这篇文章解释了如何使用内存热插拔来增加/减少内存。

要查看内存部分的（在线/离线）状态，请阅读“state”文件。

# grep line /sys/devices/system/memory/*/state
/sys/devices/system/memory/memory0/state:online
/sys/devices/system/memory/memory1/state:online
/sys/devices/system/memory/memory2/state:online
/sys/devices/system/memory/memory3/state:online
/sys/devices/system/memory/memory4/state:online

将 memory[x] 设置为在线/离线：

# echo online > /sys/devices/system/memory/memory[number]/state
# echo offline > /sys/devices/system/memory/memory[number]/state

要验证当前状态：

# free -m

可以在以下位置找到更多详细信息：/usr/share/doc/kernel-doc-*/Documentation/memory-hotplug.txt