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From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Mike Snitzer <snitzer@redhat.com>,
	Dave Jiang <dave.jiang@intel.com>,
	Toshi Kani <toshi.kani@hpe.com>,
	linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org,
	linux-xfs@vger.kernel.org, dm-devel@redhat.com,
	linux-fsdevel@vger.kernel.org,
	Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [dm-devel] [PATCH v2 2/7] dax: change bdev_dax_supported() to support boolean returns
Date: Fri, 1 Jun 2018 14:59:50 -0600	[thread overview]
Message-ID: <20180601205950.GA12821@linux.intel.com> (raw)
In-Reply-To: <20180531222645.GA6086@magnolia>

On Thu, May 31, 2018 at 03:26:45PM -0700, Darrick J. Wong wrote:
> On Thu, May 31, 2018 at 04:52:06PM -0400, Mike Snitzer wrote:
> > On Thu, May 31 2018 at  3:13pm -0400,
> > Darrick J. Wong <darrick.wong@oracle.com> wrote:
> > 
> > > On Tue, May 29, 2018 at 04:01:14PM -0600, Ross Zwisler wrote:
> > > > On Tue, May 29, 2018 at 02:25:10PM -0700, Darrick J. Wong wrote:
> > > > > On Tue, May 29, 2018 at 01:51:01PM -0600, Ross Zwisler wrote:
> > > > > > From: Dave Jiang <dave.jiang@intel.com>
> > > > > > 
> > > > > > The function return values are confusing with the way the function is
> > > > > > named. We expect a true or false return value but it actually returns
> > > > > > 0/-errno.  This makes the code very confusing. Changing the return values
> > > > > > to return a bool where if DAX is supported then return true and no DAX
> > > > > > support returns false.
> > > > > > 
> > > > > > Signed-off-by: Dave Jiang <dave.jiang@intel.com>
> > > > > > Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
> > > > > 
> > > > > Looks ok, do you want me to pull the first two patches through the xfs
> > > > > tree?
> > > > > 
> > > > > Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
> > > > 
> > > > Thanks for the review.
> > > > 
> > > > I'm not sure what's best.  If you do that then Mike will need to have a DM
> > > > branch for the rest of the series based on your stable commits, yea?
> > > > 
> > > > Mike what would you prefer?
> > > 
> > > I /was/ about to say that I would pull in the first two patches, but now
> > > I can't get xfs to mount with pmem at all, and have no way of testing
> > > this...?
> > 
> > Once you get this sorted out, please feel free to pull in the first 2.
> 
> Sorted.  It'll be in Friday's for-next.  Ross helped me bang on the pmem
> devices w/ ndctl to enable fsdax mode and twist qemu until everything
> worked properly. ;)

For anyone else who would like to simulate persistent memory using QEMU, I've
added some hints here:

https://nvdimm.wiki.kernel.org/pmem_in_qemu

  reply	other threads:[~2018-06-01 20:59 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-29 19:50 [PATCH v2 0/7] Fix DM DAX handling Ross Zwisler
2018-05-29 19:51 ` [PATCH v2 1/7] fs: allow per-device dax status checking for filesystems Ross Zwisler
2018-05-29 19:51 ` [PATCH v2 2/7] dax: change bdev_dax_supported() to support boolean returns Ross Zwisler
2018-05-29 21:25   ` Darrick J. Wong
2018-05-29 22:01     ` Ross Zwisler
2018-05-31 19:13       ` Darrick J. Wong
2018-05-31 20:34         ` Ross Zwisler
2018-05-31 20:35         ` Dan Williams
2018-05-31 20:41         ` Ross Zwisler
2018-05-31 20:52         ` Mike Snitzer
2018-05-31 22:26           ` [dm-devel] " Darrick J. Wong
2018-06-01 20:59             ` Ross Zwisler [this message]
2018-06-01  1:26         ` Dave Chinner
2018-06-01  1:57           ` Dan Williams
2018-06-01  2:24             ` Dave Chinner
2018-06-01  4:02               ` Dan Williams
2018-06-03 22:20                 ` Dave Chinner
2018-06-04  0:25                   ` Dave Chinner
2018-06-04  1:48                     ` Dan Williams
2018-06-04 23:40                       ` Dan Williams
2018-06-05  0:33                         ` Mike Snitzer
2018-06-05  5:55                           ` Dave Chinner
2018-06-05  3:32                         ` Dan Williams
2018-05-29 19:51 ` [PATCH v2 3/7] dm: fix test for DAX device support Ross Zwisler
2018-06-01 20:19   ` Mike Snitzer
2018-06-01 20:46     ` Mike Snitzer
2018-06-01 21:11       ` Ross Zwisler
2018-06-01 21:16       ` Dan Williams
2018-05-29 19:51 ` [PATCH v2 4/7] dm: prevent DAX mounts if not supported Ross Zwisler
2018-06-01 21:55   ` Mike Snitzer
2018-06-04 23:15     ` Ross Zwisler
2018-06-20 15:17       ` Mike Snitzer
2018-06-25 19:20         ` Ross Zwisler
2018-05-29 19:51 ` [PATCH v2 5/7] dm: remove DM_TYPE_DAX_BIO_BASED dm_queue_mode Ross Zwisler
2018-06-01 22:04   ` Mike Snitzer
2018-06-04 23:24     ` Ross Zwisler
2018-06-04 23:49       ` Kani, Toshi
2018-06-05  0:46       ` Mike Snitzer
2018-06-06 17:24         ` Ross Zwisler
2018-06-06 22:29           ` Mike Snitzer
2018-05-29 19:51 ` [PATCH v2 6/7] dm-snap: remove unnecessary direct_access() stub Ross Zwisler
2018-05-29 19:51 ` [PATCH v2 7/7] dm-error: " Ross Zwisler

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