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- What: /sys/class/dax/
- Date: May, 2016
- KernelVersion: v4.7
- Contact: linux-nvdimm@lists.01.org
- Description: 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:
- 1. Guarantees fault granularity with respect to a given
- page size (pte, pmd, or pud) set at configuration time.
- 2. Enforces deterministic behavior by being strict about
- what fault scenarios are supported.
- The /sys/class/dax/ interface enumerates all the
- device-dax instances in the system. The ABI is
- deprecated and will be removed after 2020. It is
- replaced with the DAX bus interface /sys/bus/dax/ where
- device-dax instances can be found under
- /sys/bus/dax/devices/
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