• Linus Torvalds's avatar
    Merge tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · f0c98ebc
    Linus Torvalds authored
    Pull libnvdimm updates from Dan Williams:
    
     - Replace pcommit with ADR / directed-flushing.
    
       The pcommit instruction, which has not shipped on any product, is
       deprecated.  Instead, the requirement is that platforms implement
       either ADR, or provide one or more flush addresses per nvdimm.
    
       ADR (Asynchronous DRAM Refresh) flushes data in posted write buffers
       to the memory controller on a power-fail event.
    
       Flush addresses are defined in ACPI 6.x as an NVDIMM Firmware
       Interface Table (NFIT) sub-structure: "Flush Hint Address Structure".
       A flush hint is an mmio address that when written and fenced assures
       that all previous posted writes targeting a given dimm have been
       flushed to media.
    
     - On-demand ARS (address range scrub).
    
       Linux uses the results of the ACPI ARS commands to track bad blocks
       in pmem devices.  When latent errors are detected we re-scrub the
       media to refresh the bad block list, userspace can also request a
       re-scrub at any time.
    
     - Support for the Microsoft DSM (device specific method) command
       format.
    
     - Support for EDK2/OVMF virtual disk device memory ranges.
    
     - Various fixes and cleanups across the subsystem.
    
    * tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (41 commits)
      libnvdimm-btt: Delete an unnecessary check before the function call "__nd_device_register"
      nfit: do an ARS scrub on hitting a latent media error
      nfit: move to nfit/ sub-directory
      nfit, libnvdimm: allow an ARS scrub to be triggered on demand
      libnvdimm: register nvdimm_bus devices with an nd_bus driver
      pmem: clarify a debug print in pmem_clear_poison
      x86/insn: remove pcommit
      Revert "KVM: x86: add pcommit support"
      nfit, tools/testing/nvdimm/: unify shutdown paths
      libnvdimm: move ->module to struct nvdimm_bus_descriptor
      nfit: cleanup acpi_nfit_init calling convention
      nfit: fix _FIT evaluation memory leak + use after free
      tools/testing/nvdimm: add manufacturing_{date|location} dimm properties
      tools/testing/nvdimm: add virtual ramdisk range
      acpi, nfit: treat virtual ramdisk SPA as pmem region
      pmem: kill __pmem address space
      pmem: kill wmb_pmem()
      libnvdimm, pmem: use nvdimm_flush() for namespace I/O writes
      fs/dax: remove wmb_pmem()
      libnvdimm, pmem: flush posted-write queues on shutdown
      ...
    f0c98ebc
device-mapper.h 17.2 KB