decouple DAX from block devices · Christoph Hellwig <hch@lst.de> · 2021-11-09
[PATCH 01/29] nvdimm/pmem: move dax_attribute_group from dax to pmem · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 01/29] nvdimm/pmem: move dax_attribute_group from dax to pmem · Dan Williams <hidden> · 2021-11-17
Re: [PATCH 01/29] nvdimm/pmem: move dax_attribute_group from dax to pmem · Christoph Hellwig <hch@lst.de> · 2021-11-19
Re: [PATCH 01/29] nvdimm/pmem: move dax_attribute_group from dax to pmem · Dan Williams <hidden> · 2021-11-19
[PATCH 03/29] dax: remove CONFIG_DAX_DRIVER · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 03/29] dax: remove CONFIG_DAX_DRIVER · Dan Williams <hidden> · 2021-11-17
Re: [PATCH 03/29] dax: remove CONFIG_DAX_DRIVER · Dan Williams <hidden> · 2021-11-23
[PATCH 02/29] dm: make the DAX support dependend on CONFIG_FS_DAX · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 02/29] dm: make the DAX support dependend on CONFIG_FS_DAX · Dan Williams <hidden> · 2021-11-17
Re: [PATCH 02/29] dm: make the DAX support dependend on CONFIG_FS_DAX · Christoph Hellwig <hch@lst.de> · 2021-11-19
Re: [PATCH 02/29] dm: make the DAX support dependend on CONFIG_FS_DAX · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 02/29] dm: make the DAX support dependend on CONFIG_FS_DAX · Christoph Hellwig <hch@lst.de> · 2021-11-23
[PATCH 04/29] dax: simplify the dax_device <-> gendisk association · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 04/29] dax: simplify the dax_device <-> gendisk association · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 04/29] dax: simplify the dax_device <-> gendisk association · Christoph Hellwig <hch@lst.de> · 2021-11-23
Re: [PATCH 04/29] dax: simplify the dax_device <-> gendisk association · Dan Williams <hidden> · 2021-11-23
[PATCH 06/29] dax: move the partition alignment check into fs_dax_get_by_bdev · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 06/29] dax: move the partition alignment check into fs_dax_get_by_bdev · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 06/29] dax: move the partition alignment check into fs_dax_get_by_bdev · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 06/29] dax: move the partition alignment check into fs_dax_get_by_bdev · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 05/29] dax: remove the pgmap sanity checks in generic_fsdax_supported · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 05/29] dax: remove the pgmap sanity checks in generic_fsdax_supported · Dan Williams <hidden> · 2021-11-23
[PATCH 08/29] dax: remove dax_capable · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 08/29] dax: remove dax_capable · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 08/29] dax: remove dax_capable · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 08/29] dax: remove dax_capable · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 07/29] xfs: factor out a xfs_setup_dax_always helper · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 07/29] xfs: factor out a xfs_setup_dax_always helper · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
Re: [PATCH 07/29] xfs: factor out a xfs_setup_dax_always helper · Dan Williams <hidden> · 2021-11-23
[PATCH 09/29] dm-linear: add a linear_dax_pgoff helper · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 09/29] dm-linear: add a linear_dax_pgoff helper · Dan Williams <hidden> · 2021-11-23
[PATCH 10/29] dm-log-writes: add a log_writes_dax_pgoff helper · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 10/29] dm-log-writes: add a log_writes_dax_pgoff helper · Dan Williams <hidden> · 2021-11-23
[PATCH 13/29] fsdax: use a saner calling convention for copy_cow_page_dax · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 13/29] fsdax: use a saner calling convention for copy_cow_page_dax · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 13/29] fsdax: use a saner calling convention for copy_cow_page_dax · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
[PATCH 11/29] dm-stripe: add a stripe_dax_pgoff helper · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 11/29] dm-stripe: add a stripe_dax_pgoff helper · Dan Williams <hidden> · 2021-11-23
[PATCH 12/29] fsdax: remove a pointless __force cast in copy_cow_page_dax · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 12/29] fsdax: remove a pointless __force cast in copy_cow_page_dax · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 12/29] fsdax: remove a pointless __force cast in copy_cow_page_dax · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
[PATCH 16/29] fsdax: simplify the offset check in dax_iomap_zero · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 16/29] fsdax: simplify the offset check in dax_iomap_zero · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 16/29] fsdax: simplify the offset check in dax_iomap_zero · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
[PATCH 14/29] fsdax: simplify the pgoff calculation · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 14/29] fsdax: simplify the pgoff calculation · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 14/29] fsdax: simplify the pgoff calculation · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 14/29] fsdax: simplify the pgoff calculation · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 15/29] xfs: add xfs_zero_range and xfs_truncate_page helpers · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 15/29] xfs: add xfs_zero_range and xfs_truncate_page helpers · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 15/29] xfs: add xfs_zero_range and xfs_truncate_page helpers · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
