[Qemu-discuss] Memory Ballooning for VM Issue

[xuanmao_001]

Hi, I have some problems with qemu ballooning.

 

I saw the qemu docs. I found the qemu monitor command "balloon" that can request VM to change its memory allocation to value(in MB).

it requested qemu command line with "-balloon virtio", then I start qemu into monitor mode with memory 512MB.

first show balloon information.

(qemu) info balloon

(qemu)balloon: actual=512

the command above if like this, I think the balloon device worked fine.

 

(qemu) balloon 400

there was no error when I executed this command.

but when I executed "info balloon", the result was still 512.

Is there something wrong?

please give me some ideas.

 

thanks.

 

qemu-kvm version: 1.0.1

linux kernel version: 3.1.6

 

 

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xuanmao_001