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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]}}