From: Christoph Hellwig <hch@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 2/2] xfs: Introduce XFS_IOC_ZERO_RANGE
Date: Tue, 3 Aug 2010 14:56:52 -0400 [thread overview]
Message-ID: <20100803185652.GD2824@infradead.org> (raw)
In-Reply-To: <1280816526-30100-3-git-send-email-david@fromorbit.com>
On Tue, Aug 03, 2010 at 04:22:06PM +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> XFS_IOC_ZERO_RANGE is the equivalent of an atomic XFS_IOC_UNRESVSP/
> XFS_IOC_RESVSP call pair. It enabled ranges of written data to be
> turned into zeroes without requiring IO or having to free and
> reallocate the extents in the range given as would occur if we had
> to punch and then preallocate them separately. This enables
> applications to zero parts of files very quickly without changing
> the layout of the files in any way.
Looks good,
Reviewed-by: Christoph Hellwig <hch@lst.de>
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next prev parent reply other threads:[~2010-08-03 18:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-03 6:22 [PATCH 0/2] xfs: Fast zeroing of allocated space Dave Chinner
2010-08-03 6:22 ` [PATCH 1/2] xfs: use range primitives for xfs page cache operations Dave Chinner
2010-08-03 18:56 ` Christoph Hellwig
2010-08-03 6:22 ` [PATCH 2/2] xfs: Introduce XFS_IOC_ZERO_RANGE Dave Chinner
2010-08-03 18:56 ` Christoph Hellwig [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-07-27 5:55 [RFC, PATCH 0/2] xfs: Fast zeroing of allocated space Dave Chinner
2010-07-27 5:55 ` [PATCH 2/2] xfs: Introduce XFS_IOC_ZERO_RANGE Dave Chinner
2010-07-27 7:59 ` Christoph Hellwig
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