1What: /sys/class/dax/ 2Date: May, 2016 3KernelVersion: v4.7 4Contact: linux-nvdimm@lists.01.org 5Description: Device DAX is the device-centric analogue of Filesystem 6 DAX (CONFIG_FS_DAX). It allows memory ranges to be 7 allocated and mapped without need of an intervening file 8 system. Device DAX is strict, precise and predictable. 9 Specifically this interface: 10 11 1/ Guarantees fault granularity with respect to a given 12 page size (pte, pmd, or pud) set at configuration time. 13 14 2/ Enforces deterministic behavior by being strict about 15 what fault scenarios are supported. 16 17 The /sys/class/dax/ interface enumerates all the 18 device-dax instances in the system. The ABI is 19 deprecated and will be removed after 2020. It is 20 replaced with the DAX bus interface /sys/bus/dax/ where 21 device-dax instances can be found under 22 /sys/bus/dax/devices/ 23