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tldr/pages/linux/chmem.md
Umair Khurshid f523972d1c
chmem: add page (#16476)
Co-authored-by: CleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>
Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
2025-05-14 09:03:25 +03:00

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# chmem
> Modify the state of memory blocks (online or offline) in a Linux system.
> Typically used in virtualized environments to manage memory hotplug.
> More information: <https://manned.org/chmem>.
- Set a memory block offline:
`sudo chmem {{[-b|--block]}} {{[-d|--disable]}} {{block_number}}`
- Set a memory block online:
`sudo chmem {{[-b|--block]}} {{[-e|--enable]}} {{block_number}}`
- Set a memory range offline using hexadecimal addresses:
`sudo chmem {{[-d|--disable]}} 0x{{start_address}}-0x{{end_address}}`
- Set a memory range online using hexadecimal addresses:
`sudo chmem {{[-e|--enable]}} 0x{{start_address}}-0x{{end_address}}`
- Set memory online and assign it to a specific zone (e.g., Movable):
`sudo chmem {{[-e|--enable]}} 0x{{start_address}} {{[-z|--zone]}} {{Movable}}`
- Display help:
`chmem {{[-h|--help]}}`