From: Matthew Bobrowski <mbobrowski@mbobrowski.org>
To: Jan Kara <jack@suse.cz>
Cc: tytso@mit.edu, adilger.kernel@dilger.ca,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
david@fromorbit.com, hch@infradead.org, darrick.wong@oracle.com
Subject: Re: [PATCH v3 4/6] ext4: reorder map.m_flags checks in ext4_iomap_begin()
Date: Tue, 24 Sep 2019 19:35:18 +1000 [thread overview]
Message-ID: <20190924093518.GA17526@bobrowski> (raw)
In-Reply-To: <20190923150856.GE20367@quack2.suse.cz>
On Mon, Sep 23, 2019 at 05:08:56PM +0200, Jan Kara wrote:
> On Thu 12-09-19 21:04:30, Matthew Bobrowski wrote:
> > For iomap direct IO write code path changes, we need to accommodate
> > for the case where the block mapping flags passed to ext4_map_blocks()
> > will result in m_flags having both EXT4_MAP_MAPPED and
> > EXT4_MAP_UNWRITTEN bits set. In order for the allocated unwritten
> > extents to be converted properly in the end_io handler, iomap->type
> > must be set to IOMAP_UNWRITTEN, so we need to reshuffle the
> > conditional statement in order to achieve this.
> >
> > This change is a no-op for DAX code path as the block mapping flag
> > passed to ext4_map_blocks() when IS_DAX(inode) never results in
> > EXT4_MAP_MAPPED and EXT4_MAP_UNWRITTEN being set at once.
> >
> > Signed-off-by: Matthew Bobrowski <mbobrowski@mbobrowski.org>
> > Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
>
> The patch looks good to me. You can add:
>
> Reviewed-by: Jan Kara <jack@suse.cz>
Thank you Jan!
Note that the updated patch series that I'll send through shortly has slightly
changed in the sense that I've split up a whole bunch of the iomap code. The
idea behind this was to reduce the overall clutter that exists within the
->iomap_begin() callback. This was recommended by Christoph, and I really like
the idea because moving forward it makes complete sense to do so. This
specific patch will remain as is though.
--<M>--
next prev parent reply other threads:[~2019-09-24 9:35 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-12 11:03 [PATCH v3 0/6] ext4: port direct IO to iomap infrastructure Matthew Bobrowski
2019-09-12 11:03 ` [PATCH v3 1/6] ext4: introduce direct IO read path using " Matthew Bobrowski
2019-09-16 12:00 ` Christoph Hellwig
2019-09-16 13:07 ` Matthew Bobrowski
2019-09-12 11:04 ` [PATCH v3 2/6] ext4: move inode extension/truncate code out from ext4_iomap_end() Matthew Bobrowski
2019-09-23 16:21 ` Jan Kara
2019-09-24 9:50 ` Matthew Bobrowski
2019-09-24 13:13 ` Jan Kara
2019-09-12 11:04 ` [PATCH v3 3/6] iomap: split size and error for iomap_dio_rw ->end_io Matthew Bobrowski
2019-09-12 11:04 ` [PATCH v3 4/6] ext4: reorder map.m_flags checks in ext4_iomap_begin() Matthew Bobrowski
2019-09-16 12:05 ` Christoph Hellwig
2019-09-17 12:48 ` Matthew Bobrowski
2019-09-23 15:08 ` Jan Kara
2019-09-24 9:35 ` Matthew Bobrowski [this message]
2019-09-12 11:04 ` [PATCH v3 5/6] ext4: introduce direct IO write path using iomap infrastructure Matthew Bobrowski
2019-09-16 4:37 ` Ritesh Harjani
2019-09-16 10:14 ` Matthew Bobrowski
2019-09-16 12:12 ` Christoph Hellwig
2019-09-16 22:37 ` Matthew Bobrowski
2019-09-17 9:00 ` Ritesh Harjani
2019-09-17 9:02 ` Christoph Hellwig
2019-09-17 10:12 ` Ritesh Harjani
2019-09-17 12:39 ` Matthew Bobrowski
2019-09-24 10:57 ` Jan Kara
2019-09-17 9:06 ` Christoph Hellwig
2019-09-17 11:31 ` Matthew Bobrowski
2019-09-20 13:24 ` Matthew Bobrowski
2019-09-23 21:10 ` Jan Kara
2019-09-24 10:29 ` Matthew Bobrowski
2019-09-24 14:13 ` Jan Kara
2019-09-25 7:14 ` Matthew Bobrowski
2019-09-25 8:40 ` Jan Kara
2019-09-12 11:05 ` [PATCH v3 6/6] ext4: cleanup legacy buffer_head direct IO code Matthew Bobrowski
2019-09-16 12:06 ` Christoph Hellwig
2019-09-16 12:53 ` Matthew Bobrowski
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