Re: [Xen-users] Allocate more Memory than real

["Artur Baruchi" <mail.baruchi@xxxxxxxxx>]

Forget my answers... I discovered what is..
The free command uses /proc/meminfo to get memory information... this
entry, uses the totalram_pages and this "variable" is updated by
balloon...
Its more efficient than memory hotplug, since hotplug works just large
amount of memory..

Anyway.. thanks!

Att.
Artur Baruchi


On Wed, Sep 17, 2008 at 8:46 PM, Artur Baruchi <mail.baruchi@xxxxxxxxx> wrote:
> I did the same thing using xen 3.2 latter. I retrieve some memory and
> create new guests. The sum of all domU's memory is greater than real
> memory.
> And, I saw something nice... when I return some memory to xen the
> guest see this and update the memory available to the SO, for example,
> If the guest has 1gb and I use commands like "free" or "top", I see
> 1gb. When I return 512M to xen, this commands show me an updated value
> of 512M of available memory.
>
> So... Does xen implement some kind of Hotplug Memory for
> paravirtualized guests?
>
> And thanks for the last paper... I got some ideas from there...
>
> Att.
> Artur Baruchi
>
>
> On Sat, Sep 13, 2008 at 8:43 PM, Todd Deshane <deshantm@xxxxxxxxx> wrote:
>> Xen 3.3 supports memory overcommitment now.
>>
>> see:
>> http://blog.xen.org/index.php/2008/08/27/xen-33-feature-memory-overcommit/
>>
>> Cheers,
>> Todd
>>
>>
>> --
>> Todd Deshane
>> http://todddeshane.net
>> check out our book: http://runningxen.com
>>
>

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