linux-kernel - Re: [PATCH v8 00/16] re-enable DAX PMD support

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Date:   Thu, 27 Oct 2016 08:41:55 -0600
From:   Ross Zwisler <ross.zwisler@...ux.intel.com>
To:     Dave Chinner <david@...morbit.com>
Cc:     linux-kernel@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.cz>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-nvdimm@...ts.01.org,
        linux-xfs@...r.kernel.org
Subject: Re: [PATCH v8 00/16] re-enable DAX PMD support

On Wed, Oct 19, 2016 at 01:34:19PM -0600, Ross Zwisler wrote:
> DAX PMDs have been disabled since Jan Kara introduced DAX radix tree based
> locking.  This series allows DAX PMDs to participate in the DAX radix tree
> based locking scheme so that they can be re-enabled.
> 
> Changes since v7:
>  - Rebased on v4.9-rc1, dropping one ext4 patch that had already been merged.
>  - Added Reviewed-by tags from Jan Kara.
> 
> Here is a tree containing my changes:
> https://git.kernel.org/cgit/linux/kernel/git/zwisler/linux.git/log/?h=dax_pmd_v8
> 
> Ross Zwisler (16):
>   ext4: tell DAX the size of allocation holes
>   dax: remove buffer_size_valid()
>   ext2: remove support for DAX PMD faults
>   dax: make 'wait_table' global variable static
>   dax: remove the last BUG_ON() from fs/dax.c
>   dax: consistent variable naming for DAX entries
>   dax: coordinate locking for offsets in PMD range
>   dax: remove dax_pmd_fault()
>   dax: correct dax iomap code namespace
>   dax: add dax_iomap_sector() helper function
>   dax: dax_iomap_fault() needs to call iomap_end()
>   dax: move RADIX_DAX_* defines to dax.h
>   dax: move put_(un)locked_mapping_entry() in dax.c
>   dax: add struct iomap based DAX PMD support
>   xfs: use struct iomap based DAX PMD fault path
>   dax: remove "depends on BROKEN" from FS_DAX_PMD
> 
>  fs/Kconfig          |   1 -
>  fs/dax.c            | 826 +++++++++++++++++++++++++++++-----------------------
>  fs/ext2/file.c      |  35 +--
>  fs/ext4/inode.c     |   3 +
>  fs/xfs/xfs_aops.c   |  26 +-
>  fs/xfs/xfs_aops.h   |   3 -
>  fs/xfs/xfs_file.c   |  10 +-
>  include/linux/dax.h |  58 +++-
>  mm/filemap.c        |   5 +-
>  9 files changed, 537 insertions(+), 430 deletions(-)
> 
> -- 
> 2.7.4

Ping on this series.  Dave, is the plan still for you to pull this in via the
XFS development tree?  Do you need anything else on my side for this?