Documentation for ndctl and daxctl


daxctl-list - dump the platform Device-DAX regions, devices, and attributes in json.


daxctl list [<options>]

Walk all the device-dax-regions in the system and list all device instances along with some of their major attributes.

Options can be specified to limit the output to objects of a certain class. Where the classes are regions or devices. By default, daxctl list with no options is equivalent to:

daxctl list --devices


# daxctl list --regions --devices


-r; --region=
A device-dax region is a contiguous range of memory that hosts one or more /dev/daxX.Y devices, where X is the region id and Y is the device instance id. The keyword all can be specified to carry out the operation on every region in the system.

-d; --dev=
Specify a dax device name, <region id>.<instance id> tuple, or keyword all to filter the listing. For example to list the first device instance in region1:

# daxctl list --dev=1.0

-D; --devices
Include device-dax instance info in the listing (default)

-R; --regions
Include region info in the listing

-i; --idle
Include idle (not enabled / zero-sized) devices in the listing

-u; --human
By default daxctl list will output machine-friendly raw-integer data. Instead, with this flag, numbers representing storage size will be formatted as human readable strings with units, other fields are converted to hexadecimal strings. Example:

# daxctl list

# daxctl list –human { “chardev”:”dax1.0”, “size”:”30.57 GiB (32.83 GB)” }


Copyright (c) 2016 - 2018, Intel Corporation. License GPLv2: GNU GPL version 2 This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.