From: Christoph Hellwig <hch@infradead.org>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Dave Chinner <david@fromorbit.com>,
Jerome Glisse <jglisse@redhat.com>,
lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [LSF/MM TOPIC] Direct block mapping through fs for device
Date: Fri, 26 Apr 2019 07:47:02 -0700 [thread overview]
Message-ID: <20190426144702.GA31264@infradead.org> (raw)
In-Reply-To: <20190426144507.GB178347@magnolia>
On Fri, Apr 26, 2019 at 07:45:07AM -0700, Darrick J. Wong wrote:
> Hmmm, this lease interface still doesn't support COW, right?
>
> (Right, xfs_pnfs.c bails out with -ENXIO for reflink files)
Yes, but that is because no one bothered to do the work.
pNFS/block and pNFS/scsi explicitly support a compatbile COW
scheme, it is just that no implemented it yet (at all I think,
not just for Linux..).
next prev parent reply other threads:[~2019-04-26 14:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-26 1:38 [LSF/MM TOPIC] Direct block mapping through fs for device Jerome Glisse
2019-04-26 6:28 ` Dave Chinner
2019-04-26 12:45 ` Christoph Hellwig
2019-04-26 14:45 ` Darrick J. Wong
2019-04-26 14:47 ` Christoph Hellwig [this message]
2019-04-26 15:20 ` Jerome Glisse
2019-04-27 1:25 ` Dave Chinner
2019-04-29 13:26 ` Jerome Glisse
2019-05-01 23:47 ` Dave Chinner
2019-05-02 1:52 ` Matthew Wilcox
2019-04-26 20:28 ` Adam Manzanares
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