Linux command
chmem 命令
安全
权限或系统影响较大，执行前请核对目标。
常用示例
Set a memory block offline
sudo chmem -b -d [block_number]
Set a memory block online
sudo chmem -b -e [block_number]
Set a memory range offline
sudo chmem -d 0x[start_address]-0x[end_address]
Set a memory range online
sudo chmem -e 0x[start_address]-0x[end_address]
Set memory online in a specific zone
sudo chmem -e 0x[start_address] -z [Movable]
说明
chmem modifies the state of memory blocks in a Linux system, bringing them online or offline. This is primarily used in virtualized environments for memory hotplug operations. Memory blocks are chunks of physical memory that can be individually managed. The tool allows dynamic memory management without rebooting.
参数
- -b, --block
- Operate on memory blocks by block number
- -d, --disable
- Set memory offline
- -e, --enable
- Set memory online
- -z, --zone _zone_
- Assign memory to a specific zone (DMA, DMA32, Normal, Movable)
- -h, --help
- Display help
FAQ
What is the chmem command used for?
chmem modifies the state of memory blocks in a Linux system, bringing them online or offline. This is primarily used in virtualized environments for memory hotplug operations. Memory blocks are chunks of physical memory that can be individually managed. The tool allows dynamic memory management without rebooting.
How do I run a basic chmem example?
Run `sudo chmem -b -d [block_number]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -b, --block do in chmem?
Operate on memory blocks by block number