From: Eric Sandeen <esandeen@redhat.com>
To: Ross Zwisler <ross.zwisler@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>,
"Theodore Ts'o" <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Christoph Hellwig <hch@lst.de>,
Dan Williams <dan.j.williams@intel.com>,
Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.cz>,
linux-ext4@vger.kernel.org, linux-nvdimm@lists.01.org,
linux-xfs@vger.kernel.org
Subject: Re: [PATCH 0/9] add ext4 per-inode DAX flag
Date: Tue, 5 Sep 2017 21:12:35 -0500 [thread overview]
Message-ID: <f856f8fd-3697-adb1-198b-a9ae2fce405f@redhat.com> (raw)
In-Reply-To: <20170905223541.20594-1-ross.zwisler@linux.intel.com>
On 9/5/17 5:35 PM, Ross Zwisler wrote:
> The original intent of this series was to add a per-inode DAX flag to ext4
> so that it would be consistent with XFS. In my travels I found and fixed
> several related issues in both ext4 and XFS.
Hi Ross -
hch had a lot of reasons to nuke the dax flag from orbit, and we just
/disabled/ it in xfs due to its habit of crashing the kernel...
so a couple questions:
1) does this series pass hch's "test the per-inode DAX flag" fstest?
2) do we have an agreement that we need this flag at all, or is this
just a parity item because xfs has^whad a per-inode flag?
Thanks,
-Eric
> I'm not fully happy with the ways that ext4 DAX interacts with conflicting
> features (journaling, inline data and encryption). My goal with this
> series was to make all these interactions as consistent as possilble, and
> of course to make them safe. If anyone has ideas for improvements, I'm
> very open.
>
> Ross Zwisler (9):
> ext4: remove duplicate extended attributes defs
> xfs: always use DAX if mount option is used
> xfs: validate bdev support for DAX inode flag
> ext4: add ext4_should_use_dax()
> ext4: ext4_change_inode_journal_flag error handling
> ext4: safely transition S_DAX on journaling changes
> ext4: prevent data corruption with inline data + DAX
> ext4: add sanity check for encryption + DAX
> ext4: add per-inode DAX flag
>
> fs/ext4/ext4.h | 47 ++++++---------------------------------------
> fs/ext4/ext4_jbd2.h | 16 ++++++++++++++++
> fs/ext4/inline.c | 10 ----------
> fs/ext4/inode.c | 45 ++++++++++++++++++++++++-------------------
> fs/ext4/ioctl.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++--
> fs/ext4/super.c | 8 ++++++++
> fs/xfs/xfs_ioctl.c | 14 +++++++++++---
> 7 files changed, 119 insertions(+), 76 deletions(-)
>
next prev parent reply other threads:[~2017-09-06 2:12 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-05 22:35 [PATCH 0/9] add ext4 per-inode DAX flag Ross Zwisler
2017-09-05 22:35 ` [PATCH 1/9] ext4: remove duplicate extended attributes defs Ross Zwisler
2017-09-06 7:29 ` Jan Kara
2017-09-05 22:35 ` [PATCH 2/9] xfs: always use DAX if mount option is used Ross Zwisler
2017-09-05 22:35 ` [PATCH 3/9] xfs: validate bdev support for DAX inode flag Ross Zwisler
2017-09-05 22:35 ` [PATCH 4/9] ext4: add ext4_should_use_dax() Ross Zwisler
2017-09-05 22:35 ` [PATCH 5/9] ext4: ext4_change_inode_journal_flag error handling Ross Zwisler
2017-09-05 22:35 ` [PATCH 6/9] ext4: safely transition S_DAX on journaling changes Ross Zwisler
2017-09-06 9:47 ` Jan Kara
2017-09-06 17:09 ` Ross Zwisler
2017-09-05 22:35 ` [PATCH 7/9] ext4: prevent data corruption with inline data + DAX Ross Zwisler
2017-09-06 20:55 ` Andreas Dilger
2017-09-06 23:11 ` Ross Zwisler
2017-09-05 22:35 ` [PATCH 8/9] ext4: add sanity check for encryption " Ross Zwisler
2017-09-05 22:35 ` [PATCH 9/9] ext4: add per-inode DAX flag Ross Zwisler
2017-09-06 2:12 ` Eric Sandeen [this message]
2017-09-06 17:07 ` [PATCH 0/9] add ext4 " Ross Zwisler
2017-09-07 20:54 ` Dan Williams
2017-09-07 21:13 ` Ross Zwisler
2017-09-07 21:26 ` Andreas Dilger
2017-09-07 21:51 ` Ross Zwisler
2017-09-07 22:12 ` Dave Chinner
2017-09-07 22:19 ` Ross Zwisler
2017-09-07 23:25 ` Dave Chinner
2017-09-08 9:48 ` Jan Kara
2017-09-08 15:39 ` Theodore Ts'o
2017-09-11 8:47 ` Jan Kara
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