I have one question on Hyper-threading ,Is it possible to enable/disable hyper-threading without using bios settings e.g. using syscfg and without rebooting server ? because i'm working with plenty of servers so it is not possible to enable individual server for HT it needs time and lots of work.
need some suggestions.
Regarding your question, "if there is a way to enable Hyper-threading without having to reboot the server". I am afraid this is hard to say if you going to need or not a reboot for Hyper-Threading enabled. This because if the motherboard BIOS has the option Disable, then you will need to reboot the to enter the BIOS and enable it. If you get a BIOS update that will enable by default the Hyper-Threading, you still need to reboot for the changes to take effect. And depending on the OS, the Hyper-Threading enable settings, and you still will need to reboot for the Registry or Kernel to take full functionality on the changes.
Then I am afraid to say that yes you will need to reboot.
If there is anything else we can help please feel free to ask.