From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH 1/2] xfs: force writes to delalloc regions to unwritten
Date: Thu, 16 Jan 2020 15:16:01 -0800 [thread overview]
Message-ID: <20200116231601.GM8247@magnolia> (raw)
In-Reply-To: <20200116164741.GA4593@infradead.org>
On Thu, Jan 16, 2020 at 08:47:41AM -0800, Christoph Hellwig wrote:
> On Wed, Jan 15, 2020 at 10:15:50PM -0800, Darrick J. Wong wrote:
> > From: Darrick J. Wong <darrick.wong@oracle.com>
> >
> > When writing to a delalloc region in the data fork, commit the new
> > allocations (of the da reservation) as unwritten so that the mappings
> > are only marked written once writeback completes successfully. This
> > fixes the problem of stale data exposure if the system goes down during
> > targeted writeback of a specific region of a file, as tested by
> > generic/042.
>
> I think this is the only safe way to deal with buffered I/O into
> holes, so:
Ditto. Thanks for reviewing things!
--D
> Reviewed-by: Christoph Hellwig <hch@lst.de>
next prev parent reply other threads:[~2020-01-16 23:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-16 6:15 [PATCH 0/2] xfs: fix stale disk exposure after crash Darrick J. Wong
2020-01-16 6:15 ` [PATCH 1/2] xfs: force writes to delalloc regions to unwritten Darrick J. Wong
2020-01-16 16:47 ` Christoph Hellwig
2020-01-16 23:16 ` Darrick J. Wong [this message]
2020-01-19 20:49 ` Dave Chinner
2020-02-03 20:14 ` Darrick J. Wong
2020-05-07 10:32 ` Brian Foster
2020-05-14 16:33 ` Darrick J. Wong
2020-05-14 17:44 ` Brian Foster
2020-05-17 7:48 ` Christoph Hellwig
2020-05-19 0:40 ` Darrick J. Wong
2020-05-20 1:03 ` Dave Chinner
2020-01-16 6:15 ` [PATCH 2/2] xfs: relax unwritten writeback overhead under some circumstances Darrick J. Wong
2020-01-16 16:49 ` Christoph Hellwig
2020-01-16 23:15 ` Darrick J. Wong
2020-01-16 16:49 ` [PATCH 0/2] xfs: fix stale disk exposure after crash Christoph Hellwig
2020-01-16 23:00 ` Darrick J. Wong
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