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| author | Dan Williams <dan.j.williams@intel.com> | 2017-04-11 09:49:49 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-04-12 21:59:14 -0700 |
| commit | 7b6be8444e0f0dd675b54d059793423d3c9b4c03 (patch) | |
| tree | b2782a46dda7b03fac23216f873b1a6bf1df58cb /drivers/Makefile | |
| parent | 5f0694b300b9fb8409272c550418c22e0e57314a (diff) | |
| download | lwn-7b6be8444e0f0dd675b54d059793423d3c9b4c03.tar.gz lwn-7b6be8444e0f0dd675b54d059793423d3c9b4c03.zip | |
dax: refactor dax-fs into a generic provider of 'struct dax_device' instances
We want dax capable drivers to be able to publish a set of dax
operations [1]. However, we do not want to further abuse block_devices
to advertise these operations. Instead we will attach these operations
to a dax device and add a lookup mechanism to go from block device path
to a dax device. A dax capable driver like pmem or brd is responsible
for registering a dax device, alongside a block device, and then a dax
capable filesystem is responsible for retrieving the dax device by path
name if it wants to call dax_operations.
For now, we refactor the dax pseudo-fs to be a generic facility, rather
than an implementation detail, of the device-dax use case. Where a "dax
device" is just an inode + dax infrastructure, and "Device DAX" is a
mapping service layered on top of that base 'struct dax_device'.
"Filesystem DAX" is then a mapping service that layers a filesystem on
top of that same base device. Filesystem DAX is associated with a
block_device for now, but perhaps directly to a dax device in the
future, or for new pmem-only filesystems.
[1]: https://lkml.org/lkml/2017/1/19/880
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/Makefile')
| -rw-r--r-- | drivers/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/Makefile b/drivers/Makefile index 2eced9afba53..0442e982cf35 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -71,7 +71,7 @@ obj-$(CONFIG_PARPORT) += parport/ obj-$(CONFIG_NVM) += lightnvm/ obj-y += base/ block/ misc/ mfd/ nfc/ obj-$(CONFIG_LIBNVDIMM) += nvdimm/ -obj-$(CONFIG_DEV_DAX) += dax/ +obj-$(CONFIG_DAX) += dax/ obj-$(CONFIG_DMA_SHARED_BUFFER) += dma-buf/ obj-$(CONFIG_NUBUS) += nubus/ obj-y += macintosh/ |