| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] ballon driver interaction with native page allocator.
> if Balloon driver is not present in the guest OS then how xen control
> the memory of the that Guest OS
It can't; Xen depends on guest OS co-operation in order to resize the guest's
physical memory footprint.
> or there is some other mechanism also with which the guest OS page
> allocator can inftate or deflate the balloon.
The balloon can be controlled from outside Xen using xm mem-set. It can also
be controlled within the guest by echoing something into a special file. If
there's no balloon driver, there's no way to change the memory footprint (as
of 3.1 the balloon driver can work in HVM, though).
Other hypervisors / virtual machine software is able to page guest memory out
to disk in order to vary the machine RAM allocation used by each guest; Xen
doesn't do this.
Cheers,
Mark
--
Dave: Just a question. What use is a unicyle with no seat? And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home