Bug 253354

Summary:	Virt-Manager does not allow changing RAM allocation for KVM guest
Product:	[Fedora] Fedora	Reporter:	Jonathan Steffan <jonathansteffan>
Component:	libvirt	Assignee:	Daniel Veillard <veillard>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	low
Version:	7
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-12-01 15:34:05 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jonathan Steffan 2007-08-18 05:04:47 UTC

Description of problem:
Try adjusting a kvm guests RAM allocation.

Version-Release number of selected component (if applicable):
libvirt-0.3.1-2.fc7.x86_64

How reproducible:
Always.

Steps to Reproduce:
1. Run virt-manager
2. Try adjusting RAM for an existing KVM guest.
  
Actual results:
[jon@damaestro ~]$ virt-manager 
libvir: error : this function is not supported by the hypervisor:
virDomainSetMaxMemory
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/details.py", line 448, in
config_memory_apply
    self.vm.set_max_memory(memory*1024)
  File "/usr/share/virt-manager/virtManager/domain.py", line 626, in set_max_memory
    self.vm.setMaxMemory(memory)
  File "/usr/lib64/python2.5/site-packages/libvirt.py", line 321, in setMaxMemory
    if ret == -1: raise libvirtError ('virDomainSetMaxMemory() failed', dom=self)
libvirt.libvirtError: virDomainSetMaxMemory() failed this function is not
supported by the hypervisor: virDomainSetMaxMemory

Expected results:
RAM allocation changes or is not offered as being able to change.

Additional info:

Comment 1 Daniel Berrangé 2007-12-01 15:34:05 UTC

This is not a bug in libvirt. This is a limitation of KVM virtualization - it
has no support for changing guest RAM allocation on the fly.