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Does someone know, if the underlying hardware supports memory hotplug, in Linux is supported without reboot?

Especially in Centos 6.x(x86_64).

Thanks

etcshad0vv
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1 Answers1

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It is supported in RHEL 6.x (try to use >6.0) but I would strongly urge you to install all of the drivers from your server vendor first. In HP servers this is easy and certainly 6.7 x64 works fine with this.

Chopper3
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  • Thanks for your reply. I didn't understand the point for installing all of the drivers from server vendor, apart from the loaded modules of the kernel what else? – etcshad0vv Dec 11 '15 at 16:32
  • Well in the HP case it adds drivers and tools for dealing with hotplug memory, hotplug CPUs, IO devices etc - not sure you'll need them but why not eh? – Chopper3 Dec 11 '15 at 16:36
  • Ok i see. The memory will be recognized in tha OS without any action from my side? – etcshad0vv Dec 11 '15 at 16:42
  • again it depends on your vendor, you've still not mentioned who it is - not every system can do this of course - but if it's supported then it's probably supported with the latest firmware and drivers. – Chopper3 Dec 11 '15 at 16:48
  • yes sorry i missed it, it is for hp blade proliant g460c gen8/9. – etcshad0vv Dec 11 '15 at 17:00
  • erm....how do you intend to hot-add the memory then if it's a blade?????? – Chopper3 Dec 11 '15 at 17:03
  • Sorry i thought it is possible but yes it isn't. But if it was an HP rack mounted server, in the OS would be visible after the plugging? – etcshad0vv Dec 11 '15 at 17:06
  • Yep, most DL3xx-5xx and DL980's can do that yes - not the lesser boxes though. – Chopper3 Dec 11 '15 at 17:14