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DAXCTL-LIST(1) daxctl Manual DAXCTL-LIST(1)


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

"size":3233808384 }

-D, --devices

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

-M, --mappings

Include device-dax instance mappings info in the listing

-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

"size":32828817408 } # daxctl list --human {
"size":"30.57 GiB (32.83 GB)" }


Copyright © 2016 - 2020, 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.

2020-12-22 daxctl