• Linus Torvalds's avatar
    Merge tag 'libnvdimm-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · 1f40c495
    Linus Torvalds authored
    Pull libnvdimm updates from Dan Williams:
     "The bulk of this update was stabilized before the merge window and
      appeared in -next.  The "device dax" implementation was revised this
      week in response to review feedback, and to address failures detected
      by the recently expanded ndctl unit test suite.
      Not included in this pull request are two dax topic branches (dax
      error handling, and dax radix-tree locking).  These topics were
      deferred to get a few more days of -next integration testing, and to
      coordinate a branch baseline with Ted and the ext4 tree.  Vishal and
      Ross will send the error handling and locking topics respectively in
      the next few days.
      This branch has received a positive build result from the kbuild robot
      across 226 configs.
       - Device DAX for persistent memory: Device DAX is the device-centric
         analogue of Filesystem DAX (CONFIG_FS_DAX).  It allows memory
         ranges to be allocated and mapped without need of an intervening
         file system.  Device DAX is strict, precise and predictable.
         Specifically this interface:
          a) Guarantees fault granularity with respect to a given page size
             (pte, pmd, or pud) set at configuration time.
          b) Enforces deterministic behavior by being strict about what
             fault scenarios are supported.
         Persistent memory is the first target, but the mechanism is also
         targeted for exclusive allocations of performance/feature
         differentiated memory ranges.
       - Support for the HPE DSM (device specific method) command formats.
         This enables management of these first generation devices until a
         unified DSM specification materializes.
       - Further ACPI 6.1 compliance with support for the common dimm
         identifier format.
       - Various fixes and cleanups across the subsystem"
    * tag 'libnvdimm-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (40 commits)
      libnvdimm, dax: fix deletion
      libnvdimm, dax: fix alignment validation
      libnvdimm, dax: autodetect support
      libnvdimm: release ida resources
      Revert "block: enable dax for raw block devices"
      /dev/dax, core: file operations and dax-mmap
      /dev/dax, pmem: direct access to persistent memory
      libnvdimm: stop requiring a driver ->remove() method
      libnvdimm, dax: record the specified alignment of a dax-device instance
      libnvdimm, dax: reserve space to store labels for device-dax
      libnvdimm, dax: introduce device-dax infrastructure
      nfit: add sysfs dimm 'family' and 'dsm_mask' attributes
      tools/testing/nvdimm: ND_CMD_CALL support
      nfit: disable vendor specific commands
      nfit: export subsystem ids as attributes
      nfit: fix format interface code byte order per ACPI6.1
      nfit, libnvdimm: limited/whitelisted dimm command marshaling mechanism
      nfit, libnvdimm: clarify "commands" vs "_DSMs"
      libnvdimm: increase max envelope size for ioctl
      acpi/nfit: Add sysfs "id" for NVDIMM ID
huge_memory.c 92.6 KB