Re: [Qemu-devel] [RFC] virtio: Report new guest memory statistics pertinent to memory ballooning

[Anthony Liguori <aliguori@us.ibm.com>]

Avi Kivity wrote:
>>
>>
>>          (qemu) info balloon
>>          balloon: actual=1024 MB
>>          balloon: pswapin=0 pages
>>          balloon: pswapout=0 pages
>>          balloon: panon=3928 KB
>>          balloon: pgmajfault=0
>>          balloon: pgminfault=247914
>>          balloon: memfree=987032 KB
>>          balloon: memtot=1020812 KB
>>
>>         Is this agreeable?
>>    
>
> It's important that these statistics be cross platform.  Can you (or 
> someone knowledgeable in Windows) verify that all of these are 
> meaningful there?  I'd expect it to be so with the possible exception 
> of panon.

They don't have to all be cross platform.  We can expose platform 
specific metrics via feature bits.  We should only disable features that 
the guest has acknowledged.

But of course, whenever possible, we want metrics to be meaningful cross 
platform.

-- 
Regards,

Anthony Liguori