| 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/ |