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Re: [Xen-devel] pvops and maxmem

To: Rafal Wojtczuk <rafal@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] pvops and maxmem
From: Daniel Kiper <dkiper@xxxxxxxxxxxx>
Date: Tue, 24 Aug 2010 21:53:19 +0200
Cc: jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, dan.magenheimer@xxxxxxxxxx, v.tolstov@xxxxxxxxx, konrad.wilk@xxxxxxxxxx
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On Tue, Aug 24, 2010 at 04:28:13PM +0200, Rafal Wojtczuk wrote:
> Hello,
> Could someone let me know whether anything has changed since
> http://lists.xensource.com/archives/html/xen-devel/2010-06/msg00099.html
> that is, whether there exists any version of pvops kernel that honours the
> "maxmem" domain parameter and thus it can be ballooned above the initially
> assigned memory amount ("memory=" parameter) ?
> If not, is this something to be implemented someday (any ETA?), or are there
> any disadvantages of supporting this feature ?

Yes, it has changed. There is memory hotplug feature under
development. Current fully working version is available at
repository, xen/memory-hotplug head (Linux Kernel Ver. 2.6.34).
Patch for Linux Kernel Ver. is available at
As I know memory hotplug is not working correctly with tmem now.
I am going to change that. Additionally, my goal is to include
memory hotplug support in mainline Linux Kernel.

If you have any questions please drop me a line.


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