NAME
NAME
cxl-set-partition - set the partitioning between volatile and persistent capacity on a CXL memdev
SYNOPSIS
cxl set-partition <mem0> [ [<mem1>..<memN>] [<options>]
DESCRIPTION
CXL devices may support both volatile and persistent memory capacity. The amount of device capacity set aside for each type is typically established at the factory, but some devices also allow for dynamic re-partitioning.
Use this command to partition a device into volatile and persistent capacity. The change in partitioning becomes the “next” configuration, to become active on the next device reset.
Use “cxl list -m <memdev> -I” to examine the partitioning capabilities of a device. A partition_alignment_size value of zero means there is no available capacity and therefore the partitions cannot be changed.
Using this command to change the size of the persistent capacity shall result in the loss of data stored.
OPTIONS
<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.
-b; --bus=
Restrict the operation to the specified bus.
-t; --type=
Type of partition, pmem or ram (volatile), to modify. Default:
pmem
-s; --size=
Size of the <type> partition in bytes. Size must align to the devices
alignment requirement. Use cxl list -m <memdev> -I to find
partition_alignment_size, or, use the –align option. Default: All
available capacity is assigned to <type>.
-a; --align
Select this option to allow the automatic alignment of –size to meet
device alignment requirements. When using this option, specify the
minimum –size of the –type partition needed. When this option is
omitted, the command fails if –size is not properly aligned. Use cxl
list -m <memdev> -I to examine the partition_alignment_size.
-v
Turn on verbose debug messages in the library (if libcxl was built with
logging and debug enabled).
COPYRIGHT
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.
SEE ALSO
cxl-list, CXL-2.0 8.2.9.5.2