From: Christoph Hellwig <hch@infradead.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>,
Vivek Goyal <vgoyal@redhat.com>, Jeff Moyer <jmoyer@redhat.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-nvdimm <linux-nvdimm@lists.01.org>,
Christoph Hellwig <hch@infradead.org>,
device-mapper development <dm-devel@redhat.com>
Subject: Re: [PATCH v5 2/8] drivers/pmem: Allow pmem_clear_poison() to accept arbitrary offset and len
Date: Fri, 28 Feb 2020 06:05:08 -0800 [thread overview]
Message-ID: <20200228140508.GA2987@infradead.org> (raw)
In-Reply-To: <CAPcyv4i2vjUGrwaRsjp1-L0wFf0a00e46F-SUbocQBkiQ3M1kg@mail.gmail.com>
On Thu, Feb 27, 2020 at 07:28:41PM -0800, Dan Williams wrote:
> "don't perform generic memory-error-handling, there's an fs that owns
> this daxdev and wants to disposition errors". The fs/dax.c
> infrastructure that sets up ->index and ->mapping would still need to
> be there for ext4 until its ready to take on the same responsibility.
> Last I checked the ext4 reverse mapping implementation was not as
> capable as XFS. This goes back to why the initial design avoided
> relying on not universally available / stable reverse-mapping
> facilities and opted for extending the generic mm/memory-failure.c
> implementation.
The important but is that we stop using ->index and ->mapping when XFS
is used as that enables using DAX+reflinks, which actually is the most
requested DAX feature on XFS (way more than silly runtime flag switches
for example).
next prev parent reply other threads:[~2020-02-28 14:05 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-18 21:48 [PATCH v5 0/8] dax/pmem: Provide a dax operation to zero range of memory Vivek Goyal
2020-02-18 21:48 ` [PATCH v5 1/8] pmem: Add functions for reading/writing page to/from pmem Vivek Goyal
2020-02-18 21:48 ` [PATCH v5 2/8] drivers/pmem: Allow pmem_clear_poison() to accept arbitrary offset and len Vivek Goyal
2020-02-20 16:17 ` Christoph Hellwig
2020-02-20 21:35 ` Jeff Moyer
2020-02-20 21:57 ` Vivek Goyal
2020-02-21 18:32 ` Jeff Moyer
2020-02-21 20:17 ` Vivek Goyal
2020-02-21 21:00 ` Dan Williams
2020-02-21 21:24 ` Vivek Goyal
2020-02-21 21:30 ` Dan Williams
2020-02-21 21:33 ` Jeff Moyer
2020-02-23 23:03 ` Dave Chinner
2020-02-24 0:40 ` Dan Williams
2020-02-24 13:50 ` Jeff Moyer
2020-02-24 20:48 ` Dan Williams
2020-02-24 21:53 ` Jeff Moyer
2020-02-25 0:26 ` Dan Williams
2020-02-25 20:32 ` Jeff Moyer
2020-02-25 21:52 ` Dan Williams
2020-02-25 23:26 ` Jane Chu
2020-02-24 15:38 ` Vivek Goyal
2020-02-27 3:02 ` Dave Chinner
2020-02-27 4:19 ` Dan Williams
2020-02-28 1:30 ` Dave Chinner
2020-02-28 3:28 ` Dan Williams
2020-02-28 14:05 ` Christoph Hellwig [this message]
2020-02-28 16:26 ` Dan Williams
2020-02-24 20:13 ` Vivek Goyal
2020-02-24 20:52 ` Dan Williams
2020-02-24 21:15 ` Vivek Goyal
2020-02-24 21:32 ` Dan Williams
2020-02-25 13:36 ` Vivek Goyal
2020-02-25 16:25 ` Dan Williams
2020-02-25 20:08 ` Vivek Goyal
2020-02-25 22:49 ` Dan Williams
2020-02-26 13:51 ` Vivek Goyal
2020-02-26 16:57 ` Vivek Goyal
2020-02-27 3:11 ` Dave Chinner
2020-02-27 15:25 ` Vivek Goyal
2020-02-28 1:50 ` Dave Chinner
2020-02-18 21:48 ` [PATCH v5 3/8] pmem: Enable pmem_do_write() to deal with arbitrary ranges Vivek Goyal
2020-02-20 16:17 ` Christoph Hellwig
2020-02-18 21:48 ` [PATCH v5 4/8] dax, pmem: Add a dax operation zero_page_range Vivek Goyal
2020-03-31 19:38 ` Dan Williams
2020-04-01 13:15 ` Vivek Goyal
2020-04-01 16:14 ` Vivek Goyal
2020-02-18 21:48 ` [PATCH v5 5/8] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver Vivek Goyal
2020-02-18 21:48 ` [PATCH v5 6/8] dm,dax: Add dax zero_page_range operation Vivek Goyal
2020-02-18 21:48 ` [PATCH v5 7/8] dax,iomap: Start using dax native zero_page_range() Vivek Goyal
2020-02-18 21:48 ` [PATCH v5 8/8] dax,iomap: Add helper dax_iomap_zero() to zero a range Vivek Goyal
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