[pve-devel] pve-manager : expose balloon to gui

[Alexandre DERUMIER]

>>You already saw the patches on the qemu list to query free space with balloon driver? 
Oh, I don't know. is it possible ? 
>>Maybe we can use that somehow? 

maybe query-balloon ?

I see : free_mem && total_mem . is it the guest total free_mem & total_mem ?
I look at it.

query-balloon
-------------

Show balloon information.

Make an asynchronous request for balloon info. When the request completes a
json-object will be returned containing the following data:

- "actual": current balloon value in bytes (json-int)
- "mem_swapped_in": Amount of memory swapped in bytes (json-int, optional)
- "mem_swapped_out": Amount of memory swapped out in bytes (json-int, optional)
- "major_page_faults": Number of major faults (json-int, optional)
- "minor_page_faults": Number of minor faults (json-int, optional)
- "free_mem": Total amount of free and unused memory in
              bytes (json-int, optional)
- "total_mem": Total amount of available memory in bytes (json-int, optional)

Example:

-> { "execute": "query-balloon" }
<- {
      "return":{
         "actual":1073741824,
         "mem_swapped_in":0,
         "mem_swapped_out":0,
         "major_page_faults":142,
         "minor_page_faults":239245,
         "free_mem":1014185984,
         "total_mem":1044668416
      }
   }

----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mercredi 5 Décembre 2012 13:08:21 
Objet: RE: [pve-devel] pve-manager : expose balloon to gui 

> >>You can easily crash your VM with this - I am quite unsure if I want that on 
> the GUI? 
> 
> Well, maybe can we set min value to something safe ? (as yes, setting it to 
> 16MB, and I'm pretty sure it'll crash ;) 
> 
> Or maybe an option to display on/off the balloon feature in gui ? (or 
> something like "expert mode" display for advanced features). 
> 
> 
> I really like to have it in gui, to dynamic size my guests memory,without using 
> monitor. 
> 
> (note that citrix xenserver expose it by default) 

You already saw the patches on the qemu list to query free space with balloon driver? 
Maybe we can use that somehow?