What is the minimum kernel space memory requirements for a 64 bit machine

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bodisha
Posts: 54
Joined: 2015/06/06 23:55:29

What is the minimum kernel space memory requirements for a 64 bit machine

Post by bodisha » 2019/01/17 15:57:33

I was asked how much memory kernel space takes on a 64 bit machine... Which I was unable to answer.

I've been searching for the last couple days for a definitive answer but have been unable to find anything that clearly says "Linux kernel space takes xxxMb of memory"... I did find something that said kernel space takes up 512 Mb in a 32 bit machine... But finding this answer for a 64 bit has been difficult

I realize kernel space is going to be dependent of the kernel build... I've found some very technical answers on it's maximum size... But I'm hoping someone could give me some guidance of the minimum kernel space requirements

Whoever
Posts: 1357
Joined: 2013/09/06 03:12:10

Re: What is the minimum kernel space memory requirements for a 64 bit machine

Post by Whoever » 2019/01/18 03:39:27

I have a number of CentOS 6 VMs running in 256MB and at least one running with 200MB. You need more to run the installer, but once installed, you can dial it back.

Update: current memory is 200MB. Initial memory (available during boot) is 512MB:

Code: Select all

  <memory unit='KiB'>524288</memory>
  <currentMemory unit='KiB'>204800</currentMemory>
    <memballoon model='virtio'>
    </memballoon>

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