linux-kernel - Re: [PATCH v3 01/11] pagemap: Introduce ->memory

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Message-ID: <20210210132055.GB30109@lst.de>
Date:   Wed, 10 Feb 2021 14:20:55 +0100
From:   Christoph Hellwig <hch@....de>
To:     Shiyang Ruan <ruansy.fnst@...fujitsu.com>
Cc:     linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, dm-devel@...hat.com,
        darrick.wong@...cle.com, dan.j.williams@...el.com,
        david@...morbit.com, hch@....de, agk@...hat.com,
        snitzer@...hat.com, rgoldwyn@...e.de, qi.fuli@...itsu.com,
        y-goto@...itsu.com
Subject: Re: [PATCH v3 01/11] pagemap: Introduce ->memory_failure()

On Mon, Feb 08, 2021 at 06:55:20PM +0800, Shiyang Ruan wrote:
> When memory-failure occurs, we call this function which is implemented
> by each kind of devices.  For the fsdax case, pmem device driver
> implements it.  Pmem device driver will find out the block device where
> the error page locates in, and try to get the filesystem on this block
> device.  And finally call filesystem handler to deal with the error.
> The filesystem will try to recover the corrupted data if possiable.

I'm not sure adding just a method without any of the support code
is a useful patch on its own.