From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 8/8] xfs: only clear preallocated COW blocks in xfs_reflink_clear_inode_flag
Date: Wed, 14 Mar 2018 09:42:21 +0100 [thread overview]
Message-ID: <20180314084221.GC28480@lst.de> (raw)
In-Reply-To: <20180313205604.GJ4865@magnolia>
On Tue, Mar 13, 2018 at 01:56:04PM -0700, Darrick J. Wong wrote:
> On Tue, Mar 13, 2018 at 03:36:01PM +0100, Christoph Hellwig wrote:
> > Currently these are the only ones that should exist at this point anyway,
> > but with O_ATOMIC writes we might have legit extents around in the COW
> > fork even when clearing the reflink flag.
>
> Hmmm... so I assume that the premise of the O_ATOMIC write series is
> still that we use the cow fork to stage writes until fsync, and the
> presence of a cow fork is now separate from the reflink inode flag?
Yes.
>
> Therefore, it's perfectly legit to have a !reflink inode with real
> extents sitting in the cow fork and legit to be clearing the reflink
> iflag with real extents sitting around.
>
> I think this is ok but I'd sure like to see the atomic writes patches
> before I pull this one in.
Ok. Skip if for now then.
prev parent reply other threads:[~2018-03-14 8:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-13 14:35 misc fixes and cleanups Christoph Hellwig
2018-03-13 14:35 ` [PATCH 1/8] xfs: fix the check for COW extents in xfs_swap_extents Christoph Hellwig
2018-03-13 20:42 ` Darrick J. Wong
2018-03-13 14:35 ` [PATCH 2/8] xfs: don't use XFS_BMAPI_ENTRIRE in xfs_get_blocks Christoph Hellwig
2018-03-13 20:44 ` Darrick J. Wong
2018-03-13 14:35 ` [PATCH 3/8] xfs: assert that xfs_reflink_allocate_cow is called with XFS_ILOCK_EXCL Christoph Hellwig
2018-03-13 20:45 ` Darrick J. Wong
2018-03-13 14:35 ` [PATCH 4/8] xfs: remove xfs_zero_range Christoph Hellwig
2018-03-13 20:45 ` Darrick J. Wong
2018-03-13 14:35 ` [PATCH 5/8] xfs: minor cleanup for xfs_get_blocks Christoph Hellwig
2018-03-13 20:45 ` Darrick J. Wong
2018-03-13 14:35 ` [PATCH 6/8] xfs: minor cleanup for xfs_reflink_end_cow Christoph Hellwig
2018-03-13 20:46 ` Darrick J. Wong
2018-03-13 14:36 ` [PATCH 7/8] xfs: mark xfs_reflink_clear_inode_flag static Christoph Hellwig
2018-03-13 20:50 ` Darrick J. Wong
2018-03-14 8:42 ` Christoph Hellwig
2018-03-13 14:36 ` [PATCH 8/8] xfs: only clear preallocated COW blocks in xfs_reflink_clear_inode_flag Christoph Hellwig
2018-03-13 20:56 ` Darrick J. Wong
2018-03-14 8:42 ` Christoph Hellwig [this message]
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