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Date: Fri, 19 Jun 2015 13:14:52 +0200
From: Piotr Rybicki <piotr.rybicki@innervision.pl>
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Subject: Re: [Qemu-devel] incorrect memory size inside vm
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To: Andrey Korolyov <andrey@xdel.ru>
Cc: libvir-list <libvir-list@redhat.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Vasiliy Tolstov <v.tolstov@selfip.ru>

Hello.

Actually it was my mistake.
After some time using memory in guest (find /, cp bigfine, etc), res 
size of qemu process shrinks to expected value.

Sorry for disturbing.
Now i don't see any memory waste in guest and host when using 'base' 
memory + 'dimm' memory.

Although i have one issue.

When i start qemu via libvirt with 16GB mem and 1G current mem:
(...)
   <memory unit='KiB'>16777216</memory>
   <currentMemory unit='KiB'>1048576</currentMemory>
(...)

Qemu starts, and balloon can't free memmory, so guest doesn't boot (It 
hangs or is looped in ' virtio_balloon virtio2: Out of puff! Can't get 1 
pages').
I think this is because dimm memmory is not yet onlined, and balloon 
already tries to shring memory in guest.

Best regards
Piotr Rybicki

W dniu 2015-06-18 o 23:23, Andrey Korolyov pisze:
>> Do You see similar results at Your side?
>>
>> Best regards
>
> Would you mind to share you argument set to an emulator? As far as I
> understood you are using plain ballooning with most results from above
> for which those numbers are expected. The case with 5+gig memory
> consumption for deflated 1G guest looks like a bug with mixed
> dimm/balloon configuration if you are tried against latest qemu, so
> please describe a setup a bit more verbosely too.