[PATCH 18/29] fsdax: decouple zeroing from the iomap buffered I/O code · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 18/29] fsdax: decouple zeroing from the iomap buffered I/O code · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 18/29] fsdax: decouple zeroing from the iomap buffered I/O code · Christoph Hellwig <hch@lst.de> · 2021-11-24
Re: [PATCH 18/29] fsdax: decouple zeroing from the iomap buffered I/O code · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 18/29] fsdax: decouple zeroing from the iomap buffered I/O code · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 21/29] xfs: move dax device handling into xfs_{alloc,free}_buftarg · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 21/29] xfs: move dax device handling into xfs_{alloc,free}_buftarg · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 21/29] xfs: move dax device handling into xfs_{alloc,free}_buftarg · Dan Williams <hidden> · 2021-11-24
Re: [PATCH 21/29] xfs: move dax device handling into xfs_{alloc,free}_buftarg · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-24
Re: [PATCH 21/29] xfs: move dax device handling into xfs_{alloc,free}_buftarg · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 17/29] fsdax: factor out a dax_memzero helper · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 17/29] fsdax: factor out a dax_memzero helper · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 17/29] fsdax: factor out a dax_memzero helper · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 17/29] fsdax: factor out a dax_memzero helper · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 19/29] ext2: cleanup the dax handling in ext2_fill_super · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 19/29] ext2: cleanup the dax handling in ext2_fill_super · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 19/29] ext2: cleanup the dax handling in ext2_fill_super · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
[PATCH 22/29] iomap: add a IOMAP_DAX flag · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 22/29] iomap: add a IOMAP_DAX flag · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 22/29] iomap: add a IOMAP_DAX flag · Dan Williams <hidden> · 2021-11-24
Re: [PATCH 22/29] iomap: add a IOMAP_DAX flag · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 20/29] ext4: cleanup the dax handling in ext4_fill_super · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 20/29] ext4: cleanup the dax handling in ext4_fill_super · Dan Williams <hidden> · 2021-11-23
Re: [PATCH 20/29] ext4: cleanup the dax handling in ext4_fill_super · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 20/29] ext4: cleanup the dax handling in ext4_fill_super · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 24/29] xfs: use xfs_direct_write_iomap_ops for DAX zeroing · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 24/29] xfs: use xfs_direct_write_iomap_ops for DAX zeroing · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 24/29] xfs: use xfs_direct_write_iomap_ops for DAX zeroing · Dan Williams <hidden> · 2021-11-24
[PATCH 25/29] dax: return the partition offset from fs_dax_get_by_bdev · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 25/29] dax: return the partition offset from fs_dax_get_by_bdev · Dan Williams <hidden> · 2021-11-24
Re: [PATCH 25/29] dax: return the partition offset from fs_dax_get_by_bdev · Christoph Hellwig <hch@lst.de> · 2021-11-24
[PATCH 23/29] xfs: use IOMAP_DAX to check for DAX mappings · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 23/29] xfs: use IOMAP_DAX to check for DAX mappings · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 23/29] xfs: use IOMAP_DAX to check for DAX mappings · Christoph Hellwig <hch@lst.de> · 2021-11-24
Re: [PATCH 23/29] xfs: use IOMAP_DAX to check for DAX mappings · Dan Williams <hidden> · 2021-11-24
[PATCH 26/29] fsdax: shift partition offset handling into the file systems · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 26/29] fsdax: shift partition offset handling into the file systems · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 26/29] fsdax: shift partition offset handling into the file systems · Dan Williams <hidden> · 2021-11-24
Re: [PATCH 26/29] fsdax: shift partition offset handling into the file systems · Gao Xiang <hidden> · 2021-11-24
[PATCH 28/29] iomap: build the block based code conditionally · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 28/29] iomap: build the block based code conditionally · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 28/29] iomap: build the block based code conditionally · Dan Williams <hidden> · 2021-11-24
[PATCH 29/29] fsdax: don't require CONFIG_BLOCK · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 29/29] fsdax: don't require CONFIG_BLOCK · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 29/29] fsdax: don't require CONFIG_BLOCK · Dan Williams <hidden> · 2021-11-24
[PATCH 27/29] dax: fix up some of the block device related ifdefs · Christoph Hellwig <hch@lst.de> · 2021-11-09
Re: [PATCH 27/29] dax: fix up some of the block device related ifdefs · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-23
Re: [PATCH 27/29] dax: fix up some of the block device related ifdefs · Dan Williams <hidden> · 2021-11-24

Re: [PATCH 22/29] iomap: add a IOMAP_DAX flag

From: Christoph Hellwig <hch@lst.de>
Date: 2021-11-24 07:10:36
Also in: dm-devel, linux-fsdevel, linux-s390, linux-xfs, nvdimm, virtualization

On Tue, Nov 23, 2021 at 06:47:10PM -0800, Dan Williams wrote:

On Tue, Nov 9, 2021 at 12:34 AM Christoph Hellwig [off-list ref] wrote:

quoted

Add a flag so that the file system can easily detect DAX operations.

Looks ok, but I would have preferred a quick note about the rationale
here before needing to read other patches to figure that out.

The reason is to only apply the DAX partition offsets to actual DAX
operations, and not to e.g. fiemap.  I'll document that more clearly.

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