4 Contact: linux-nvdimm@lists.01.org
5 Description: 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:
11 1/ Guarantees fault granularity with respect to a given
12 page size (pte, pmd, or pud) set at configuration time.
14 2/ Enforces deterministic behavior by being strict about
15 what fault scenarios are supported.
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