CODEWITHSUNDEEP
memory-managementxen
Xingjun Wang
Xingjun Wang

Reputation: 423

Memory not releasing after shutting down vm in Xen-4.5

I installed Xen-4.5.0 on a server with CentOS 6.5(v3.2.30 kernel). All works well except when I shutdown a vm, then xl li shows that the vm's memory is not released and physical memory becomes less and less. What's the reason for this?

Upvotes: 0

Views: 442

Answers (1)

bharat vivek
bharat vivek

Reputation: 31

The VM's memory goes to memory managed by hypervisor. You can see it in the free_memory field of output of xl info.

This memory can be retrieved to the Host/Dom0 by using xm mem-set command.

[root@hypervisor ~]# xm mem-set
    Error: 'xm mem-set' requires 2 arguments.
    Usage: xm mem-set <Domain> <Mem>
    Set the current memory usage for a domain.

Also, please refer http://xen.1045712.n5.nabble.com/memory-not-released-to-dom0-td2598009.html.

Upvotes: 1

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