linux-kernel - Re: [PATCH 02/12] xfs: set IOMAP_F

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Message-ID: <20191015212111.GV16973@dread.disaster.area>
Date:   Wed, 16 Oct 2019 08:21:11 +1100
From:   Dave Chinner <david@...morbit.com>
To:     Christoph Hellwig <hch@....de>
Cc:     "Darrick J . Wong" <darrick.wong@...cle.com>,
        Damien Le Moal <Damien.LeMoal@....com>,
        Andreas Gruenbacher <agruenba@...hat.com>,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/12] xfs: set IOMAP_F_NEW more carefully

On Tue, Oct 15, 2019 at 05:43:35PM +0200, Christoph Hellwig wrote:
> Don't set IOMAP_F_NEW if we COW over and existing allocated range, as
> these aren't strictly new allocations.  This is required to be able to
> use IOMAP_F_NEW to zero newly allocated blocks, which is required for
> the iomap code to fully support file systems that don't do delayed
> allocations or use unwritten extents.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

looks fine.

Reviewed-by: Dave Chinner <dchinner@...hat.com>

-- 
Dave Chinner
david@...morbit.com