| 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/ |
