang Message-ID: <6100b7ca-7968-e1ea-84b8-074dc216a453@cloud.ionos.com> Date: Tue, 26 Jan 2021 01:50:32 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210125225526.1048877-9-ruansy.fnst@cn.fujitsu.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 1/25/21 23:55, Shiyang Ruan wrote: > With the support of ->rmap(), it is possible to obtain the superblock on > a mapped device. > > If a pmem device is used as one target of mapped device, we cannot > obtain its superblock directly. With the help of SYSFS, the mapped > device can be found on the target devices. So, we iterate the > bdev->bd_holder_disks to obtain its mapped device. > > Signed-off-by: Shiyang Ruan > --- > drivers/md/dm.c | 61 +++++++++++++++++++++++++++++++++++++++++++ > drivers/nvdimm/pmem.c | 11 +++----- > fs/block_dev.c | 42 ++++++++++++++++++++++++++++- > include/linux/genhd.h | 2 ++ > 4 files changed, 107 insertions(+), 9 deletions(-) I can't see md raid is involved here, perhaps dm-devel need to be cced instead of raid list. And the subject need to be changed as well. Thanks, Guoqing