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Date:   Wed, 26 Feb 2020 17:48:38 -0500
From:   Jeff Moyer <>
        Alexander Viro <>,
        "Darrick J. Wong" <>,
        Dan Williams <>,
        Dave Chinner <>,
        Christoph Hellwig <>,
        "Theodore Y. Ts'o" <>, Jan Kara <>,,,
Subject: Re: [PATCH V4 00/13] Enable per-file/per-directory DAX operations V4

Hi, Ira, writes:

> From: Ira Weiny <>
> Changes from V3: 
> 	* Remove global locking...  :-D
> 	* put back per inode locking and remove pre-mature optimizations
> 	* Fix issues with Directories having IS_DAX() set
> 	* Fix kernel crash issues reported by Jeff
> 	* Add some clean up patches
> 	* Consolidate diflags to iflags functions
> 	* Update/add documentation
> 	* Reorder/rename patches quite a bit

I left out patches 1 and 2, but applied the rest and tested.  This
passes xfs tests in the following configurations:
1) MKFS_OPTIONS="-m reflink=0" MOUNT_OPTIONS="-o dax"
2) MKFS_OPTIONS="-m reflink=0"
   but with the added configuration step of setting the dax attribute on
   the mounted test directory.

I also tested to ensure that reflink fails when a file has the dax
attribute set.  I've got more testing to do, but figured I'd at least
let you know I've been looking at it.


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