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How to Hot plug CPU in RHEL 5

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Vinay Prashar

Posts: 1689
Nickname: ihackintos
Registered: Jan, 2009

Vinay Prashar is Owner & Author of iHackintosh.com a tech blog focused on OS X, Windows & Linux

How to Hot plug CPU in RHEL 5

Posted: Aug 4, 2009 3:01 AM

This post originated from an RSS feed registered with Web Buzz by Vinay Prashar.
Original Post: How to Hot plug CPU in RHEL 5 Feed Title: iHackintosh Feed URL: http://www.ihackintosh.com/feed/ Feed Description: Yours Daily Tech Savoy	Latest Web Buzz Posts Latest Web Buzz Posts by Vinay Prashar Latest Posts From iHackintosh

Red Hat Enterprise Linux 5 supports the cpu-hotplug mechanism, which allows for CPUs to be dynamically disabled and re-enabled on a system without requiring a system reboot. Note: CPU hot-plugging will only work if physical hotplug is supported by the hardware. In order to disable a CPU core in a running machine, use the file /sys/devices/system/cpu/cpuX/online. The following command will disable a CPU: # echo 0 > /sys/devices/system/cpu/cpuX/online Where X is the ID of the CPU as determined from /proc/cpuinfo. To re-enable the CPU, run: # echo 1 > /sys/devices/system/cpu/cpuX/online Example: The following output from /proc/cpuinfo shows two ...

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