From: Christoph Hellwig <hch@lst.de>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Christoph Hellwig <hch@lst.de>,
"ruansy.fnst@fujitsu.com" <ruansy.fnst@fujitsu.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-xfs <linux-xfs@vger.kernel.org>,
linux-nvdimm <linux-nvdimm@lists.01.org>,
Linux MM <linux-mm@kvack.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
device-mapper development <dm-devel@redhat.com>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
david <david@fromorbit.com>, Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
Goldwyn Rodrigues <rgoldwyn@suse.de>,
"qi.fuli@fujitsu.com" <qi.fuli@fujitsu.com>,
"y-goto@fujitsu.com" <y-goto@fujitsu.com>
Subject: Re: [PATCH v3 01/11] pagemap: Introduce ->memory_failure()
Date: Wed, 24 Mar 2021 18:39:35 +0100 [thread overview]
Message-ID: <20210324173935.GB12770@lst.de> (raw)
In-Reply-To: <CAPcyv4hOrYCW=wjkxkCP+JbyD+A_Po0rW-61qQWAOm3zp_eyUQ@mail.gmail.com>
On Wed, Mar 24, 2021 at 09:37:01AM -0700, Dan Williams wrote:
> > Eww. As I said I think the right way is that the file system (or
> > other consumer) can register a set of callbacks for opening the device.
>
> How does that solve the problem of the driver being notified of all
> pfn failure events?
Ok, I probably just showed I need to spend more time looking at
your proposal vs the actual code..
Don't we have a proper way how one of the nvdimm layers own a
spefific memory range and call directly into that instead of through
a notifier?
> Today pmem only finds out about the ones that are
> notified via native x86 machine check error handling via a notifier
> (yes "firmware-first" error handling fails to do the right thing for
> the pmem driver),
Did any kind of firmware-first error handling ever get anything
right? I wish people would have learned that by now.
> or the ones that are eventually reported via address
> range scrub, but only for the nvdimms that implement range scrubbing.
> memory_failure() seems a reasonable catch all point to route pfn
> failure events, in an arch independent way, to interested drivers.
Yeah.
> I'm fine swapping out dax_device blocking_notiier chains for your
> proposal, but that does not address all the proposed reworks in my
> list which are:
>
> - delete "drivers/acpi/nfit/mce.c"
>
> - teach memory_failure() to be able to communicate range failure
>
> - enable memory_failure() to defer to a filesystem that can say
> "critical metadata is impacted, no point in trying to do file-by-file
> isolation, bring the whole fs down".
This all sounds sensible.
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next prev parent reply other threads:[~2021-03-24 17:39 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-08 10:55 [PATCH v3 00/11] fsdax: introduce fs query to support reflink Shiyang Ruan
2021-02-08 10:55 ` [PATCH v3 01/11] pagemap: Introduce ->memory_failure() Shiyang Ruan
2021-02-10 13:20 ` Christoph Hellwig
2021-03-06 20:36 ` Dan Williams
2021-03-08 3:38 ` ruansy.fnst
2021-03-08 5:23 ` Dan Williams
2021-03-08 11:34 ` ruansy.fnst
2021-03-08 18:01 ` Dan Williams
2021-03-12 10:18 ` ruansy.fnst
2021-03-19 2:17 ` ruansy.fnst
2021-03-24 2:19 ` Dan Williams
2021-03-24 7:47 ` Christoph Hellwig
2021-03-24 16:37 ` Dan Williams
2021-03-24 17:39 ` Christoph Hellwig [this message]
2021-03-24 18:00 ` Dan Williams
2021-02-08 10:55 ` [PATCH v3 02/11] blk: Introduce ->corrupted_range() for block device Shiyang Ruan
2021-02-10 13:21 ` Christoph Hellwig
2021-03-04 22:42 ` Darrick J. Wong
2021-03-05 6:10 ` Christoph Hellwig
2021-02-08 10:55 ` [PATCH v3 03/11] fs: Introduce ->corrupted_range() for superblock Shiyang Ruan
2021-02-08 10:55 ` [PATCH v3 04/11] block_dev: Introduce bd_corrupted_range() for block device Shiyang Ruan
2021-02-08 10:55 ` [PATCH v3 05/11] mm, fsdax: Refactor memory-failure handler for dax mapping Shiyang Ruan
2021-02-10 13:33 ` Christoph Hellwig
2021-02-17 2:56 ` Ruan Shiyang
2021-02-18 8:32 ` Christoph Hellwig
2021-02-18 8:59 ` Ruan Shiyang
2021-03-16 3:21 ` zhong jiang
2021-03-17 3:46 ` ruansy.fnst
2021-02-08 10:55 ` [PATCH v3 06/11] mm, pmem: Implement ->memory_failure() in pmem driver Shiyang Ruan
2021-02-10 13:41 ` Christoph Hellwig
2021-02-08 10:55 ` [PATCH v3 07/11] pmem: Implement ->corrupted_range() for " Shiyang Ruan
2021-02-08 10:55 ` [PATCH v3 08/11] dm: Introduce ->rmap() to find bdev offset Shiyang Ruan
2021-02-08 10:55 ` [PATCH v3 09/11] md: Implement ->corrupted_range() Shiyang Ruan
2021-02-08 10:55 ` [PATCH v3 10/11] xfs: Implement ->corrupted_range() for XFS Shiyang Ruan
2021-02-10 13:44 ` Christoph Hellwig
2021-02-08 10:55 ` [PATCH v3 11/11] fs/dax: Remove useless functions Shiyang Ruan
2021-02-10 13:09 ` Christoph Hellwig
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