CXL-READ-LABELS(1) cxl Manual CXL-READ-LABELS(1)

cxl-read-labels - read out the label area on a CXL memdev

cxl read-labels <mem0> [<mem1>..<memN>] [<options>]

The region label area is a small persistent partition of capacity available on some CXL memory devices. The label area is used to and configure or determine the set of memory devices participating in different interleave sets. This command dumps the raw binary data in a memdev’s label area to stdout or a file. In the multi-memdev case the data is concatenated.

<memory device(s)>

A memX device name, or a memdev id number. Restrict the operation to the specified memdev(s). The keyword all can be specified to indicate the lack of any restriction.

-S, --serial

Rather an a memdev id number, interpret the <memdev> argument(s) as a list of serial numbers.

-s, --size=

Limit the operation to the given number of bytes. A size of 0 indicates to operate over the entire label capacity.

-O, --offset=

Begin the operation at the given offset into the label area.

-v

Turn on verbose debug messages in the library (if libcxl was built with logging and debug enabled).

-b, --bus=

Restrict the operation to the specified bus.

-o, --output

output file

Copyright © 2016 - 2022, Intel Corporation. License GPLv2: GNU GPL version 2 http://gnu.org/licenses/gpl.html. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

cxl-write-labels(1), cxl-zero-labels(1), CXL-2.0 9.13.2

2026-06-30 cxl