linux-ext4 - Re: [PATCH v4 5/8] ext4: move inode extension/truncate code out from ->iomap

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Message-ID: <20191009102010.GA14749@poseidon.bobrowski.net>
Date:   Wed, 9 Oct 2019 21:20:12 +1100
From:   Matthew Bobrowski <mbobrowski@...browski.org>
To:     Ritesh Harjani <riteshh@...ux.ibm.com>
Cc:     tytso@....edu, jack@...e.cz, adilger.kernel@...ger.ca,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        hch@...radead.org, david@...morbit.com, darrick.wong@...cle.com
Subject: Re: [PATCH v4 5/8] ext4: move inode extension/truncate code out from
 ->iomap_end() callback

On Wed, Oct 09, 2019 at 11:57:04AM +0530, Ritesh Harjani wrote:
> On 10/3/19 5:04 PM, Matthew Bobrowski wrote:
> > In preparation for implementing the iomap direct I/O write path
> > modifications, the inode extension/truncate code needs to be moved out
> > from ext4_iomap_end(). For direct I/O, if the current code remained
> > within ext4_iomap_end() it would behave incorrectly. Updating the
> > inode size prior to converting unwritten extents to written extents
> > will potentially allow a racing direct I/O read operation to find
> > unwritten extents before they've been correctly converted.
> > 
> > The inode extension/truncate code has been moved out into a new helper
> > ext4_handle_inode_extension(). This function has been designed so that
> > it can be used by both DAX and direct I/O paths.
> > 
> > Signed-off-by: Matthew Bobrowski <mbobrowski@...browski.org>
> 
> checkpatch shows some whitespaces error in your comments
> in this patch.
> But apart from that, patch looks good to me.

Yeah, I will fix those.

> You may add:
> 
> Reviewed-by: Ritesh Harjani <riteshh@...ux.ibm.com>

Thanks!

--<M>--